Add RTL support to GridView (#11921)

Fixes #11855

packages/flutter/lib/src/material/date_picker.dart

@@ -205,6 +205,7 @@ class _DayPickerGridDelegate extends SliverGridDelegate {
       crossAxisStride: tileWidth,
       childMainAxisExtent: tileHeight,
       childCrossAxisExtent: tileWidth,
+      reverseCrossAxis: axisDirectionIsReversed(constraints.crossAxisDirection),
     );
   }
 

packages/flutter/lib/src/material/expansion_panel.dart

@@ -80,7 +80,7 @@ class ExpansionPanelList extends StatelessWidget {
        assert(animationDuration != null),
        super(key: key);
 
-  /// The children of the expansion panel list. They are layed in a similar
+  /// The children of the expansion panel list. They are laid out in a similar
   /// fashion to [ListBody].
   final List<ExpansionPanel> children;
 

packages/flutter/lib/src/material/grid_tile.dart

@@ -49,15 +49,15 @@ class GridTile extends StatelessWidget {
 
     final List<Widget> children = <Widget>[
       new Positioned.fill(
-        child: child
-      )
+        child: child,
+      ),
     ];
     if (header != null) {
       children.add(new Positioned(
         top: 0.0,
         left: 0.0,
         right: 0.0,
-        child: header
+        child: header,
       ));
     }
     if (footer != null) {
@@ -65,7 +65,7 @@ class GridTile extends StatelessWidget {
         left: 0.0,
         bottom: 0.0,
         right: 0.0,
-        child: footer
+        child: footer,
       ));
     }
     return new Stack(children: children);

packages/flutter/lib/src/rendering/sliver.dart

@@ -89,6 +89,21 @@ Axis axisDirectionToAxis(AxisDirection axisDirection) {
   return null;
 }
 
+/// Returns the [AxisDirection] in which reading occurs in the given [TextDirection].
+///
+/// Specifically, returns [AxisDirection.left] for [TextDirection.rtl] and
+/// [AxisDirection.right] for [TextDirection.ltr].
+AxisDirection textDirectionToAxisDirection(TextDirection textDirection) {
+  assert(textDirection != null);
+  switch (textDirection) {
+    case TextDirection.rtl:
+      return AxisDirection.left;
+    case TextDirection.ltr:
+      return AxisDirection.right;
+  }
+  return null;
+}
+
 /// Returns the opposite of the given [AxisDirection].
 ///
 /// Specifically, returns [AxisDirection.up] for [AxisDirection.down] (and
@@ -192,6 +207,7 @@ class SliverConstraints extends Constraints {
     @required this.overlap,
     @required this.remainingPaintExtent,
     @required this.crossAxisExtent,
+    @required this.crossAxisDirection,
     @required this.viewportMainAxisExtent,
   }) : assert(axisDirection != null),
        assert(growthDirection != null),
@@ -200,6 +216,7 @@ class SliverConstraints extends Constraints {
        assert(overlap != null),
        assert(remainingPaintExtent != null),
        assert(crossAxisExtent != null),
+       assert(crossAxisDirection != null),
        assert(viewportMainAxisExtent != null);
 
   /// Creates a copy of this object but with the given fields replaced with the
@@ -212,6 +229,7 @@ class SliverConstraints extends Constraints {
     double overlap,
     double remainingPaintExtent,
     double crossAxisExtent,
+    AxisDirection crossAxisDirection,
     double viewportMainAxisExtent,
   }) {
     return new SliverConstraints(
@@ -222,6 +240,7 @@ class SliverConstraints extends Constraints {
       overlap: overlap ?? this.overlap,
       remainingPaintExtent: remainingPaintExtent ?? this.remainingPaintExtent,
       crossAxisExtent: crossAxisExtent ?? this.crossAxisExtent,
+      crossAxisDirection: crossAxisDirection ?? this.crossAxisDirection,
       viewportMainAxisExtent: viewportMainAxisExtent ?? this.viewportMainAxisExtent,
     );
   }
@@ -315,9 +334,15 @@ class SliverConstraints extends Constraints {
 
   /// The number of pixels in the cross-axis.
   ///
-  /// For a vertical list, this is the width of the sliver..
+  /// For a vertical list, this is the width of the sliver.
   final double crossAxisExtent;
 
+  /// The direction in which children should be placed in the cross axis.
+  ///
+  /// Typically used in vertical lists to describe whether the ambient
+  /// [TextDirection] is [TextDirection.rtl] or [TextDirection.ltr].
+  final AxisDirection crossAxisDirection;
+
   /// The number of pixels the viewport can display in the main axis.
   ///
   /// For a vertical list, this is the height of the viewport.
@@ -361,6 +386,7 @@ class SliverConstraints extends Constraints {
   bool get isNormalized {
     return scrollOffset >= 0.0
         && crossAxisExtent >= 0.0
+        && axisDirectionToAxis(axisDirection) != axisDirectionToAxis(crossAxisDirection)
         && viewportMainAxisExtent >= 0.0
         && remainingPaintExtent >= 0.0;
   }
@@ -421,6 +447,8 @@ class SliverConstraints extends Constraints {
       verify(viewportMainAxisExtent != null, 'The "viewportMainAxisExtent" is null.');
       verify(scrollOffset >= 0.0, 'The "scrollOffset" is negative.');
       verify(crossAxisExtent >= 0.0, 'The "crossAxisExtent" is negative.');
+      verify(crossAxisDirection != null, 'The "crossAxisDirection" is null.');
+      verify(axisDirectionToAxis(axisDirection) != axisDirectionToAxis(crossAxisDirection), 'The "axisDirection" and the "crossAxisDirection" are along the same axis.');
       verify(viewportMainAxisExtent >= 0.0, 'The "viewportMainAxisExtent" is negative.');
       verify(remainingPaintExtent >= 0.0, 'The "remainingPaintExtent" is negative.');
       verify(isNormalized, 'The constraints are not normalized.'); // should be redundant with earlier checks
@@ -437,18 +465,28 @@ class SliverConstraints extends Constraints {
       return false;
     final SliverConstraints typedOther = other;
     assert(typedOther.debugAssertIsValid());
-    return axisDirection == typedOther.axisDirection &&
-           growthDirection == typedOther.growthDirection &&
-           scrollOffset == typedOther.scrollOffset &&
-           overlap == typedOther.overlap &&
-           remainingPaintExtent == typedOther.remainingPaintExtent &&
-           crossAxisExtent == typedOther.crossAxisExtent &&
-           viewportMainAxisExtent == typedOther.viewportMainAxisExtent;
+    return typedOther.axisDirection == axisDirection
+        && typedOther.growthDirection == growthDirection
+        && typedOther.scrollOffset == scrollOffset
+        && typedOther.overlap == overlap
+        && typedOther.remainingPaintExtent == remainingPaintExtent
+        && typedOther.crossAxisExtent == crossAxisExtent
+        && typedOther.crossAxisDirection == crossAxisDirection
+        && typedOther.viewportMainAxisExtent == viewportMainAxisExtent;
   }
 
   @override
   int get hashCode {
-    return hashValues(axisDirection, growthDirection, scrollOffset, overlap, remainingPaintExtent, crossAxisExtent, viewportMainAxisExtent);
+    return hashValues(
+      axisDirection,
+      growthDirection,
+      scrollOffset,
+      overlap,
+      remainingPaintExtent,
+      crossAxisExtent,
+      crossAxisDirection,
+      viewportMainAxisExtent,
+    );
   }
 
   @override
@@ -461,6 +499,7 @@ class SliverConstraints extends Constraints {
              'remainingPaintExtent: ${remainingPaintExtent.toStringAsFixed(1)}, ' +
              (overlap != 0.0 ? 'overlap: ${overlap.toStringAsFixed(1)}, ' : '') +
              'crossAxisExtent: ${crossAxisExtent.toStringAsFixed(1)}, ' +
+             'crossAxisDirection: $crossAxisDirection, ' +
              'viewportMainAxisExtent: ${viewportMainAxisExtent.toStringAsFixed(1)}' +
            ')';
   }

packages/flutter/lib/src/rendering/sliver_grid.dart

@@ -151,11 +151,13 @@ class SliverGridRegularTileLayout extends SliverGridLayout {
     @required this.crossAxisStride,
     @required this.childMainAxisExtent,
     @required this.childCrossAxisExtent,
+    @required this.reverseCrossAxis,
   }) : assert(crossAxisCount != null && crossAxisCount > 0),
        assert(mainAxisStride != null && mainAxisStride >= 0),
        assert(crossAxisStride != null && crossAxisStride >= 0),
        assert(childMainAxisExtent != null && childMainAxisExtent >= 0),
-       assert(childCrossAxisExtent != null && childCrossAxisExtent >= 0);
+       assert(childCrossAxisExtent != null && childCrossAxisExtent >= 0),
+       assert(reverseCrossAxis != null);
 
   /// The number of children in the cross axis.
   final int crossAxisCount;
@@ -176,6 +178,17 @@ class SliverGridRegularTileLayout extends SliverGridLayout {
   /// edge of the same tile in the cross axis.
   final double childCrossAxisExtent;
 
+  /// Whether the children should be placed in the opposite order of increasing
+  /// coordinates in the cross axis.
+  ///
+  /// For example, if the cross axis is horizontal, the children are placed from
+  /// left to right when [reverseCrossAxis] is false and from right to left when
+  /// [reverseCrossAxis] is true.
+  ///
+  /// Typically set to the return value of [axisDirectionIsReversed] applied to
+  /// the [SliverConstraints.crossAxisDirection].
+  final bool reverseCrossAxis;
+
   @override
   int getMinChildIndexForScrollOffset(double scrollOffset) {
     return mainAxisStride > 0.0 ? crossAxisCount * (scrollOffset ~/ mainAxisStride) : 0;
@@ -190,11 +203,18 @@ class SliverGridRegularTileLayout extends SliverGridLayout {
     return 0;
   }
 
+  double _getOffsetFromStartInCrossAxis(double crossAxisStart) {
+    if (reverseCrossAxis)
+      return crossAxisCount * crossAxisStride - crossAxisStart - childCrossAxisExtent;
+    return crossAxisStart;
+  }
+
   @override
   SliverGridGeometry getGeometryForChildIndex(int index) {
+    final double crossAxisStart = (index % crossAxisCount) * crossAxisStride;
     return new SliverGridGeometry(
       scrollOffset: (index ~/ crossAxisCount) * mainAxisStride,
-      crossAxisOffset: (index % crossAxisCount) * crossAxisStride,
+      crossAxisOffset: _getOffsetFromStartInCrossAxis(crossAxisStart),
       mainAxisExtent: childMainAxisExtent,
       crossAxisExtent: childCrossAxisExtent,
     );
@@ -313,6 +333,7 @@ class SliverGridDelegateWithFixedCrossAxisCount extends SliverGridDelegate {
       crossAxisStride: childCrossAxisExtent + crossAxisSpacing,
       childMainAxisExtent: childMainAxisExtent,
       childCrossAxisExtent: childCrossAxisExtent,
+      reverseCrossAxis: axisDirectionIsReversed(constraints.crossAxisDirection),
     );
   }
 
@@ -410,6 +431,7 @@ class SliverGridDelegateWithMaxCrossAxisExtent extends SliverGridDelegate {
       crossAxisStride: childCrossAxisExtent + crossAxisSpacing,
       childMainAxisExtent: childMainAxisExtent,
       childCrossAxisExtent: childCrossAxisExtent,
+      reverseCrossAxis: axisDirectionIsReversed(constraints.crossAxisDirection),
     );
   }
 

packages/flutter/lib/src/rendering/viewport.dart

@@ -81,10 +81,14 @@ abstract class RenderViewportBase<ParentDataClass extends ContainerParentDataMix
   /// Initializes fields for subclasses.
   RenderViewportBase({
     AxisDirection axisDirection: AxisDirection.down,
+    @required AxisDirection crossAxisDirection,
     @required ViewportOffset offset,
   }) : assert(axisDirection != null),
+       assert(crossAxisDirection != null),
        assert(offset != null),
+       assert(axisDirectionToAxis(axisDirection) != axisDirectionToAxis(crossAxisDirection)),
        _axisDirection = axisDirection,
+       _crossAxisDirection = crossAxisDirection,
        _offset = offset;
 
   @override
@@ -118,6 +122,22 @@ abstract class RenderViewportBase<ParentDataClass extends ContainerParentDataMix
     markNeedsLayout();
   }
 
+  /// The direction in which child should be laid out in the cross axis.
+  ///
+  /// For example, if the [axisDirection] is [AxisDirection.down], this property
+  /// is typically [AxisDirection.left] if the ambient [TextDirection] is
+  /// [TextDirection.rtl] and [AxisDirection.right] if the ambient
+  /// [TextDirection] is [TextDirection.ltr].
+  AxisDirection get crossAxisDirection => _crossAxisDirection;
+  AxisDirection _crossAxisDirection;
+  set crossAxisDirection(AxisDirection value) {
+    assert(value != null);
+    if (value == _crossAxisDirection)
+      return;
+    _crossAxisDirection = value;
+    markNeedsLayout();
+  }
+
   /// The axis along which the viewport scrolls.
   ///
   /// For example, if the [axisDirection] is [AxisDirection.down], then the
@@ -271,6 +291,7 @@ abstract class RenderViewportBase<ParentDataClass extends ContainerParentDataMix
         overlap: maxPaintOffset - layoutOffset,
         remainingPaintExtent: math.max(0.0, remainingPaintExtent - layoutOffset + initialLayoutOffset),
         crossAxisExtent: crossAxisExtent,
+        crossAxisDirection: crossAxisDirection,
         viewportMainAxisExtent: mainAxisExtent,
       ), parentUsesSize: true);
 
@@ -507,6 +528,7 @@ abstract class RenderViewportBase<ParentDataClass extends ContainerParentDataMix
   void debugFillProperties(DiagnosticPropertiesBuilder description) {
     super.debugFillProperties(description);
     description.add(new EnumProperty<AxisDirection>('axisDirection', axisDirection));
+    description.add(new EnumProperty<AxisDirection>('crossAxisDirection', crossAxisDirection));
     description.add(new DiagnosticsProperty<ViewportOffset>('offset', offset));
   }
 
@@ -687,6 +709,7 @@ class RenderViewport extends RenderViewportBase<SliverPhysicalContainerParentDat
   /// [new ViewportOffset.zero] or [new ViewportOffset.fixed].
   RenderViewport({
     AxisDirection axisDirection: AxisDirection.down,
+    @required AxisDirection crossAxisDirection,
     @required ViewportOffset offset,
     double anchor: 0.0,
     List<RenderSliver> children,
@@ -695,7 +718,7 @@ class RenderViewport extends RenderViewportBase<SliverPhysicalContainerParentDat
        assert(anchor >= 0.0 && anchor <= 1.0),
        _anchor = anchor,
        _center = center,
-       super(axisDirection: axisDirection, offset: offset) {
+       super(axisDirection: axisDirection, crossAxisDirection: crossAxisDirection, offset: offset) {
     addAll(children);
     if (center == null && firstChild != null)
       _center = firstChild;
@@ -1120,9 +1143,10 @@ class RenderShrinkWrappingViewport extends RenderViewportBase<SliverLogicalConta
   /// [new ViewportOffset.zero] or [new ViewportOffset.fixed].
   RenderShrinkWrappingViewport({
     AxisDirection axisDirection: AxisDirection.down,
+    @required AxisDirection crossAxisDirection,
     @required ViewportOffset offset,
     List<RenderSliver> children,
-  }) : super(axisDirection: axisDirection, offset: offset) {
+  }) : super(axisDirection: axisDirection, crossAxisDirection: crossAxisDirection, offset: offset) {
     addAll(children);
   }
 

packages/flutter/lib/src/widgets/page_view.dart

@@ -453,13 +453,8 @@ class _PageViewState extends State<PageView> {
       case Axis.horizontal:
         final TextDirection textDirection = Directionality.of(context);
         assert(textDirection != null);
-        switch (textDirection) {
-          case TextDirection.rtl:
-            return widget.reverse ? AxisDirection.right : AxisDirection.left;
-          case TextDirection.ltr:
-            return widget.reverse ? AxisDirection.left : AxisDirection.right;
-        }
-        return null;
+        final AxisDirection axisDirection = textDirectionToAxisDirection(textDirection);
+        return widget.reverse ? flipAxisDirection(axisDirection) : axisDirection;
       case Axis.vertical:
         return widget.reverse ? AxisDirection.up : AxisDirection.down;
     }

packages/flutter/lib/src/widgets/scroll_view.dart

@@ -182,13 +182,8 @@ abstract class ScrollView extends StatelessWidget {
       case Axis.horizontal:
         final TextDirection textDirection = Directionality.of(context);
         assert(textDirection != null);
-        switch (textDirection) {
-          case TextDirection.rtl:
-            return reverse ? AxisDirection.right : AxisDirection.left;
-          case TextDirection.ltr:
-            return reverse ? AxisDirection.left : AxisDirection.right;
-        }
-        return null;
+        final AxisDirection axisDirection = textDirectionToAxisDirection(textDirection);
+        return reverse ? flipAxisDirection(axisDirection) : axisDirection;
       case Axis.vertical:
         return reverse ? AxisDirection.up : AxisDirection.down;
     }

packages/flutter/lib/src/widgets/single_child_scroll_view.dart

@@ -119,13 +119,8 @@ class SingleChildScrollView extends StatelessWidget {
       case Axis.horizontal:
         final TextDirection textDirection = Directionality.of(context);
         assert(textDirection != null);
-        switch (textDirection) {
-          case TextDirection.rtl:
-            return reverse ? AxisDirection.right : AxisDirection.left;
-          case TextDirection.ltr:
-            return reverse ? AxisDirection.left : AxisDirection.right;
-        }
-        return null;
+        final AxisDirection axisDirection = textDirectionToAxisDirection(textDirection);
+        return reverse ? flipAxisDirection(axisDirection) : axisDirection;
       case Axis.vertical:
         return reverse ? AxisDirection.up : AxisDirection.down;
     }

packages/flutter/lib/src/widgets/viewport.dart

@@ -5,12 +5,28 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 
+import 'basic.dart';
 import 'framework.dart';
 
 export 'package:flutter/rendering.dart' show
   AxisDirection,
   GrowthDirection;
 
+AxisDirection _getDefaultCrossAxisDirection(BuildContext context, AxisDirection axisDirection) {
+  assert(axisDirection != null);
+  switch (axisDirection) {
+    case AxisDirection.up:
+      return textDirectionToAxisDirection(Directionality.of(context));
+    case AxisDirection.right:
+      return AxisDirection.down;
+    case AxisDirection.down:
+      return textDirectionToAxisDirection(Directionality.of(context));
+    case AxisDirection.left:
+      return AxisDirection.down;
+  }
+  return null;
+}
+
 /// A widget that is bigger on the inside.
 ///
 /// [Viewport] is the visual workhorse of the scrolling machinery. It displays a
@@ -52,6 +68,7 @@ class Viewport extends MultiChildRenderObjectWidget {
   Viewport({
     Key key,
     this.axisDirection: AxisDirection.down,
+    this.crossAxisDirection,
     this.anchor: 0.0,
     @required this.offset,
     this.center,
@@ -68,6 +85,17 @@ class Viewport extends MultiChildRenderObjectWidget {
   /// bottom of the viewport.
   final AxisDirection axisDirection;
 
+  /// The direction in which child should be laid out in the cross axis.
+  ///
+  /// If the [axisDirection] is [AxisDirection.down] or [AxisDirection.up], this
+  /// property defaults to [AxisDirection.left] if the ambient [Directionality]
+  /// is [TextDirection.rtl] and [AxisDirection.right] if the ambient
+  /// [Directionality] is [TextDirection.ltr].
+  ///
+  /// If the [axisDirection] is [AxisDirection.left] or [AxisDirection.right],
+  /// this property defaults to [AxisDirection.down].
+  final AxisDirection crossAxisDirection;
+
   /// The relative position of the zero scroll offset.
   ///
   /// For example, if [anchor] is 0.5 and the [axisDirection] is
@@ -100,6 +128,7 @@ class Viewport extends MultiChildRenderObjectWidget {
   RenderViewport createRenderObject(BuildContext context) {
     return new RenderViewport(
       axisDirection: axisDirection,
+      crossAxisDirection: crossAxisDirection ?? _getDefaultCrossAxisDirection(context, axisDirection),
       anchor: anchor,
       offset: offset,
     );
@@ -107,9 +136,11 @@ class Viewport extends MultiChildRenderObjectWidget {
 
   @override
   void updateRenderObject(BuildContext context, RenderViewport renderObject) {
-    renderObject.axisDirection = axisDirection;
-    renderObject.anchor = anchor;
-    renderObject.offset = offset;
+    renderObject
+      ..axisDirection = axisDirection
+      ..crossAxisDirection = crossAxisDirection ?? _getDefaultCrossAxisDirection(context, axisDirection)
+      ..anchor = anchor
+      ..offset = offset;
   }
 
   @override
@@ -119,6 +150,7 @@ class Viewport extends MultiChildRenderObjectWidget {
   void debugFillProperties(DiagnosticPropertiesBuilder description) {
     super.debugFillProperties(description);
     description.add(new EnumProperty<AxisDirection>('axisDirection', axisDirection));
+    description.add(new EnumProperty<AxisDirection>('crossAxisDirection', crossAxisDirection, defaultValue: null));
     description.add(new DoubleProperty('anchor', anchor));
     description.add(new DiagnosticsProperty<ViewportOffset>('offset', offset));
     if (center != null) {
@@ -201,6 +233,7 @@ class ShrinkWrappingViewport extends MultiChildRenderObjectWidget {
   ShrinkWrappingViewport({
     Key key,
     this.axisDirection: AxisDirection.down,
+    this.crossAxisDirection,
     @required this.offset,
     List<Widget> slivers: const <Widget>[],
   }) : assert(offset != null),
@@ -213,6 +246,17 @@ class ShrinkWrappingViewport extends MultiChildRenderObjectWidget {
   /// bottom of the viewport.
   final AxisDirection axisDirection;
 
+  /// The direction in which child should be laid out in the cross axis.
+  ///
+  /// If the [axisDirection] is [AxisDirection.down] or [AxisDirection.up], this
+  /// property defaults to [AxisDirection.left] if the ambient [Directionality]
+  /// is [TextDirection.rtl] and [AxisDirection.right] if the ambient
+  /// [Directionality] is [TextDirection.ltr].
+  ///
+  /// If the [axisDirection] is [AxisDirection.left] or [AxisDirection.right],
+  /// this property defaults to [AxisDirection.down].
+  final AxisDirection crossAxisDirection;
+
   /// Which part of the content inside the viewport should be visible.
   ///
   /// The [ViewportOffset.pixels] value determines the scroll offset that the
@@ -227,6 +271,7 @@ class ShrinkWrappingViewport extends MultiChildRenderObjectWidget {
   RenderShrinkWrappingViewport createRenderObject(BuildContext context) {
     return new RenderShrinkWrappingViewport(
       axisDirection: axisDirection,
+      crossAxisDirection: crossAxisDirection ?? _getDefaultCrossAxisDirection(context, axisDirection),
       offset: offset,
     );
   }
@@ -235,6 +280,7 @@ class ShrinkWrappingViewport extends MultiChildRenderObjectWidget {
   void updateRenderObject(BuildContext context, RenderShrinkWrappingViewport renderObject) {
     renderObject
       ..axisDirection = axisDirection
+      ..crossAxisDirection = crossAxisDirection ?? _getDefaultCrossAxisDirection(context, axisDirection)
       ..offset = offset;
   }
 
@@ -242,6 +288,7 @@ class ShrinkWrappingViewport extends MultiChildRenderObjectWidget {
   void debugFillProperties(DiagnosticPropertiesBuilder description) {
     super.debugFillProperties(description);
     description.add(new EnumProperty<AxisDirection>('axisDirection', axisDirection));
+    description.add(new EnumProperty<AxisDirection>('crossAxisDirection', crossAxisDirection, defaultValue: null));
     description.add(new DiagnosticsProperty<ViewportOffset>('offset', offset));
   }
 }

packages/flutter/test/material/ink_well_test.dart

@@ -121,19 +121,24 @@ void main() {
 
   testWidgets('splashing survives scrolling when keep-alive is enabled', (WidgetTester tester) async {
     Future<Null> runTest(bool keepAlive) async {
-      await tester.pumpWidget(new Material(
-        child: new CompositedTransformFollower( // forces a layer, which makes the paints easier to separate out
-          link: new LayerLink(),
-          child: new ListView(
-            addAutomaticKeepAlives: keepAlive,
-            children: <Widget>[
-              new Container(height: 500.0, child: new InkWell(onTap: () { }, child: const Placeholder())),
-              new Container(height: 500.0),
-              new Container(height: 500.0),
-            ],
+      await tester.pumpWidget(
+        new Directionality(
+          textDirection: TextDirection.ltr,
+          child: new Material(
+            child: new CompositedTransformFollower( // forces a layer, which makes the paints easier to separate out
+              link: new LayerLink(),
+              child: new ListView(
+                addAutomaticKeepAlives: keepAlive,
+                children: <Widget>[
+                  new Container(height: 500.0, child: new InkWell(onTap: () { }, child: const Placeholder())),
+                  new Container(height: 500.0),
+                  new Container(height: 500.0),
+                ],
+              ),
+            ),
           ),
         ),
-      ));
+      );
       expect(tester.renderObject<RenderProxyBox>(find.byType(PhysicalModel)).child, paintsNothing);
       await tester.tap(find.byType(InkWell));
       await tester.pump();

packages/flutter/test/material/material_test.dart

@@ -60,41 +60,44 @@ void main() {
     final List<Size> log = <Size>[];
 
     await tester.pumpWidget(
-      new Column(
-        children: <Widget>[
-          new SizedBox(
-            width: 150.0,
-            height: 150.0,
-            child: new CustomPaint(
-              painter: new PaintRecorder(log),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Column(
+          children: <Widget>[
+            new SizedBox(
+              width: 150.0,
+              height: 150.0,
+              child: new CustomPaint(
+                painter: new PaintRecorder(log),
+              ),
             ),
-          ),
-          new Expanded(
-            child: new Material(
-              child: new Column(
-                children: <Widget>[
-                  new Expanded(
-                    child: new ListView(
-                      children: <Widget>[
-                        new Container(
-                          height: 2000.0,
-                          color: const Color(0xFF00FF00),
-                        ),
-                      ],
+            new Expanded(
+              child: new Material(
+                child: new Column(
+                  children: <Widget>[
+                    new Expanded(
+                      child: new ListView(
+                        children: <Widget>[
+                          new Container(
+                            height: 2000.0,
+                            color: const Color(0xFF00FF00),
+                          ),
+                        ],
+                      ),
                     ),
-                  ),
-                  new SizedBox(
-                    width: 100.0,
-                    height: 100.0,
-                    child: new CustomPaint(
-                      painter: new PaintRecorder(log),
+                    new SizedBox(
+                      width: 100.0,
+                      height: 100.0,
+                      child: new CustomPaint(
+                        painter: new PaintRecorder(log),
+                      ),
                     ),
-                  ),
-                ],
+                  ],
+                ),
               ),
             ),
-          ),
-        ],
+          ],
+        ),
       ),
     );
 

packages/flutter/test/material/refresh_indicator_test.dart

@@ -23,16 +23,19 @@ void main() {
   testWidgets('RefreshIndicator', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <String>['A', 'B', 'C', 'D', 'E', 'F'].map((String item) {
-            return new SizedBox(
-              height: 200.0,
-              child: new Text(item),
-            );
-          }).toList(),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <String>['A', 'B', 'C', 'D', 'E', 'F'].map((String item) {
+              return new SizedBox(
+                height: 200.0,
+                child: new Text(item),
+              );
+            }).toList(),
+          ),
         ),
       ),
     );
@@ -48,17 +51,20 @@ void main() {
   testWidgets('RefreshIndicator - bottom', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          reverse: true,
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            reverse: true,
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -74,16 +80,19 @@ void main() {
   testWidgets('RefreshIndicator - top - position', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: holdRefresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: holdRefresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -98,17 +107,20 @@ void main() {
   testWidgets('RefreshIndicator - bottom - position', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: holdRefresh,
-        child: new ListView(
-          reverse: true,
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: holdRefresh,
+          child: new ListView(
+            reverse: true,
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -123,16 +135,19 @@ void main() {
   testWidgets('RefreshIndicator - no movement', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -149,16 +164,19 @@ void main() {
   testWidgets('RefreshIndicator - not enough', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -174,16 +192,19 @@ void main() {
   testWidgets('RefreshIndicator - show - slow', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: holdRefresh, // this one never returns
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: holdRefresh, // this one never returns
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -215,16 +236,19 @@ void main() {
   testWidgets('RefreshIndicator - show - fast', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );
@@ -257,16 +281,19 @@ void main() {
   testWidgets('RefreshIndicator - show - fast - twice', (WidgetTester tester) async {
     refreshCalled = false;
     await tester.pumpWidget(
-      new RefreshIndicator(
-        onRefresh: refresh,
-        child: new ListView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          children: <Widget>[
-            const SizedBox(
-              height: 200.0,
-              child: const Text('X'),
-            ),
-          ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new RefreshIndicator(
+          onRefresh: refresh,
+          child: new ListView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            children: <Widget>[
+              const SizedBox(
+                height: 200.0,
+                child: const Text('X'),
+              ),
+            ],
+          ),
         ),
       ),
     );

packages/flutter/test/rendering/debug_test.dart

@@ -79,6 +79,7 @@ void main() {
     RenderSliver s;
     RenderBox b;
     final RenderViewport root = new RenderViewport(
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         s = new RenderSliverPadding(
@@ -106,6 +107,7 @@ void main() {
     final RenderBox b = new RenderPadding(
       padding: const EdgeInsets.all(10.0),
       child: new RenderViewport(
+        crossAxisDirection: AxisDirection.right,
         offset: new ViewportOffset.zero(),
         children: <RenderSliver>[
           s = new RenderSliverPadding(

packages/flutter/test/rendering/slivers_block_test.dart

@@ -78,6 +78,7 @@ void main() {
     );
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.down,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         inner = childManager.createRenderObject(),
@@ -152,6 +153,7 @@ void main() {
     );
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.up,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         inner = childManager.createRenderObject(),
@@ -226,6 +228,7 @@ void main() {
     );
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.down,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         inner = childManager.createRenderObject(),

packages/flutter/test/rendering/slivers_helpers_test.dart

@@ -25,6 +25,7 @@ void main() {
       overlap: 0.0,
       remainingPaintExtent: 0.0,
       crossAxisExtent: 0.0,
+      crossAxisDirection: AxisDirection.right,
       viewportMainAxisExtent: 0.0,
     );
     final SliverConstraints b = a.copyWith();
@@ -52,6 +53,7 @@ void main() {
       overlap: 20.0,
       remainingPaintExtent: 30.0,
       crossAxisExtent: 40.0,
+      crossAxisDirection: AxisDirection.right,
       viewportMainAxisExtent: 30.0,
     );
     expect(c, equals(d));

packages/flutter/test/rendering/slivers_layout_test.dart

@@ -25,6 +25,7 @@ void main() {
     RenderBox box;
     final RenderObject root = new RenderLayoutWatcher(
       viewport = new RenderViewport(
+        crossAxisDirection: AxisDirection.right,
         offset: new ViewportOffset.zero(),
         children: <RenderSliver>[
           sliver = new RenderSliverToBoxAdapter(child: box = new RenderSizedBox(const Size(100.0, 400.0))),

packages/flutter/test/rendering/slivers_test.dart

@@ -11,6 +11,7 @@ import 'rendering_tester.dart';
 void main() {
   test('RenderViewport basic test - no children', () {
     final RenderViewport root = new RenderViewport(
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
     );
     expect(root, hasAGoodToStringDeep);
@@ -22,6 +23,7 @@ void main() {
         '   constraints: null\n'
         '   size: MISSING\n'
         '   axisDirection: down\n'
+        '   crossAxisDirection: right\n'
         '   offset: _FixedViewportOffset#00000(offset: 0.0)\n'
         '   anchor: 0.0\n'
       ),
@@ -37,6 +39,7 @@ void main() {
         '   constraints: BoxConstraints(w=800.0, h=600.0)\n'
         '   size: Size(800.0, 600.0)\n'
         '   axisDirection: down\n'
+        '   crossAxisDirection: right\n'
         '   offset: _FixedViewportOffset#00000(offset: 900.0)\n'
         '   anchor: 0.0\n',
       ),
@@ -48,6 +51,7 @@ void main() {
   test('RenderViewport basic test - down', () {
     RenderBox a, b, c, d, e;
     final RenderViewport root = new RenderViewport(
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(100.0, 400.0))),
@@ -72,6 +76,7 @@ void main() {
         ' │ constraints: BoxConstraints(w=800.0, h=600.0)\n'
         ' │ size: Size(800.0, 600.0)\n'
         ' │ axisDirection: down\n'
+        ' │ crossAxisDirection: right\n'
         ' │ offset: _FixedViewportOffset#00000(offset: 0.0)\n'
         ' │ anchor: 0.0\n'
         ' │\n'
@@ -80,6 +85,7 @@ void main() {
         ' │ │ constraints: SliverConstraints(AxisDirection.down,\n'
         ' │ │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         ' │ │   0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0,\n'
+        ' │ │   crossAxisDirection: AxisDirection.right,\n'
         ' │ │   viewportMainAxisExtent: 600.0)\n'
         ' │ │ geometry: SliverGeometry(scrollExtent: 400.0, paintExtent: 400.0,\n'
         ' │ │   maxPaintExtent: 400.0)\n'
@@ -94,6 +100,7 @@ void main() {
         ' │ │ constraints: SliverConstraints(AxisDirection.down,\n'
         ' │ │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         ' │ │   0.0, remainingPaintExtent: 200.0, crossAxisExtent: 800.0,\n'
+        ' │ │   crossAxisDirection: AxisDirection.right,\n'
         ' │ │   viewportMainAxisExtent: 600.0)\n'
         ' │ │ geometry: SliverGeometry(scrollExtent: 400.0, paintExtent: 200.0,\n'
         ' │ │   maxPaintExtent: 400.0, hasVisualOverflow: true)\n'
@@ -108,6 +115,7 @@ void main() {
         ' │ │ constraints: SliverConstraints(AxisDirection.down,\n'
         ' │ │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         ' │ │   0.0, remainingPaintExtent: 0.0, crossAxisExtent: 800.0,\n'
+        ' │ │   crossAxisDirection: AxisDirection.right,\n'
         ' │ │   viewportMainAxisExtent: 600.0)\n'
         ' │ │ geometry: SliverGeometry(scrollExtent: 400.0, hidden,\n'
         ' │ │   maxPaintExtent: 400.0, hasVisualOverflow: true)\n'
@@ -122,6 +130,7 @@ void main() {
         ' │ │ constraints: SliverConstraints(AxisDirection.down,\n'
         ' │ │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         ' │ │   0.0, remainingPaintExtent: 0.0, crossAxisExtent: 800.0,\n'
+        ' │ │   crossAxisDirection: AxisDirection.right,\n'
         ' │ │   viewportMainAxisExtent: 600.0)\n'
         ' │ │ geometry: SliverGeometry(scrollExtent: 400.0, hidden,\n'
         ' │ │   maxPaintExtent: 400.0, hasVisualOverflow: true)\n'
@@ -136,6 +145,7 @@ void main() {
         '   │ constraints: SliverConstraints(AxisDirection.down,\n'
         '   │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         '   │   0.0, remainingPaintExtent: 0.0, crossAxisExtent: 800.0,\n'
+        '   │   crossAxisDirection: AxisDirection.right,\n'
         '   │   viewportMainAxisExtent: 600.0)\n'
         '   │ geometry: SliverGeometry(scrollExtent: 400.0, hidden,\n'
         '   │   maxPaintExtent: 400.0, hasVisualOverflow: true)\n'
@@ -143,7 +153,7 @@ void main() {
         '   └─child: RenderSizedBox#00000 NEEDS-PAINT\n'
         '       parentData: paintOffset=Offset(0.0, -0.0) (can use size)\n'
         '       constraints: BoxConstraints(w=800.0, 0.0<=h<=Infinity)\n'
-        '       size: Size(800.0, 400.0)\n',
+        '       size: Size(800.0, 400.0)\n'
       ),
     );
     expect(a.localToGlobal(const Offset(0.0, 0.0)), const Offset(0.0, 0.0));
@@ -191,6 +201,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.up,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(100.0, 400.0))),
@@ -249,6 +260,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.right,
+      crossAxisDirection: AxisDirection.down,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(400.0, 100.0))),
@@ -332,6 +344,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.left,
+      crossAxisDirection: AxisDirection.down,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(400.0, 100.0))),
@@ -387,6 +400,7 @@ void main() {
 
   test('RenderShrinkWrappingViewport basic test - no children', () {
     final RenderShrinkWrappingViewport root = new RenderShrinkWrappingViewport(
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
     );
     expect(root, hasAGoodToStringDeep);
@@ -398,6 +412,7 @@ void main() {
   test('RenderShrinkWrappingViewport basic test - down', () {
     RenderBox a, b, c, d, e;
     final RenderShrinkWrappingViewport root = new RenderShrinkWrappingViewport(
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(100.0, 400.0))),
@@ -457,6 +472,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderShrinkWrappingViewport root = new RenderShrinkWrappingViewport(
       axisDirection: AxisDirection.up,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(100.0, 400.0))),
@@ -510,6 +526,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderShrinkWrappingViewport root = new RenderShrinkWrappingViewport(
       axisDirection: AxisDirection.right,
+      crossAxisDirection: AxisDirection.down,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(400.0, 100.0))),
@@ -563,6 +580,7 @@ void main() {
     RenderBox a, b, c, d, e;
     final RenderShrinkWrappingViewport root = new RenderShrinkWrappingViewport(
       axisDirection: AxisDirection.left,
+      crossAxisDirection: AxisDirection.down,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         new RenderSliverToBoxAdapter(child: a = new RenderSizedBox(const Size(400.0, 100.0))),
@@ -617,6 +635,7 @@ void main() {
     final RenderBox root = new RenderPositionedBox(
       child: child = new RenderShrinkWrappingViewport(
         axisDirection: AxisDirection.left,
+        crossAxisDirection: AxisDirection.down,
         offset: new ViewportOffset.fixed(200.0),
         children: <RenderSliver>[
           new RenderSliverToBoxAdapter(child: new RenderSizedBox(const Size(400.0, 100.0))),
@@ -636,6 +655,7 @@ void main() {
     final RenderBox root = new RenderPositionedBox(
       child: child = new RenderShrinkWrappingViewport(
         axisDirection: AxisDirection.right,
+        crossAxisDirection: AxisDirection.down,
         offset: new ViewportOffset.fixed(200.0),
         children: <RenderSliver>[
           new RenderSliverToBoxAdapter(child: new RenderSizedBox(const Size(300.0, 100.0))),
@@ -687,6 +707,7 @@ void main() {
     );
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.down,
+      crossAxisDirection: AxisDirection.right,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         sliver,
@@ -708,6 +729,7 @@ void main() {
     );
     final RenderViewport root = new RenderViewport(
       axisDirection: AxisDirection.right,
+      crossAxisDirection: AxisDirection.down,
       offset: new ViewportOffset.zero(),
       children: <RenderSliver>[
         sliver,

packages/flutter/test/widgets/animated_list_test.dart

@@ -10,17 +10,20 @@ void main() {
     final Map<int, Animation<double>> animations = <int, Animation<double>>{};
 
     await tester.pumpWidget(
-      new AnimatedList(
-        initialItemCount: 2,
-        itemBuilder: (BuildContext context, int index, Animation<double> animation) {
-          animations[index] = animation;
-          return new SizedBox(
-            height: 100.0,
-            child: new Center(
-              child: new Text('item $index'),
-            ),
-          );
-        },
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new AnimatedList(
+          initialItemCount: 2,
+          itemBuilder: (BuildContext context, int index, Animation<double> animation) {
+            animations[index] = animation;
+            return new SizedBox(
+              height: 100.0,
+              child: new Center(
+                child: new Text('item $index'),
+              ),
+            );
+          },
+        ),
       ),
     );
 
@@ -36,21 +39,24 @@ void main() {
     final GlobalKey<AnimatedListState> listKey = new GlobalKey<AnimatedListState>();
 
     await tester.pumpWidget(
-      new AnimatedList(
-        key: listKey,
-        itemBuilder: (BuildContext context, int index, Animation<double> animation) {
-          return new SizeTransition(
-            key: new ValueKey<int>(index),
-            axis: Axis.vertical,
-            sizeFactor: animation,
-            child: new SizedBox(
-              height: 100.0,
-              child: new Center(
-                child: new Text('item $index'),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new AnimatedList(
+          key: listKey,
+          itemBuilder: (BuildContext context, int index, Animation<double> animation) {
+            return new SizeTransition(
+              key: new ValueKey<int>(index),
+              axis: Axis.vertical,
+              sizeFactor: animation,
+              child: new SizedBox(
+                height: 100.0,
+                child: new Center(
+                  child: new Text('item $index'),
+                ),
               ),
-            ),
-          );
-        },
+            );
+          },
+        ),
       ),
     );
 
@@ -122,12 +128,15 @@ void main() {
     }
 
     await tester.pumpWidget(
-      new AnimatedList(
-        key: listKey,
-        initialItemCount: 3,
-        itemBuilder: (BuildContext context, int index, Animation<double> animation) {
-          return buildItem(context, items[index], animation);
-        },
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new AnimatedList(
+          key: listKey,
+          initialItemCount: 3,
+          itemBuilder: (BuildContext context, int index, Animation<double> animation) {
+            return buildItem(context, items[index], animation);
+          },
+        ),
       ),
     );
 

packages/flutter/test/widgets/automatic_keep_alive_test.dart

@@ -65,12 +65,17 @@ List<Widget> generateList(Widget child, { @required bool impliedMode }) {
 
 void tests({ @required bool impliedMode }) {
   testWidgets('AutomaticKeepAlive with ListView with itemExtent', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      addAutomaticKeepAlives: impliedMode,
-      addRepaintBoundaries: impliedMode,
-      itemExtent: 12.3, // about 50 widgets visible
-      children: generateList(const Placeholder(), impliedMode: impliedMode),
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          addAutomaticKeepAlives: impliedMode,
+          addRepaintBoundaries: impliedMode,
+          itemExtent: 12.3, // about 50 widgets visible
+          children: generateList(const Placeholder(), impliedMode: impliedMode),
+        ),
+      ),
+    );
     expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsNothing);
@@ -105,14 +110,19 @@ void tests({ @required bool impliedMode }) {
   });
 
   testWidgets('AutomaticKeepAlive with ListView without itemExtent', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      addAutomaticKeepAlives: impliedMode,
-      addRepaintBoundaries: impliedMode,
-      children: generateList(
-        new Container(height: 12.3, child: const Placeholder()), // about 50 widgets visible
-        impliedMode: impliedMode,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          addAutomaticKeepAlives: impliedMode,
+          addRepaintBoundaries: impliedMode,
+          children: generateList(
+            new Container(height: 12.3, child: const Placeholder()), // about 50 widgets visible
+            impliedMode: impliedMode,
+          ),
+        ),
       ),
-    ));
+    );
     expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsNothing);
@@ -147,16 +157,21 @@ void tests({ @required bool impliedMode }) {
   });
 
   testWidgets('AutomaticKeepAlive with GridView', (WidgetTester tester) async {
-    await tester.pumpWidget(new GridView.count(
-      addAutomaticKeepAlives: impliedMode,
-      addRepaintBoundaries: impliedMode,
-      crossAxisCount: 2,
-      childAspectRatio: 400.0 / 24.6, // about 50 widgets visible
-      children: generateList(
-        new Container(child: const Placeholder()),
-        impliedMode: impliedMode,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new GridView.count(
+          addAutomaticKeepAlives: impliedMode,
+          addRepaintBoundaries: impliedMode,
+          crossAxisCount: 2,
+          childAspectRatio: 400.0 / 24.6, // about 50 widgets visible
+          children: generateList(
+            new Container(child: const Placeholder()),
+            impliedMode: impliedMode,
+          ),
+        ),
       ),
-    ));
+    );
     expect(find.byKey(const GlobalObjectKey<_LeafState>(3)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(30)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(59)), findsNothing);
@@ -196,36 +211,38 @@ void main() {
   group('Implied automatic keep-alive', () { tests(impliedMode: true); });
 
   testWidgets('AutomaticKeepAlive double', (WidgetTester tester) async {
-    await tester.pumpWidget(new Directionality(
-      textDirection: TextDirection.ltr,
-      child: new ListView(
-        addAutomaticKeepAlives: false,
-        addRepaintBoundaries: false,
-        children: <Widget>[
-          new AutomaticKeepAlive(
-            child: new Container(
-              height: 400.0,
-              child: new Row(children: <Widget>[
-                new Leaf(key: const GlobalObjectKey<_LeafState>(0), child: const Placeholder()),
-                new Leaf(key: const GlobalObjectKey<_LeafState>(1), child: const Placeholder()),
-              ]),
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          addAutomaticKeepAlives: false,
+          addRepaintBoundaries: false,
+          children: <Widget>[
+            new AutomaticKeepAlive(
+              child: new Container(
+                height: 400.0,
+                child: new Row(children: <Widget>[
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(0), child: const Placeholder()),
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(1), child: const Placeholder()),
+                ]),
+              ),
             ),
-          ),
-          new AutomaticKeepAlive(
-            child: new Container(
-              key: const GlobalObjectKey<_LeafState>(2),
-              height: 400.0,
+            new AutomaticKeepAlive(
+              child: new Container(
+                key: const GlobalObjectKey<_LeafState>(2),
+                height: 400.0,
+              ),
             ),
-          ),
-          new AutomaticKeepAlive(
-            child: new Container(
-              key: const GlobalObjectKey<_LeafState>(3),
-              height: 400.0,
+            new AutomaticKeepAlive(
+              child: new Container(
+                key: const GlobalObjectKey<_LeafState>(3),
+                height: 400.0,
+              ),
             ),
-          ),
-        ],
+          ],
+        ),
       ),
-    ));
+    );
     expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);
@@ -270,42 +287,44 @@ void main() {
   });
 
   testWidgets('AutomaticKeepAlive double', (WidgetTester tester) async {
-    await tester.pumpWidget(new Directionality(
-      textDirection: TextDirection.ltr,
-      child: new ListView(
-        addAutomaticKeepAlives: false,
-        addRepaintBoundaries: false,
-        children: <Widget>[
-          new AutomaticKeepAlive(
-            child: new Container(
-              height: 400.0,
-              child: new Row(children: <Widget>[
-                new Leaf(key: const GlobalObjectKey<_LeafState>(0), child: const Placeholder()),
-                new Leaf(key: const GlobalObjectKey<_LeafState>(1), child: const Placeholder()),
-              ]),
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          addAutomaticKeepAlives: false,
+          addRepaintBoundaries: false,
+          children: <Widget>[
+            new AutomaticKeepAlive(
+              child: new Container(
+                height: 400.0,
+                child: new Row(children: <Widget>[
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(0), child: const Placeholder()),
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(1), child: const Placeholder()),
+                ]),
+              ),
             ),
-          ),
-          new AutomaticKeepAlive(
-            child: new Container(
-              height: 400.0,
-              child: new Row(children: <Widget>[
-                new Leaf(key: const GlobalObjectKey<_LeafState>(2), child: const Placeholder()),
-                new Leaf(key: const GlobalObjectKey<_LeafState>(3), child: const Placeholder()),
-              ]),
+            new AutomaticKeepAlive(
+              child: new Container(
+                height: 400.0,
+                child: new Row(children: <Widget>[
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(2), child: const Placeholder()),
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(3), child: const Placeholder()),
+                ]),
+              ),
             ),
-          ),
-          new AutomaticKeepAlive(
-            child: new Container(
-              height: 400.0,
-              child: new Row(children: <Widget>[
-                new Leaf(key: const GlobalObjectKey<_LeafState>(4), child: const Placeholder()),
-                new Leaf(key: const GlobalObjectKey<_LeafState>(5), child: const Placeholder()),
-              ]),
+            new AutomaticKeepAlive(
+              child: new Container(
+                height: 400.0,
+                child: new Row(children: <Widget>[
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(4), child: const Placeholder()),
+                  new Leaf(key: const GlobalObjectKey<_LeafState>(5), child: const Placeholder()),
+                ]),
+              ),
             ),
-          ),
-        ],
+          ],
+        ),
       ),
-    ));
+    );
     expect(find.byKey(const GlobalObjectKey<_LeafState>(0)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(1)), findsOneWidget);
     expect(find.byKey(const GlobalObjectKey<_LeafState>(2)), findsOneWidget);

packages/flutter/test/widgets/box_sliver_mismatch_test.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 void main() {
@@ -33,24 +34,28 @@ void main() {
 
   testWidgets('Box in a sliver', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new CustomScrollView(
+      new Viewport(
+        crossAxisDirection: AxisDirection.right,
+        offset: new ViewportOffset.zero(),
         slivers: <Widget>[
           const SizedBox(),
         ],
-      )
+      ),
     );
 
     expect(tester.takeException(), isFlutterError);
 
     await tester.pumpWidget(
-      new CustomScrollView(
+      new Viewport(
+        crossAxisDirection: AxisDirection.right,
+        offset: new ViewportOffset.zero(),
         slivers: <Widget>[
           const SliverPadding(
             padding: EdgeInsets.zero,
             sliver: const SizedBox(),
           ),
         ],
-      )
+      ),
     );
 
     expect(tester.takeException(), isFlutterError);

packages/flutter/test/widgets/center_test.dart

@@ -7,6 +7,11 @@ import 'package:flutter/widgets.dart';
 
 void main() {
   testWidgets('Can be placed in an infinite box', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(children: <Widget>[const Center()]));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(children: <Widget>[const Center()])
+      ),
+    );
   });
 }

packages/flutter/test/widgets/container_test.dart

@@ -135,6 +135,11 @@ void main() {
   });
 
   testWidgets('Can be placed in an infinite box', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(children: <Widget>[new Container()]));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(children: <Widget>[new Container()]),
+      ),
+    );
   });
 }

packages/flutter/test/widgets/date_picker_test.dart

@@ -9,19 +9,22 @@ void main() {
   testWidgets('Can select a day', (WidgetTester tester) async {
     DateTime currentValue;
 
-    final Widget widget = new Material(
-      child: new ListView(
-        children: <Widget>[
-          new MonthPicker(
-            selectedDate: new DateTime.utc(2015, 6, 9, 7, 12),
-            firstDate: new DateTime.utc(2013),
-            lastDate: new DateTime.utc(2018),
-            onChanged: (DateTime dateTime) {
-              currentValue = dateTime;
-            }
-          )
-        ]
-      )
+    final Widget widget = new Directionality(
+      textDirection: TextDirection.ltr,
+      child: new Material(
+        child: new ListView(
+          children: <Widget>[
+            new MonthPicker(
+              selectedDate: new DateTime.utc(2015, 6, 9, 7, 12),
+              firstDate: new DateTime.utc(2013),
+              lastDate: new DateTime.utc(2018),
+              onChanged: (DateTime dateTime) {
+                currentValue = dateTime;
+              },
+            ),
+          ],
+        ),
+      ),
     );
 
     await tester.pumpWidget(widget);

packages/flutter/test/widgets/ensure_visible_test.dart

@@ -387,29 +387,34 @@ void main() {
         );
       }
 
-      await tester.pumpWidget(new Center(
-        child: new SizedBox(
-          width: 600.0,
-          height: 400.0,
-          child: new Scrollable(
-            viewportBuilder: (BuildContext context, ViewportOffset offset) {
-              return new Viewport(
-                offset: offset,
-                center: const ValueKey<int>(4),
-                slivers: <Widget>[
-                  buildSliver(0),
-                  buildSliver(1),
-                  buildSliver(2),
-                  buildSliver(3),
-                  buildSliver(4),
-                  buildSliver(5),
-                  buildSliver(6),
-                ],
-              );
-            },
+      await tester.pumpWidget(
+        new Directionality(
+          textDirection: TextDirection.ltr,
+          child: new Center(
+            child: new SizedBox(
+              width: 600.0,
+              height: 400.0,
+              child: new Scrollable(
+                viewportBuilder: (BuildContext context, ViewportOffset offset) {
+                  return new Viewport(
+                    offset: offset,
+                    center: const ValueKey<int>(4),
+                    slivers: <Widget>[
+                      buildSliver(0),
+                      buildSliver(1),
+                      buildSliver(2),
+                      buildSliver(3),
+                      buildSliver(4),
+                      buildSliver(5),
+                      buildSliver(6),
+                    ],
+                  );
+                },
+              ),
+            ),
           ),
         ),
-      ));
+      );
 
       await prepare(-125.0);
       Scrollable.ensureVisible(findContext(3));
@@ -628,35 +633,40 @@ void main() {
         await tester.pump();
       }
 
-      await tester.pumpWidget(new Center(
-        child: new SizedBox(
-          width: 600.0,
-          height: 400.0,
-          child: new Scrollable(
-            viewportBuilder: (BuildContext context, ViewportOffset offset) {
-              return new Viewport(
-                offset: offset,
-                center: const ValueKey<String>('center'),
-                slivers: <Widget>[
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-6), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-5), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-4), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-3), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-2), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-1), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(0), width: 200.0, height: 200.0), key: const ValueKey<String>('center')),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(1), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(2), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(3), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(4), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(5), width: 200.0, height: 200.0)),
-                  new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(6), width: 200.0, height: 200.0)),
-                ],
-              );
-            },
+      await tester.pumpWidget(
+        new Directionality(
+          textDirection: TextDirection.ltr,
+          child: new Center(
+            child: new SizedBox(
+              width: 600.0,
+              height: 400.0,
+              child: new Scrollable(
+                viewportBuilder: (BuildContext context, ViewportOffset offset) {
+                  return new Viewport(
+                    offset: offset,
+                    center: const ValueKey<String>('center'),
+                    slivers: <Widget>[
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-6), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-5), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-4), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-3), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-2), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(-1), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(0), width: 200.0, height: 200.0), key: const ValueKey<String>('center')),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(1), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(2), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(3), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(4), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(5), width: 200.0, height: 200.0)),
+                      new SliverToBoxAdapter(child: new Container(key: const ValueKey<int>(6), width: 200.0, height: 200.0)),
+                    ],
+                  );
+                },
+              ),
+            ),
           ),
         ),
-      ));
+      );
 
       await prepare(480.0);
       Scrollable.ensureVisible(findContext(3));

packages/flutter/test/widgets/form_test.dart

@@ -118,20 +118,23 @@ void main() {
     String errorText(String input) => fieldKey.currentState.value?.toString() + '/error';
 
     Widget builder() {
-      return new Center(
-        child: new Material(
-          child: new Form(
-            key: formKey,
-            autovalidate: true,
-            child: new ListView(
-              children: <Widget>[
-                new TextFormField(
-                  key: fieldKey,
-                ),
-                new TextFormField(
-                  validator: errorText,
-                ),
-              ],
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new Material(
+            child: new Form(
+              key: formKey,
+              autovalidate: true,
+              child: new ListView(
+                children: <Widget>[
+                  new TextFormField(
+                    key: fieldKey,
+                  ),
+                  new TextFormField(
+                    validator: errorText,
+                  ),
+                ],
+              ),
             ),
           ),
         ),

packages/flutter/test/widgets/grid_view_layout_test.dart

@@ -14,16 +14,21 @@ void main() {
       const DecoratedBox(decoration: const BoxDecoration()),
     ];
 
-    await tester.pumpWidget(new Center(
-      child: new Container(
-        width: 200.0,
-        child: new GridView.extent(
-          maxCrossAxisExtent: 100.0,
-          shrinkWrap: true,
-          children: children,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new Container(
+            width: 200.0,
+            child: new GridView.extent(
+              maxCrossAxisExtent: 100.0,
+              shrinkWrap: true,
+              children: children,
+            ),
+          ),
         ),
       ),
-    ));
+    );
 
     expect(tester.renderObjectList<RenderBox>(find.byType(DecoratedBox)), hasLength(4));
 
@@ -38,16 +43,21 @@ void main() {
 
     expect(grid.debugNeedsLayout, false);
 
-    await tester.pumpWidget(new Center(
-      child: new Container(
-        width: 200.0,
-        child: new GridView.extent(
-          maxCrossAxisExtent: 60.0,
-          shrinkWrap: true,
-          children: children,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new Container(
+            width: 200.0,
+            child: new GridView.extent(
+              maxCrossAxisExtent: 60.0,
+              shrinkWrap: true,
+              children: children,
+            ),
+          ),
         ),
       ),
-    ));
+    );
 
     for (RenderBox box in tester.renderObjectList<RenderBox>(find.byType(DecoratedBox))) {
       expect(box.size.width, equals(50.0), reason: "child width");

packages/flutter/test/widgets/linked_scroll_view_test.dart

@@ -282,80 +282,83 @@ class _TestState extends State<Test> {
 
   @override
   Widget build(BuildContext context) {
-    return new Column(
-      children: <Widget>[
-        new Expanded(
-          child: new ListView(
-            controller: _beforeController,
-            children: <Widget>[
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF90F090),
-                child: const Center(child: const Text('Hello A')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF90F090),
-                child: const Center(child: const Text('Hello B')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF90F090),
-                child: const Center(child: const Text('Hello C')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF90F090),
-                child: const Center(child: const Text('Hello D')),
-              ),
-            ],
+    return new Directionality(
+      textDirection: TextDirection.ltr,
+      child: new Column(
+        children: <Widget>[
+          new Expanded(
+            child: new ListView(
+              controller: _beforeController,
+              children: <Widget>[
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF90F090),
+                  child: const Center(child: const Text('Hello A')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF90F090),
+                  child: const Center(child: const Text('Hello B')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF90F090),
+                  child: const Center(child: const Text('Hello C')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF90F090),
+                  child: const Center(child: const Text('Hello D')),
+                ),
+              ],
+            ),
           ),
-        ),
-        const Divider(),
-        new Expanded(
-          child: new ListView(
-            controller: _afterController,
-            children: <Widget>[
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF9090F0),
-                child: const Center(child: const Text('Hello 1')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF9090F0),
-                child: const Center(child: const Text('Hello 2')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF9090F0),
-                child: const Center(child: const Text('Hello 3')),
-              ),
-              new Container(
-                margin: const EdgeInsets.all(8.0),
-                padding: const EdgeInsets.all(8.0),
-                height: 250.0,
-                color: const Color(0xFF9090F0),
-                child: const Center(child: const Text('Hello 4')),
-              ),
-            ],
+          const Divider(),
+          new Expanded(
+            child: new ListView(
+              controller: _afterController,
+              children: <Widget>[
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF9090F0),
+                  child: const Center(child: const Text('Hello 1')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF9090F0),
+                  child: const Center(child: const Text('Hello 2')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF9090F0),
+                  child: const Center(child: const Text('Hello 3')),
+                ),
+                new Container(
+                  margin: const EdgeInsets.all(8.0),
+                  padding: const EdgeInsets.all(8.0),
+                  height: 250.0,
+                  color: const Color(0xFF9090F0),
+                  child: const Center(child: const Text('Hello 4')),
+                ),
+              ],
+            ),
           ),
-        ),
-      ],
+        ],
+      ),
     );
   }
 }

packages/flutter/test/widgets/list_view_builder_test.dart

@@ -15,19 +15,22 @@ void main() {
     // so if our widget is 100 pixels tall, it should fit exactly 6 times.
 
     Widget builder() {
-      return new FlipWidget(
-        left: new ListView.builder(
-          itemExtent: 100.0,
-          itemBuilder: (BuildContext context, int index) {
-            callbackTracker.add(index);
-            return new Container(
-              key: new ValueKey<int>(index),
-              height: 100.0,
-              child: new Text('$index'),
-            );
-          },
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new FlipWidget(
+          left: new ListView.builder(
+            itemExtent: 100.0,
+            itemBuilder: (BuildContext context, int index) {
+              callbackTracker.add(index);
+              return new Container(
+                key: new ValueKey<int>(index),
+                height: 100.0,
+                child: new Text('$index'),
+              );
+            },
+          ),
+          right: const Text('Not Today'),
         ),
-        right: const Text('Not Today'),
       );
     }
 
@@ -67,14 +70,17 @@ void main() {
       );
     };
 
-    FlipWidget buildWidget() {
-      return new FlipWidget(
-        left: new ListView.builder(
-          controller: new ScrollController(initialScrollOffset: 300.0),
-          itemExtent: 200.0,
-          itemBuilder: itemBuilder,
+    Widget buildWidget() {
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new FlipWidget(
+          left: new ListView.builder(
+            controller: new ScrollController(initialScrollOffset: 300.0),
+            itemExtent: 200.0,
+            itemBuilder: itemBuilder,
+          ),
+          right: const Text('Not Today')
         ),
-        right: const Text('Not Today')
       );
     }
 
@@ -187,10 +193,13 @@ void main() {
       return new Text('$index', key: new ValueKey<int>(index));
     };
 
-    final Widget testWidget = new ListView.builder(
-      itemBuilder: itemBuilder,
-      itemExtent: 300.0,
-      itemCount: 10,
+    final Widget testWidget = new Directionality(
+      textDirection: TextDirection.ltr,
+      child: new ListView.builder(
+        itemBuilder: itemBuilder,
+        itemExtent: 300.0,
+        itemCount: 10,
+      ),
     );
 
     void jumpTo(double newScrollOffset) {

packages/flutter/test/widgets/list_view_correction_test.dart

@@ -8,34 +8,44 @@ import 'package:flutter/material.dart';
 void main() {
   testWidgets('ListView can handle shrinking top elements', (WidgetTester tester) async {
     final ScrollController controller = new ScrollController();
-    await tester.pumpWidget(new ListView(
-      controller: controller,
-      children: <Widget>[
-        new Container(height: 400.0, child: const Text('1')),
-        new Container(height: 400.0, child: const Text('2')),
-        new Container(height: 400.0, child: const Text('3')),
-        new Container(height: 400.0, child: const Text('4')),
-        new Container(height: 400.0, child: const Text('5')),
-        new Container(height: 400.0, child: const Text('6')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[
+            new Container(height: 400.0, child: const Text('1')),
+            new Container(height: 400.0, child: const Text('2')),
+            new Container(height: 400.0, child: const Text('3')),
+            new Container(height: 400.0, child: const Text('4')),
+            new Container(height: 400.0, child: const Text('5')),
+            new Container(height: 400.0, child: const Text('6')),
+          ],
+        ),
+      ),
+    );
 
     controller.jumpTo(1000.0);
     await tester.pump();
 
     expect(tester.getTopLeft(find.text('4')).dy, equals(200.0));
 
-    await tester.pumpWidget(new ListView(
-      controller: controller,
-      children: <Widget>[
-        new Container(height: 200.0, child: const Text('1')),
-        new Container(height: 400.0, child: const Text('2')),
-        new Container(height: 400.0, child: const Text('3')),
-        new Container(height: 400.0, child: const Text('4')),
-        new Container(height: 400.0, child: const Text('5')),
-        new Container(height: 400.0, child: const Text('6')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[
+            new Container(height: 200.0, child: const Text('1')),
+            new Container(height: 400.0, child: const Text('2')),
+            new Container(height: 400.0, child: const Text('3')),
+            new Container(height: 400.0, child: const Text('4')),
+            new Container(height: 400.0, child: const Text('5')),
+            new Container(height: 400.0, child: const Text('6')),
+          ],
+        ),
+      ),
+    );
 
     expect(controller.offset, equals(1000.0));
     expect(tester.getTopLeft(find.text('4')).dy, equals(200.0));
@@ -55,15 +65,20 @@ void main() {
 
   testWidgets('ListView can handle inserts at 0', (WidgetTester tester) async {
     final ScrollController controller = new ScrollController();
-    await tester.pumpWidget(new ListView(
-      controller: controller,
-      children: <Widget>[
-        new Container(height: 400.0, child: const Text('0')),
-        new Container(height: 400.0, child: const Text('1')),
-        new Container(height: 400.0, child: const Text('2')),
-        new Container(height: 400.0, child: const Text('3')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[
+            new Container(height: 400.0, child: const Text('0')),
+            new Container(height: 400.0, child: const Text('1')),
+            new Container(height: 400.0, child: const Text('2')),
+            new Container(height: 400.0, child: const Text('3')),
+          ],
+        ),
+      ),
+    );
     expect(find.text('0'), findsOneWidget);
     expect(find.text('1'), findsOneWidget);
     expect(find.text('2'), findsNothing);
@@ -71,17 +86,22 @@ void main() {
 
     final Finder findItemA = find.descendant(of: find.byType(Container), matching: find.text('A'));
     final Finder findItemB = find.descendant(of: find.byType(Container), matching: find.text('B'));
-    await tester.pumpWidget(new ListView(
-      controller: controller,
-      children: <Widget>[
-        new Container(height: 10.0, child: const Text('A')),
-        new Container(height: 10.0, child: const Text('B')),
-        new Container(height: 400.0, child: const Text('0')),
-        new Container(height: 400.0, child: const Text('1')),
-        new Container(height: 400.0, child: const Text('2')),
-        new Container(height: 400.0, child: const Text('3')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[
+            new Container(height: 10.0, child: const Text('A')),
+            new Container(height: 10.0, child: const Text('B')),
+            new Container(height: 400.0, child: const Text('0')),
+            new Container(height: 400.0, child: const Text('1')),
+            new Container(height: 400.0, child: const Text('2')),
+            new Container(height: 400.0, child: const Text('3')),
+          ],
+        ),
+      ),
+    );
     expect(find.text('A'), findsOneWidget);
     expect(find.text('B'), findsOneWidget);
     expect(tester.getTopLeft(findItemA).dy, 0.0);
@@ -95,17 +115,22 @@ void main() {
     expect(find.text('A'), findsNothing);
     expect(find.text('B'), findsNothing);
 
-    await tester.pumpWidget(new ListView(
-      controller: controller,
-      children: <Widget>[
-        new Container(height: 200.0, child: const Text('A')),
-        new Container(height: 200.0, child: const Text('B')),
-        new Container(height: 400.0, child: const Text('0')),
-        new Container(height: 400.0, child: const Text('1')),
-        new Container(height: 400.0, child: const Text('2')),
-        new Container(height: 400.0, child: const Text('3')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[
+            new Container(height: 200.0, child: const Text('A')),
+            new Container(height: 200.0, child: const Text('B')),
+            new Container(height: 400.0, child: const Text('0')),
+            new Container(height: 400.0, child: const Text('1')),
+            new Container(height: 400.0, child: const Text('2')),
+            new Container(height: 400.0, child: const Text('3')),
+          ],
+        ),
+      ),
+    );
     expect(find.text('A'), findsNothing);
     expect(find.text('B'), findsNothing);
 

packages/flutter/test/widgets/list_view_fling_test.dart

@@ -10,11 +10,16 @@ const double kFlingOffset = kHeight * 20.0;
 
 void main() {
   testWidgets('Flings don\'t stutter', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView.builder(
-      itemBuilder: (BuildContext context, int index) {
-        return new Container(height: kHeight);
-      },
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.builder(
+          itemBuilder: (BuildContext context, int index) {
+            return new Container(height: kHeight);
+          },
+        ),
+      ),
+    );
 
     double getCurrentOffset() {
       return tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels;

packages/flutter/test/widgets/list_view_misc_test.dart

@@ -11,15 +11,18 @@ final Key blockKey = const Key('test');
 void main() {
   testWidgets('Cannot scroll a non-overflowing block', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new ListView(
-        key: blockKey,
-        children: <Widget>[
-          new Container(
-            height: 200.0, // less than 600, the height of the test area
-            child: const Text('Hello')
-          )
-        ]
-      )
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          key: blockKey,
+          children: <Widget>[
+            new Container(
+              height: 200.0, // less than 600, the height of the test area
+              child: const Text('Hello'),
+            ),
+          ],
+        ),
+      ),
     );
 
     final Offset middleOfContainer = tester.getCenter(find.text('Hello'));
@@ -36,15 +39,18 @@ void main() {
 
   testWidgets('Can scroll an overflowing block', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new ListView(
-        key: blockKey,
-        children: <Widget>[
-          new Container(
-            height: 2000.0, // more than 600, the height of the test area
-            child: const Text('Hello')
-          )
-        ]
-      )
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          key: blockKey,
+          children: <Widget>[
+            new Container(
+              height: 2000.0, // more than 600, the height of the test area
+              child: const Text('Hello'),
+            ),
+          ],
+        ),
+      ),
     );
 
     final Offset middleOfContainer = tester.getCenter(find.text('Hello'));
@@ -67,25 +73,28 @@ void main() {
     int second = 0;
 
     Widget buildBlock({ bool reverse: false }) {
-      return new ListView(
-        key: new UniqueKey(),
-        reverse: reverse,
-        children: <Widget>[
-          new GestureDetector(
-            onTap: () { first += 1; },
-            child: new Container(
-              height: 350.0, // more than half the height of the test area
-              color: const Color(0xFF00FF00),
-            )
-          ),
-          new GestureDetector(
-            onTap: () { second += 1; },
-            child: new Container(
-              height: 350.0, // more than half the height of the test area
-              color: const Color(0xFF0000FF),
-            )
-          )
-        ]
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          key: new UniqueKey(),
+          reverse: reverse,
+          children: <Widget>[
+            new GestureDetector(
+              onTap: () { first += 1; },
+              child: new Container(
+                height: 350.0, // more than half the height of the test area
+                color: const Color(0xFF00FF00),
+              )
+            ),
+            new GestureDetector(
+              onTap: () { second += 1; },
+              child: new Container(
+                height: 350.0, // more than half the height of the test area
+                color: const Color(0xFF0000FF),
+              ),
+            ),
+          ],
+        ),
       );
     }
 
@@ -107,9 +116,12 @@ void main() {
     final ScrollController controller = new ScrollController();
 
     Widget buildBlock() {
-      return new ListView(
-        controller: controller,
-        children: <Widget>[const Text("A"), const Text("B"), const Text("C")]
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: controller,
+          children: <Widget>[const Text("A"), const Text("B"), const Text("C")],
+        ),
       );
     }
     await tester.pumpWidget(buildBlock());
@@ -125,13 +137,18 @@ void main() {
       new Container(),
     ]);
 
-    await tester.pumpWidget(new CustomScrollView(
-      slivers: <Widget>[
-        new SliverList(
-          delegate: delegate,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          slivers: <Widget>[
+            new SliverList(
+              delegate: delegate,
+            ),
+          ],
         ),
-      ],
-    ));
+      ),
+    );
 
     final SliverMultiBoxAdaptorElement element = tester.element(find.byType(SliverList));
 
@@ -154,42 +171,45 @@ void main() {
 
     // The overall height of the frame is (as ever) 600
     Widget buildFrame() {
-      return new Column(
-        children: <Widget>[
-          new Flexible(
-            // The overall height of the ListView's contents is 500
-            child: new ListView(
-              children: <Widget>[
-                const SizedBox(
-                  height: 150.0,
-                  child: const Center(
-                    child: const Text('top')
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Column(
+          children: <Widget>[
+            new Flexible(
+              // The overall height of the ListView's contents is 500
+              child: new ListView(
+                children: <Widget>[
+                  const SizedBox(
+                    height: 150.0,
+                    child: const Center(
+                      child: const Text('top')
+                    ),
                   ),
-                ),
-                const SizedBox(
-                  height: 200.0,
-                  child: const Center(
-                    child: const Text('middle')
+                  const SizedBox(
+                    height: 200.0,
+                    child: const Center(
+                      child: const Text('middle')
+                    ),
                   ),
-                ),
-                const SizedBox(
-                  height: 150.0,
-                  child: const Center(
-                    child: const Text('bottom')
+                  const SizedBox(
+                    height: 150.0,
+                    child: const Center(
+                      child: const Text('bottom')
+                    ),
                   ),
-                ),
-              ],
+                ],
+              ),
             ),
-          ),
-          // If this widget's height is > 100 the ListView can scroll.
-          new SizeTransition(
-            sizeFactor: controller.view,
-            child: const SizedBox(
-              height: 300.0,
-              child: const Text('keyboard'),
+            // If this widget's height is > 100 the ListView can scroll.
+            new SizeTransition(
+              sizeFactor: controller.view,
+              child: const SizedBox(
+                height: 300.0,
+                child: const Text('keyboard'),
+              ),
             ),
-          ),
-        ],
+          ],
+        ),
       );
     }
 

packages/flutter/test/widgets/list_view_relayout_test.dart

@@ -8,118 +8,173 @@ import 'package:flutter/rendering.dart';
 
 void main() {
   testWidgets('Nested ListView with shrinkWrap', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      shrinkWrap: true,
-      children: <Widget>[
-        new ListView(
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
           shrinkWrap: true,
           children: <Widget>[
-            const Text('1'),
-            const Text('2'),
-            const Text('3'),
+            new ListView(
+              shrinkWrap: true,
+              children: <Widget>[
+                const Text('1'),
+                const Text('2'),
+                const Text('3'),
+              ],
+            ),
+            new ListView(
+              shrinkWrap: true,
+              children: <Widget>[
+                const Text('4'),
+                const Text('5'),
+                const Text('6'),
+              ],
+            ),
           ],
         ),
-        new ListView(
-          shrinkWrap: true,
-          children: <Widget>[
-            const Text('4'),
-            const Text('5'),
-            const Text('6'),
-          ],
-        ),
-      ],
-    ));
+      ),
+    );
   });
 
   testWidgets('Underflowing ListView should relayout for additional children', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/5950
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+          ],
+        ),
+      ),
+    );
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-        const SizedBox(height: 200.0, child: const Text('200')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+            const SizedBox(height: 200.0, child: const Text('200')),
+          ],
+        ),
+      ),
+    );
 
     expect(find.text('200'), findsOneWidget);
   });
 
   testWidgets('Underflowing ListView contentExtent should track additional children', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+          ],
+        ),
+      ),
+    );
 
     final RenderSliverList list = tester.renderObject(find.byType(SliverList));
     expect(list.geometry.scrollExtent, equals(100.0));
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-        const SizedBox(height: 200.0, child: const Text('200')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+            const SizedBox(height: 200.0, child: const Text('200')),
+          ],
+        ),
+      ),
+    );
     expect(list.geometry.scrollExtent, equals(300.0));
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[]
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[]
+        ),
+      ),
+    );
     expect(list.geometry.scrollExtent, equals(0.0));
   });
 
   testWidgets('Overflowing ListView should relayout for missing children', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 300.0, child: const Text('300')),
-        const SizedBox(height: 400.0, child: const Text('400')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 300.0, child: const Text('300')),
+            const SizedBox(height: 400.0, child: const Text('400')),
+          ],
+        ),
+      ),
+    );
 
     expect(find.text('300'), findsOneWidget);
     expect(find.text('400'), findsOneWidget);
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 300.0, child: const Text('300')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 300.0, child: const Text('300')),
+          ],
+        ),
+      ),
+    );
 
     expect(find.text('300'), findsOneWidget);
     expect(find.text('400'), findsNothing);
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[]
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[]
+        ),
+      ),
+    );
 
     expect(find.text('300'), findsNothing);
     expect(find.text('400'), findsNothing);
   });
 
   testWidgets('Overflowing ListView should not relayout for additional children', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 300.0, child: const Text('300')),
-        const SizedBox(height: 400.0, child: const Text('400')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 300.0, child: const Text('300')),
+            const SizedBox(height: 400.0, child: const Text('400')),
+          ],
+        ),
+      ),
+    );
 
     expect(find.text('300'), findsOneWidget);
     expect(find.text('400'), findsOneWidget);
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 300.0, child: const Text('300')),
-        const SizedBox(height: 400.0, child: const Text('400')),
-        const SizedBox(height: 100.0, child: const Text('100')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 300.0, child: const Text('300')),
+            const SizedBox(height: 400.0, child: const Text('400')),
+            const SizedBox(height: 100.0, child: const Text('100')),
+          ],
+        ),
+      ),
+    );
 
     expect(find.text('300'), findsOneWidget);
     expect(find.text('400'), findsOneWidget);
@@ -132,22 +187,32 @@ void main() {
     // When children are added that cause it to overflow, scrolling should
     // be enabled.
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+          ],
+        ),
+      ),
+    );
 
     final ScrollableState scrollable = tester.state(find.byType(Scrollable));
     expect(scrollable.position.maxScrollExtent, 0.0);
 
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        const SizedBox(height: 100.0, child: const Text('100')),
-        const SizedBox(height: 200.0, child: const Text('200')),
-        const SizedBox(height: 400.0, child: const Text('400')),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            const SizedBox(height: 100.0, child: const Text('100')),
+            const SizedBox(height: 200.0, child: const Text('200')),
+            const SizedBox(height: 400.0, child: const Text('400')),
+          ],
+        ),
+      ),
+    );
 
     expect(scrollable.position.maxScrollExtent, 100.0);
   });

packages/flutter/test/widgets/list_view_test.dart

@@ -18,18 +18,28 @@ class TestSliverChildListDelegate extends SliverChildListDelegate {
 
 void main() {
   testWidgets('ListView default control', (WidgetTester tester) async {
-    await tester.pumpWidget(new Center(child: new ListView(itemExtent: 100.0)));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new ListView(itemExtent: 100.0),
+        ),
+      ),
+    );
   });
 
   testWidgets('ListView itemExtent control test', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 200.0,
-        children: new List<Widget>.generate(20, (int i) {
-          return new Container(
-            child: new Text('$i'),
-          );
-        }),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 200.0,
+          children: new List<Widget>.generate(20, (int i) {
+            return new Container(
+              child: new Text('$i'),
+            );
+          }),
+        ),
       ),
     );
 
@@ -68,18 +78,21 @@ void main() {
     final List<int> log = <int>[];
 
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 200.0,
-        children: new List<Widget>.generate(20, (int i) {
-          return new Builder(
-            builder: (BuildContext context) {
-              log.add(i);
-              return new Container(
-                child: new Text('$i'),
-              );
-            }
-          );
-        }),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 200.0,
+          children: new List<Widget>.generate(20, (int i) {
+            return new Builder(
+              builder: (BuildContext context) {
+                log.add(i);
+                return new Container(
+                  child: new Text('$i'),
+                );
+              }
+            );
+          }),
+        ),
       ),
     );
 
@@ -107,8 +120,11 @@ void main() {
 
   testWidgets('ListView can build out of underflow', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 100.0,
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 100.0,
+        ),
       ),
     );
 
@@ -120,13 +136,16 @@ void main() {
     expect(find.text('5'), findsNothing);
 
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 100.0,
-        children: new List<Widget>.generate(2, (int i) {
-          return new Container(
-            child: new Text('$i'),
-          );
-        }),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 100.0,
+          children: new List<Widget>.generate(2, (int i) {
+            return new Container(
+              child: new Text('$i'),
+            );
+          }),
+        ),
       ),
     );
 
@@ -138,13 +157,16 @@ void main() {
     expect(find.text('5'), findsNothing);
 
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 100.0,
-        children: new List<Widget>.generate(5, (int i) {
-          return new Container(
-            child: new Text('$i'),
-          );
-        }),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 100.0,
+          children: new List<Widget>.generate(5, (int i) {
+            return new Container(
+              child: new Text('$i'),
+            );
+          }),
+        ),
       ),
     );
 
@@ -158,15 +180,18 @@ void main() {
 
   testWidgets('ListView can build out of overflow padding', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new Center(
-        child: new SizedBox(
-          width: 0.0,
-          height: 0.0,
-          child: new ListView(
-            padding: const EdgeInsets.all(8.0),
-            children: <Widget>[
-              const Text('padded'),
-            ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new SizedBox(
+            width: 0.0,
+            height: 0.0,
+            child: new ListView(
+              padding: const EdgeInsets.all(8.0),
+              children: <Widget>[
+                const Text('padded'),
+              ],
+            ),
           ),
         ),
       ),
@@ -176,15 +201,18 @@ void main() {
 
   testWidgets('ListView with itemExtent in unbounded context', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new SingleChildScrollView(
-        child: new ListView(
-          itemExtent: 100.0,
-          shrinkWrap: true,
-          children: new List<Widget>.generate(20, (int i) {
-            return new Container(
-              child: new Text('$i'),
-            );
-          }),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new SingleChildScrollView(
+          child: new ListView(
+            itemExtent: 100.0,
+            shrinkWrap: true,
+            children: new List<Widget>.generate(20, (int i) {
+              return new Container(
+                child: new Text('$i'),
+              );
+            }),
+          ),
         ),
       ),
     );
@@ -203,9 +231,12 @@ void main() {
     );
 
     await tester.pumpWidget(
-      new ListView.custom(
-        itemExtent: 110.0,
-        childrenDelegate: delegate,
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.custom(
+          itemExtent: 110.0,
+          childrenDelegate: delegate,
+        ),
       ),
     );
 
@@ -213,9 +244,12 @@ void main() {
     delegate.log.clear();
 
     await tester.pumpWidget(
-      new ListView.custom(
-        itemExtent: 210.0,
-        childrenDelegate: delegate,
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.custom(
+          itemExtent: 210.0,
+          childrenDelegate: delegate,
+        ),
       ),
     );
 

packages/flutter/test/widgets/list_view_vertical_test.dart

@@ -8,14 +8,17 @@ import 'package:flutter/widgets.dart';
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 
 Widget buildFrame() {
-  return new ListView(
-    itemExtent: 290.0,
-    scrollDirection: Axis.vertical,
-    children: items.map((int item) {
-      return new Container(
-        child: new Text('$item')
-      );
-    }).toList(),
+  return new Directionality(
+    textDirection: TextDirection.ltr,
+    child: new ListView(
+      itemExtent: 290.0,
+      scrollDirection: Axis.vertical,
+      children: items.map((int item) {
+        return new Container(
+          child: new Text('$item')
+        );
+      }).toList(),
+    ),
   );
 }
 
@@ -65,15 +68,18 @@ void main() {
 
   testWidgets('Drag vertically', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new ListView(
-        itemExtent: 290.0,
-        padding: const EdgeInsets.only(top: 250.0),
-        scrollDirection: Axis.vertical,
-        children: items.map((int item) {
-          return new Container(
-            child: new Text('$item')
-          );
-        }).toList(),
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 290.0,
+          padding: const EdgeInsets.only(top: 250.0),
+          scrollDirection: Axis.vertical,
+          children: items.map((int item) {
+            return new Container(
+              child: new Text('$item')
+            );
+          }).toList(),
+        ),
       ),
     );
 

packages/flutter/test/widgets/list_view_viewporting_test.dart

@@ -16,18 +16,21 @@ void main() {
     // so if our widget is 100 pixels tall, it should fit exactly 6 times.
 
     Widget builder() {
-      return new FlipWidget(
-        left: new ListView.builder(
-          itemBuilder: (BuildContext context, int index) {
-            callbackTracker.add(index);
-            return new Container(
-              key: new ValueKey<int>(index),
-              height: 100.0,
-              child: new Text("$index"),
-            );
-          },
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new FlipWidget(
+          left: new ListView.builder(
+            itemBuilder: (BuildContext context, int index) {
+              callbackTracker.add(index);
+              return new Container(
+                key: new ValueKey<int>(index),
+                height: 100.0,
+                child: new Text("$index"),
+              );
+            },
+          ),
+          right: const Text('Not Today'),
         ),
-        right: const Text('Not Today'),
       );
     }
 
@@ -68,12 +71,15 @@ void main() {
     };
 
     Widget builder() {
-      return new FlipWidget(
-        left: new ListView.builder(
-          controller: new ScrollController(initialScrollOffset: 300.0),
-          itemBuilder: itemBuilder,
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new FlipWidget(
+          left: new ListView.builder(
+            controller: new ScrollController(initialScrollOffset: 300.0),
+            itemBuilder: itemBuilder,
+          ),
+          right: const Text('Not Today'),
         ),
-        right: const Text('Not Today'),
       );
     }
 
@@ -173,8 +179,11 @@ void main() {
     }
 
     Widget builder() {
-      return new ListView.builder(
-        itemBuilder: itemBuilder,
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.builder(
+          itemBuilder: itemBuilder,
+        ),
       );
     }
 
@@ -214,12 +223,15 @@ void main() {
     );
 
     await tester.pumpWidget(
-      new StatefulBuilder(
-        builder: (BuildContext context, StateSetter setter) {
-          setState = setter;
-          return new Theme(data: themeData, child: viewport);
-        }
-      )
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new StatefulBuilder(
+          builder: (BuildContext context, StateSetter setter) {
+            setState = setter;
+            return new Theme(data: themeData, child: viewport);
+          },
+        ),
+      ),
     );
 
     DecoratedBox widget = tester.firstWidget(find.byType(DecoratedBox));
@@ -249,9 +261,12 @@ void main() {
     };
 
     await tester.pumpWidget(
-      new ListView.builder(
-        padding: const EdgeInsets.fromLTRB(7.0, 3.0, 5.0, 11.0),
-        itemBuilder: itemBuilder,
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.builder(
+          padding: const EdgeInsets.fromLTRB(7.0, 3.0, 5.0, 11.0),
+          itemBuilder: itemBuilder,
+        ),
       ),
     );
 
@@ -262,14 +277,19 @@ void main() {
   });
 
   testWidgets('ListView underflow extents', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      addAutomaticKeepAlives: false,
-      children: <Widget>[
-        new Container(height: 100.0),
-        new Container(height: 100.0),
-        new Container(height: 100.0),
-      ],
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          addAutomaticKeepAlives: false,
+          children: <Widget>[
+            new Container(height: 100.0),
+            new Container(height: 100.0),
+            new Container(height: 100.0),
+          ],
+        ),
+      ),
+    );
 
     final RenderSliverList list = tester.renderObject(find.byType(SliverList));
 
@@ -294,6 +314,7 @@ void main() {
         ' │ constraints: SliverConstraints(AxisDirection.down,\n'
         ' │   GrowthDirection.forward, ScrollDirection.idle, scrollOffset:\n'
         ' │   0.0, remainingPaintExtent: 600.0, crossAxisExtent: 800.0,\n'
+        ' │   crossAxisDirection: AxisDirection.right,\n'
         ' │   viewportMainAxisExtent: 600.0)\n'
         ' │ geometry: SliverGeometry(scrollExtent: 300.0, paintExtent: 300.0,\n'
         ' │   maxPaintExtent: 300.0)\n'
@@ -453,7 +474,7 @@ void main() {
         '           parentData: <none> (can use size)\n'
         '           constraints: BoxConstraints(w=800.0, h=100.0)\n'
         '           size: Size(800.0, 100.0)\n'
-        '           additionalConstraints: BoxConstraints(biggest)\n',
+        '           additionalConstraints: BoxConstraints(biggest)\n'
       ),
     );
 

packages/flutter/test/widgets/list_view_with_inherited_test.dart

@@ -21,8 +21,11 @@ Widget buildCard(BuildContext context, int index) {
 }
 
 Widget buildFrame() {
-  return new ListView.builder(
-    itemBuilder: buildCard,
+  return new Directionality(
+    textDirection: TextDirection.ltr,
+    child: new ListView.builder(
+      itemBuilder: buildCard,
+    ),
   );
 }
 

packages/flutter/test/widgets/listview_end_append_test.dart

@@ -10,10 +10,13 @@ void main() {
     // Regression test for https://github.com/flutter/flutter/issues/9506
 
     Widget buildFrame(int itemCount) {
-      return new ListView.builder(
-        itemExtent: 200.0,
-        itemCount: itemCount,
-        itemBuilder: (BuildContext context, int index) => new Text('item $index'),
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.builder(
+          itemExtent: 200.0,
+          itemCount: itemCount,
+          itemBuilder: (BuildContext context, int index) => new Text('item $index'),
+        ),
       );
     }
 
@@ -34,14 +37,17 @@ void main() {
     // Regression test for https://github.com/flutter/flutter/issues/9506
 
     Widget buildFrame(int itemCount) {
-      return new ListView.builder(
-        itemCount: itemCount,
-        itemBuilder: (BuildContext context, int index) {
-          return new SizedBox(
-            height: 200.0,
-            child: new Text('item $index'),
-          );
-        },
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView.builder(
+          itemCount: itemCount,
+          itemBuilder: (BuildContext context, int index) {
+            return new SizedBox(
+              height: 200.0,
+              child: new Text('item $index'),
+            );
+          },
+        ),
       );
     }
 

packages/flutter/test/widgets/overscroll_indicator_test.dart

@@ -24,10 +24,13 @@ Future<Null> slowDrag(WidgetTester tester, Offset start, Offset offset) async {
 void main() {
   testWidgets('Overscroll indicator color', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new CustomScrollView(
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
+          ],
+        ),
       ),
     );
     final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -57,10 +60,13 @@ void main() {
 
   testWidgets('Overscroll indicator changes side when you drag on the other side', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new CustomScrollView(
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
+          ],
+        ),
       ),
     );
     final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -92,10 +98,13 @@ void main() {
 
   testWidgets('Overscroll indicator changes side when you shift sides', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new CustomScrollView(
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 2000.0)),
+          ],
+        ),
       ),
     );
     final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -125,11 +134,14 @@ void main() {
   group('Flipping direction of scrollable doesn\'t change overscroll behavior', () {
     testWidgets('down', (WidgetTester tester) async {
       await tester.pumpWidget(
-        new CustomScrollView(
-          physics: const AlwaysScrollableScrollPhysics(),
-          slivers: <Widget>[
-            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-          ],
+        new Directionality(
+          textDirection: TextDirection.ltr,
+          child: new CustomScrollView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            slivers: <Widget>[
+              const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+            ],
+          ),
         ),
       );
       final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -142,12 +154,15 @@ void main() {
 
     testWidgets('up', (WidgetTester tester) async {
       await tester.pumpWidget(
-        new CustomScrollView(
-          reverse: true,
-          physics: const AlwaysScrollableScrollPhysics(),
-          slivers: <Widget>[
-            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-          ],
+        new Directionality(
+          textDirection: TextDirection.ltr,
+          child: new CustomScrollView(
+            reverse: true,
+            physics: const AlwaysScrollableScrollPhysics(),
+            slivers: <Widget>[
+              const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+            ],
+          ),
         ),
       );
       final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -161,11 +176,14 @@ void main() {
 
   testWidgets('Overscroll in both directions', (WidgetTester tester) async {
     await tester.pumpWidget(
-      new CustomScrollView(
-        physics: const AlwaysScrollableScrollPhysics(),
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          physics: const AlwaysScrollableScrollPhysics(),
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+          ],
+        ),
       ),
     );
     final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
@@ -180,16 +198,18 @@ void main() {
   });
 
   testWidgets('Overscroll horizontally', (WidgetTester tester) async {
-    await tester.pumpWidget(new Directionality(
-      textDirection: TextDirection.ltr,
-      child: new CustomScrollView(
-        scrollDirection: Axis.horizontal,
-        physics: const AlwaysScrollableScrollPhysics(),
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-        ],
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          scrollDirection: Axis.horizontal,
+          physics: const AlwaysScrollableScrollPhysics(),
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+          ],
+        ),
       ),
-    ));
+    );
     final RenderObject painter = tester.renderObject(find.byType(CustomPaint));
     await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
     expect(painter, paints..rotate(angle: math.PI / 2.0)..circle()..saveRestore());
@@ -227,39 +247,43 @@ void main() {
   testWidgets('Changing settings', (WidgetTester tester) async {
     RenderObject painter;
 
-    await tester.pumpWidget(new Directionality(
-      textDirection: TextDirection.ltr,
-      child: new ScrollConfiguration(
-        behavior: new TestScrollBehavior1(),
-        child: new CustomScrollView(
-          scrollDirection: Axis.horizontal,
-          physics: const AlwaysScrollableScrollPhysics(),
-          reverse: true,
-          slivers: <Widget>[
-            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-          ],
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ScrollConfiguration(
+          behavior: new TestScrollBehavior1(),
+          child: new CustomScrollView(
+            scrollDirection: Axis.horizontal,
+            physics: const AlwaysScrollableScrollPhysics(),
+            reverse: true,
+            slivers: <Widget>[
+              const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+            ],
+          ),
         ),
       ),
-    ));
+    );
     painter = tester.renderObject(find.byType(CustomPaint));
     await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
     expect(painter, paints..rotate(angle: math.PI / 2.0)..circle(color: const Color(0x0A00FF00)));
     expect(painter, isNot(paints..circle()..circle()));
 
     await tester.pumpAndSettle(const Duration(seconds: 1));
-    await tester.pumpWidget(new Directionality(
-      textDirection: TextDirection.ltr,
-      child: new ScrollConfiguration(
-        behavior: new TestScrollBehavior2(),
-        child: new CustomScrollView(
-          scrollDirection: Axis.horizontal,
-          physics: const AlwaysScrollableScrollPhysics(),
-          slivers: <Widget>[
-            const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
-          ],
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ScrollConfiguration(
+          behavior: new TestScrollBehavior2(),
+          child: new CustomScrollView(
+            scrollDirection: Axis.horizontal,
+            physics: const AlwaysScrollableScrollPhysics(),
+            slivers: <Widget>[
+              const SliverToBoxAdapter(child: const SizedBox(height: 20.0)),
+            ],
+          ),
         ),
       ),
-    ));
+    );
     painter = tester.renderObject(find.byType(CustomPaint));
     await slowDrag(tester, const Offset(200.0, 200.0), const Offset(5.0, 0.0));
     expect(painter, paints..rotate(angle: math.PI / 2.0)..circle(color: const Color(0x0A0000FF))..saveRestore());

packages/flutter/test/widgets/remember_scroll_position_test.dart

@@ -30,25 +30,30 @@ class ThePositiveNumbers extends StatelessWidget {
 
 Future<Null> performTest(WidgetTester tester, bool maintainState) async {
   final GlobalKey<NavigatorState> navigatorKey = new GlobalKey<NavigatorState>();
-  await tester.pumpWidget(new Navigator(
-    key: navigatorKey,
-    onGenerateRoute: (RouteSettings settings) {
-      if (settings.name == '/') {
-        return new MaterialPageRoute<Null>(
-          settings: settings,
-          builder: (_) => new Container(child: const ThePositiveNumbers(from: 0)),
-          maintainState: maintainState,
-        );
-      } else if (settings.name == '/second') {
-        return new MaterialPageRoute<Null>(
-          settings: settings,
-          builder: (_) => new Container(child: const ThePositiveNumbers(from: 10000)),
-          maintainState: maintainState,
-        );
-      }
-      return null;
-    }
-  ));
+  await tester.pumpWidget(
+    new Directionality(
+      textDirection: TextDirection.ltr,
+      child: new Navigator(
+        key: navigatorKey,
+        onGenerateRoute: (RouteSettings settings) {
+          if (settings.name == '/') {
+            return new MaterialPageRoute<Null>(
+              settings: settings,
+              builder: (_) => new Container(child: const ThePositiveNumbers(from: 0)),
+              maintainState: maintainState,
+            );
+          } else if (settings.name == '/second') {
+            return new MaterialPageRoute<Null>(
+              settings: settings,
+              builder: (_) => new Container(child: const ThePositiveNumbers(from: 10000)),
+              maintainState: maintainState,
+            );
+          }
+          return null;
+        }
+      ),
+    ),
+  );
 
   // we're 600 pixels high, each item is 100 pixels high, scroll position is
   // 110.0, so we should have 7 items, 1..7.

packages/flutter/test/widgets/reparent_state_test.dart

@@ -195,16 +195,21 @@ void main() {
     final StateMarkerState keyState = key.currentState;
     keyState.marker = "marked";
 
-    await tester.pumpWidget(new ListView(
-      itemExtent: 100.0,
-      children: <Widget>[
-        new Container(
-          key: const Key('container'),
-          height: 100.0,
-          child: new StateMarker(key: key),
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          itemExtent: 100.0,
+          children: <Widget>[
+            new Container(
+              key: const Key('container'),
+              height: 100.0,
+              child: new StateMarker(key: key),
+            ),
+          ],
         ),
-      ],
-    ));
+      ),
+    );
 
     expect(key.currentState, equals(keyState));
     expect(keyState.marker, equals("marked"));

packages/flutter/test/widgets/scroll_interaction_test.dart

@@ -7,11 +7,16 @@ import 'package:flutter/widgets.dart';
 
 void main() {
   testWidgets('Scroll flings twice in a row does not crash', (WidgetTester tester) async {
-    await tester.pumpWidget(new ListView(
-      children: <Widget>[
-        new Container(height: 100000.0)
-      ]
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: <Widget>[
+            new Container(height: 100000.0)
+          ],
+        ),
+      ),
+    );
 
     final ScrollableState scrollable =
       tester.state<ScrollableState>(find.byType(Scrollable));

packages/flutter/test/widgets/scrollable_animations_test.dart

@@ -12,10 +12,15 @@ void main() {
     for (int i = 0; i < 80; i++)
       textWidgets.add(new Text('$i'));
     final ScrollController controller = new ScrollController();
-    await tester.pumpWidget(new ListView(
-      children: textWidgets,
-      controller: controller,
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: textWidgets,
+          controller: controller,
+        ),
+      ),
+    );
 
     expectNoAnimation();
     final double currentPosition = controller.position.pixels;
@@ -30,10 +35,15 @@ void main() {
     for (int i = 0; i < 80; i++)
       textWidgets.add(new Text('$i'));
     final ScrollController controller = new ScrollController();
-    await tester.pumpWidget(new ListView(
-      children: textWidgets,
-      controller: controller,
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: textWidgets,
+          controller: controller,
+        ),
+      ),
+    );
 
     expectNoAnimation();
 
@@ -51,10 +61,15 @@ void main() {
     for (int i = 0; i < 80; i++)
       textWidgets.add(new Text('$i'));
     final ScrollController controller = new ScrollController();
-    await tester.pumpWidget(new ListView(
-      children: textWidgets,
-      controller: controller,
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          children: textWidgets,
+          controller: controller,
+        ),
+      ),
+    );
 
     expectNoAnimation();
 

packages/flutter/test/widgets/scrollable_dispose_test.dart

@@ -12,10 +12,15 @@ void main() {
     final List<Widget> textWidgets = <Widget>[];
     for (int i = 0; i < 250; i++)
       textWidgets.add(new Text('$i'));
-    await tester.pumpWidget(new FlipWidget(
-      left: new ListView(children: textWidgets),
-      right: new Container()
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new FlipWidget(
+          left: new ListView(children: textWidgets),
+          right: new Container()
+        ),
+      ),
+    );
 
     await tester.fling(find.byType(ListView), const Offset(0.0, -200.0), 1000.0);
     await tester.pump();

packages/flutter/test/widgets/scrollable_fling_test.dart

@@ -61,7 +61,12 @@ void main() {
     final List<Widget> textWidgets = <Widget>[];
     for (int i = 0; i < 250; i += 1)
       textWidgets.add(new GestureDetector(onTap: () { log.add('tap $i'); }, child: new Text('$i', style: testFont)));
-    await tester.pumpWidget(new ListView(children: textWidgets));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(children: textWidgets)
+      ),
+    );
 
     expect(log, equals(<String>[]));
     await tester.tap(find.byType(Scrollable));
@@ -84,7 +89,12 @@ void main() {
     final List<Widget> textWidgets = <Widget>[];
     for (int i = 0; i < 250; i += 1)
       textWidgets.add(new GestureDetector(onTap: () { log.add('tap $i'); }, child: new Text('$i', style: testFont)));
-    await tester.pumpWidget(new ListView(children: textWidgets));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(children: textWidgets)
+      ),
+    );
 
     expect(log, equals(<String>[]));
     await tester.tap(find.byType(Scrollable));

packages/flutter/test/widgets/scrollable_grid_test.dart

@@ -8,27 +8,35 @@ import 'package:flutter/rendering.dart';
 
 void main() {
   testWidgets('GridView default control', (WidgetTester tester) async {
-    await tester.pumpWidget(new Center(
-      child: new GridView.count(
-        crossAxisCount: 1,
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Center(
+          child: new GridView.count(
+            crossAxisCount: 1,
+          ),
+        ),
       ),
-    ));
+    );
   });
 
   // Tests https://github.com/flutter/flutter/issues/5522
   testWidgets('GridView displays correct children with nonzero padding', (WidgetTester tester) async {
     final EdgeInsets padding = const EdgeInsets.fromLTRB(0.0, 100.0, 0.0, 0.0);
 
-    final Widget testWidget = new Align(
-      child: new SizedBox(
-        height: 800.0,
-        width: 300.0,  // forces the grid children to be 300..300
-        child: new GridView.count(
-          crossAxisCount: 1,
-          padding: padding,
-          children: new List<Widget>.generate(10, (int index) {
-            return new Text('$index', key: new ValueKey<int>(index));
-          }).toList(),
+    final Widget testWidget = new Directionality(
+      textDirection: TextDirection.ltr,
+      child: new Align(
+        child: new SizedBox(
+          height: 800.0,
+          width: 300.0,  // forces the grid children to be 300..300
+          child: new GridView.count(
+            crossAxisCount: 1,
+            padding: padding,
+            children: new List<Widget>.generate(10, (int index) {
+              return new Text('$index', key: new ValueKey<int>(index));
+            }).toList(),
+          ),
         ),
       ),
     );
@@ -72,14 +80,17 @@ void main() {
   testWidgets('GridView.count() fixed itemExtent, scroll to end, append, scroll', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/9506
     Widget buildFrame(int itemCount) {
-      return new GridView.count(
-        crossAxisCount: itemCount,
-        children: new List<Widget>.generate(itemCount, (int index) {
-          return new SizedBox(
-            height: 200.0,
-            child: new Text('item $index'),
-          );
-        }),
+      return new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new GridView.count(
+          crossAxisCount: itemCount,
+          children: new List<Widget>.generate(itemCount, (int index) {
+            return new SizedBox(
+              height: 200.0,
+              child: new Text('item $index'),
+            );
+          }),
+        ),
       );
     }
 

packages/flutter/test/widgets/scrollable_semantics_test.dart

@@ -15,7 +15,12 @@ void main() {
     final List<Widget> textWidgets = <Widget>[];
     for (int i = 0; i < 80; i++)
       textWidgets.add(new Text('$i'));
-    await tester.pumpWidget(new ListView(children: textWidgets));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(children: textWidgets),
+      ),
+    );
 
     expect(semantics,includesNodeWith(actions: <SemanticsAction>[SemanticsAction.scrollUp]));
 
@@ -48,10 +53,15 @@ void main() {
       initialScrollOffset: kItemHeight / 2,
     );
 
-    await tester.pumpWidget(new ListView(
-      controller: scrollController,
-      children: containers
-    ));
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new ListView(
+          controller: scrollController,
+          children: containers,
+        ),
+      ),
+    );
 
     expect(scrollController.offset, kItemHeight / 2);
 

packages/flutter/test/widgets/single_child_scroll_view_test.dart

@@ -146,16 +146,21 @@ void main() {
   testWidgets('Nested scrollables have a null PrimaryScrollController', (WidgetTester tester) async {
     const Key innerKey = const Key('inner');
     final ScrollController primaryScrollController = new ScrollController();
-    await tester.pumpWidget(new PrimaryScrollController(
-      controller: primaryScrollController,
-      child: new SingleChildScrollView(
-        primary: true,
-        child: new Container(
-          constraints: const BoxConstraints(maxHeight: 200.0),
-          child: new ListView(key: innerKey, primary: true),
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new PrimaryScrollController(
+          controller: primaryScrollController,
+          child: new SingleChildScrollView(
+            primary: true,
+            child: new Container(
+              constraints: const BoxConstraints(maxHeight: 200.0),
+              child: new ListView(key: innerKey, primary: true),
+            ),
+          ),
         ),
       ),
-    ));
+    );
 
     final Scrollable innerScrollable = tester.widget(
       find.descendant(

packages/flutter/test/widgets/sliver_fill_remaining_test.dart

@@ -9,11 +9,14 @@ void main() {
   testWidgets('SliverFillRemaining - no siblings', (WidgetTester tester) async {
     final ScrollController controller = new ScrollController();
     await tester.pumpWidget(
-      new CustomScrollView(
-        controller: controller,
-        slivers: <Widget>[
-          new SliverFillRemaining(child: new Container()),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          controller: controller,
+          slivers: <Widget>[
+            new SliverFillRemaining(child: new Container()),
+          ],
+        ),
       ),
     );
     expect(tester.renderObject<RenderBox>(find.byType(Container)).size.height, equals(600.0));
@@ -34,12 +37,15 @@ void main() {
   testWidgets('SliverFillRemaining - one sibling', (WidgetTester tester) async {
     final ScrollController controller = new ScrollController();
     await tester.pumpWidget(
-      new CustomScrollView(
-        controller: controller,
-        slivers: <Widget>[
-          const SliverToBoxAdapter(child: const SizedBox(height: 100.0)),
-          new SliverFillRemaining(child: new Container()),
-        ],
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new CustomScrollView(
+          controller: controller,
+          slivers: <Widget>[
+            const SliverToBoxAdapter(child: const SizedBox(height: 100.0)),
+            new SliverFillRemaining(child: new Container()),
+          ],
+        ),
       ),
     );
     expect(tester.renderObject<RenderBox>(find.byType(Container)).size.height, equals(500.0));

packages/flutter/test/widgets/state_setting_in_scrollables_test.dart

@@ -79,7 +79,12 @@ class FooScrollBehavior extends ScrollBehavior {
 
 void main() {
   testWidgets('Can animate scroll after setState', (WidgetTester tester) async {
-    await tester.pumpWidget(new Foo());
+    await tester.pumpWidget(
+      new Directionality(
+        textDirection: TextDirection.ltr,
+        child: new Foo(),
+      ),
+    );
     expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 0.0);
     await tester.tap(find.byType(GestureDetector).first);
     await tester.pumpAndSettle();