Merge pull request #1424 from abarth/consolidate_tests

Consolidate widget tests

packages/flutter/lib/animation.dart

@@ -10,7 +10,6 @@ library animation;
 export 'src/animation/animated_simulation.dart';
 export 'src/animation/animated_value.dart';
 export 'src/animation/animation_performance.dart';
-export 'src/animation/clamped_simulation.dart';
 export 'src/animation/curves.dart';
 export 'src/animation/forces.dart';
 export 'src/animation/scheduler.dart';

packages/unit/test/fn3/listener_test.dart

-import 'package:sky/src/fn3.dart';
-import 'package:test/test.dart';
-
-import 'widget_tester.dart';
-
-void main() {
-  test('Events bubble up the tree', () {
-    WidgetTester tester = new WidgetTester();
-
-    List<String> log = new List<String>();
-
-    tester.pumpFrame(
-      new Listener(
-        onPointerDown: (_) {
-          log.add('top');
-        },
-        child: new Listener(
-          onPointerDown: (_) {
-            log.add('middle');
-          },
-          child: new DecoratedBox(
-            decoration: const BoxDecoration(),
-            child: new Listener(
-              onPointerDown: (_) {
-                log.add('bottom');
-              },
-              child: new Text('X')
-            )
-          )
-        )
-      )
-    );
-
-    tester.tap(tester.findText('X'));
-
-    expect(log, equals([
-      'bottom',
-      'middle',
-      'top',
-    ]));
-  });
-}

packages/unit/test/fn3/widget_tester.dart

-import 'dart:sky' as sky;
-
-import 'package:sky/animation.dart';
-import 'package:sky/rendering.dart';
-import 'package:sky/src/fn3.dart';
-
-import '../engine/mock_events.dart';
-
-class RootComponent extends StatefulComponent {
-  RootComponentState createState() => new RootComponentState();
-}
-
-class RootComponentState extends State<RootComponent> {
-  Widget _child = new DecoratedBox(decoration: new BoxDecoration());
-  Widget get child => _child;
-  void set child(Widget value) {
-    if (value != _child) {
-      setState(() {
-        _child = value;
-      });
-    }
-  }
-  Widget build(BuildContext context) => child;
-}
-
-class WidgetTester {
-
-  // See thttps://github.com/flutter/engine/issues/1084 regarding frameTimeMs vs FakeAsync
-
-  void pumpFrame(Widget widget, [ double frameTimeMs = 0.0 ]) {
-    runApp(widget);
-    scheduler.beginFrame(frameTimeMs);
-  }
-
-  void pumpFrameWithoutChange([ double frameTimeMs = 0.0 ]) {
-    scheduler.beginFrame(frameTimeMs);
-  }
-
-  void reset() {
-    runApp(new Container());
-    scheduler.beginFrame(0.0);
-  }
-
-  List<Layer> _layers(Layer layer) {
-    List<Layer> result = [layer];
-    if (layer is ContainerLayer) {
-      ContainerLayer root = layer;
-      Layer child = root.firstChild;
-      while(child != null) {
-        result.addAll(_layers(child));
-        child = child.nextSibling;
-      }
-    }
-    return result;
-  }
-  List<Layer> get layers => _layers(FlutterBinding.instance.renderView.layer);
-
-
-  void walkElements(ElementVisitor visitor) {
-    void walk(Element element) {
-      visitor(element);
-      element.visitChildren(walk);
-    }
-    WidgetFlutterBinding.instance.renderViewElement.visitChildren(walk);
-  }
-
-  Element findElement(bool predicate(Element element)) {
-    try {
-      walkElements((Element element) {
-        if (predicate(element))
-          throw element;
-      });
-    } on Element catch (e) {
-      return e;
-    }
-    return null;
-  }
-
-  Element findElementByKey(Key key) {
-    return findElement((Element element) => element.widget.key == key);
-  }
-
-  Element findText(String text) {
-    return findElement((Element element) {
-      return element.widget is Text && element.widget.data == text;
-    });
-  }
-
-  State findStateOfType(Type type) {
-    StatefulComponentElement element = findElement((Element element) {
-      return element is StatefulComponentElement && element.state.runtimeType == type;
-    });
-    return element?.state;
-  }
-
-  State findStateByConfig(Widget config) {
-    StatefulComponentElement element = findElement((Element element) {
-      return element is StatefulComponentElement && element.state.config == config;
-    });
-    return element?.state;
-  }
-
-  Point getCenter(Element element) {
-    return _getElementPoint(element, (Size size) => size.center(Point.origin));
-  }
-
-  Point getTopLeft(Element element) {
-    return _getElementPoint(element, (_) => Point.origin);
-  }
-
-  Point getTopRight(Element element) {
-    return _getElementPoint(element, (Size size) => size.topRight(Point.origin));
-  }
-
-  Point getBottomLeft(Element element) {
-    return _getElementPoint(element, (Size size) => size.bottomLeft(Point.origin));
-  }
-
-  Point getBottomRight(Element element) {
-    return _getElementPoint(element, (Size size) => size.bottomRight(Point.origin));
-  }
-
-  Point _getElementPoint(Element element, Function sizeToPoint) {
-    assert(element != null);
-    RenderBox box = element.renderObject as RenderBox;
-    assert(box != null);
-    return box.localToGlobal(sizeToPoint(box.size));
-  }
-
-
-  void tap(Element element, { int pointer: 1 }) {
-    tapAt(getCenter(element), pointer: pointer);
-  }
-
-  void tapAt(Point location, { int pointer: 1 }) {
-    HitTestResult result = _hitTest(location);
-    TestPointer p = new TestPointer(pointer);
-    _dispatchEvent(p.down(location), result);
-    _dispatchEvent(p.up(), result);
-  }
-
-  void scroll(Element element, Offset offset, { int pointer: 1 }) {
-    Point startLocation = getCenter(element);
-    Point endLocation = startLocation + offset;
-    TestPointer p = new TestPointer(pointer);
-    // Events for the entire press-drag-release gesture are dispatched
-    // to the widgets "hit" by the pointer down event.
-    HitTestResult result = _hitTest(startLocation);
-    _dispatchEvent(p.down(startLocation), result);
-    _dispatchEvent(p.move(endLocation), result);
-    _dispatchEvent(p.up(), result);
-  }
-
-  void dispatchEvent(sky.Event event, Point location) {
-    _dispatchEvent(event, _hitTest(location));
-  }
-
-  HitTestResult _hitTest(Point location) => WidgetFlutterBinding.instance.hitTest(location);
-
-  void _dispatchEvent(sky.Event event, HitTestResult result) {
-    WidgetFlutterBinding.instance.dispatchEvent(event, result);
-  }
-
-}

packages/unit/test/widget/align_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Align smoke test', () {

packages/unit/test/widget/block_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
 import '../engine/mock_events.dart';
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 final Key blockKey = new Key('test');
 

packages/unit/test/widget/box_decoration_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/material.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Circles can have uniform borders', () {

packages/unit/test/widget/build_scope_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
-import '../fn3/test_widgets.dart';
+import 'widget_tester.dart';
+import 'test_widgets.dart';
 
 class ProbeWidget extends StatefulComponent {
   ProbeWidgetState createState() => new ProbeWidgetState();

packages/unit/test/widget/center_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Can be placed in an infinte box', () {

packages/unit/test/widget/date_picker_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Can select a day', () {

packages/unit/test/widget/dismissable_test.dart

@@ -3,7 +3,7 @@ import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
 import '../engine/mock_events.dart';
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const double itemExtent = 100.0;
 ScrollDirection scrollDirection = ScrollDirection.vertical;

packages/unit/test/widget/draggable_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
 import '../engine/mock_events.dart';
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Drag and drop - control test', () {

packages/unit/test/widget/duplicate_key_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 class Item {
   GlobalKey key1 = new GlobalKey();

packages/unit/test/widget/flex_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Can hit test flex children of stacks', () {

packages/unit/test/widget/gesture_detector_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
 import '../engine/mock_events.dart';
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Uncontested scrolls start immediately', () {

packages/unit/test/widget/input_test.dart

@@ -5,7 +5,7 @@ import 'package:sky/services.dart';
 import 'package:sky/widgets_next.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 import '../services/mock_services.dart';
 
 class MockKeyboard implements KeyboardService {

packages/unit/test/widget/listener_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Events bubble up the tree', () {

packages/unit/test/widget/navigator_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/animation.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 class FirstComponent extends StatelessComponent {
   FirstComponent(this.navigator);

packages/unit/test/widget/pageable_list_test.dart

@@ -2,7 +2,7 @@ import 'package:quiver/testing/async.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const Size pageSize = const Size(800.0, 600.0);
 const List<int> pages = const <int>[0, 1, 2, 3, 4, 5];

packages/unit/test/widget/progress_indicator_test.dart

@@ -3,7 +3,7 @@ import 'package:sky/rendering.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('LinearProgressIndicator changes when its value changes', () {

packages/unit/test/widget/scrollable_list_hit_testing_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/rendering.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 List<int> tapped = <int>[];

packages/unit/test/widget/scrollable_list_horizontal_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/rendering.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 

packages/unit/test/widget/scrollable_list_vertical_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 

packages/unit/test/widget/set_state_3_test.dart

@@ -5,7 +5,7 @@
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 ChangerState changer;
 

packages/unit/test/widget/set_state_test.dart

@@ -2,7 +2,7 @@ import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
 import '../engine/mock_events.dart';
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 class Inside extends StatefulComponent {
   InsideState createState() => new InsideState();

packages/unit/test/widget/snap_scrolling_test.dart

@@ -8,7 +8,7 @@ import 'package:quiver/testing/async.dart';
 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 const double itemExtent = 200.0;
 ScrollDirection scrollDirection = ScrollDirection.vertical;

packages/unit/test/widget/stack_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Can change position data', () {

packages/unit/test/widget/stateful_components_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 class InnerComponent extends StatefulComponent {
   InnerComponent({ Key key }) : super(key: key);

packages/unit/test/widget/syncing_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 class TestWidget extends StatefulComponent {
   TestWidget({ this.child, this.persistentState, this.syncedState });

packages/unit/test/widget/transform_test.dart

 import 'package:sky/src/fn3.dart';
 import 'package:test/test.dart';
 
-import '../fn3/widget_tester.dart';
+import 'widget_tester.dart';
 
 void main() {
   test('Transform origin', () {

packages/unit/test/widget/widget_tester.dart

@@ -2,36 +2,44 @@ import 'dart:sky' as sky;
 
 import 'package:sky/animation.dart';
 import 'package:sky/rendering.dart';
-import 'package:sky/widgets.dart';
+import 'package:sky/src/fn3.dart';
 
 import '../engine/mock_events.dart';
 
-typedef Widget WidgetBuilder();
-
-class TestApp extends App {
-
-  WidgetBuilder _builder;
-  void set builder (WidgetBuilder value) {
-    setState(() {
-      _builder = value;
-    });
-  }
+class RootComponent extends StatefulComponent {
+  RootComponentState createState() => new RootComponentState();
+}
 
-  Widget build() {
-    if (_builder != null)
-      return _builder();
-    return new Container();
+class RootComponentState extends State<RootComponent> {
+  Widget _child = new DecoratedBox(decoration: new BoxDecoration());
+  Widget get child => _child;
+  void set child(Widget value) {
+    if (value != _child) {
+      setState(() {
+        _child = value;
+      });
+    }
   }
+  Widget build(BuildContext context) => child;
 }
 
 class WidgetTester {
-  WidgetTester() {
-    _app = new TestApp();
-    runApp(_app);
-    scheduler.beginFrame(0.0); // to initialise the app
+
+  // See thttps://github.com/flutter/engine/issues/1084 regarding frameTimeMs vs FakeAsync
+
+  void pumpFrame(Widget widget, [ double frameTimeMs = 0.0 ]) {
+    runApp(widget);
+    scheduler.beginFrame(frameTimeMs);
+  }
+
+  void pumpFrameWithoutChange([ double frameTimeMs = 0.0 ]) {
+    scheduler.beginFrame(frameTimeMs);
   }
 
-  TestApp _app;
+  void reset() {
+    runApp(new Container());
+    scheduler.beginFrame(0.0);
+  }
 
   List<Layer> _layers(Layer layer) {
     List<Layer> result = [layer];
@@ -47,70 +55,81 @@ class WidgetTester {
   }
   List<Layer> get layers => _layers(FlutterBinding.instance.renderView.layer);
 
-  void walkWidgets(WidgetTreeWalker walker) {
-    void walk(Widget widget) {
-      walker(widget);
-      widget.walkChildren(walk);
-    }
 
-    _app.walkChildren(walk);
+  void walkElements(ElementVisitor visitor) {
+    void walk(Element element) {
+      visitor(element);
+      element.visitChildren(walk);
+    }
+    WidgetFlutterBinding.instance.renderViewElement.visitChildren(walk);
   }
 
-  Widget findWidget(bool predicate(Widget widget)) {
+  Element findElement(bool predicate(Element element)) {
     try {
-      walkWidgets((Widget widget) {
-        if (predicate(widget))
-          throw widget;
+      walkElements((Element element) {
+        if (predicate(element))
+          throw element;
       });
-    } catch (e) {
-      if (e is Widget)
-        return e;
-      rethrow;
+    } on Element catch (e) {
+      return e;
     }
     return null;
   }
 
-  Text findText(String text) {
-    return findWidget((Widget widget) {
-      return widget is Text && widget.data == text;
+  Element findElementByKey(Key key) {
+    return findElement((Element element) => element.widget.key == key);
+  }
+
+  Element findText(String text) {
+    return findElement((Element element) {
+      return element.widget is Text && element.widget.data == text;
     });
   }
 
-  Point _getWidgetPoint(Widget widget, Function sizeToPoint) {
-    assert(widget != null);
-    RenderBox box = widget.renderObject as RenderBox;
-    assert(box != null);
-    return box.localToGlobal(sizeToPoint(box.size));
+  State findStateOfType(Type type) {
+    StatefulComponentElement element = findElement((Element element) {
+      return element is StatefulComponentElement && element.state.runtimeType == type;
+    });
+    return element?.state;
   }
 
-  Point getCenter(Widget widget) {
-    return _getWidgetPoint(widget, (Size size) => size.center(Point.origin));
+  State findStateByConfig(Widget config) {
+    StatefulComponentElement element = findElement((Element element) {
+      return element is StatefulComponentElement && element.state.config == config;
+    });
+    return element?.state;
   }
 
-  Point getTopLeft(Widget widget) {
-    return _getWidgetPoint(widget, (_) => Point.origin);
+  Point getCenter(Element element) {
+    return _getElementPoint(element, (Size size) => size.center(Point.origin));
   }
 
-  Point getTopRight(Widget widget) {
-    return _getWidgetPoint(widget, (Size size) => size.topRight(Point.origin));
+  Point getTopLeft(Element element) {
+    return _getElementPoint(element, (_) => Point.origin);
   }
 
-  Point getBottomLeft(Widget widget) {
-    return _getWidgetPoint(widget, (Size size) => size.bottomLeft(Point.origin));
+  Point getTopRight(Element element) {
+    return _getElementPoint(element, (Size size) => size.topRight(Point.origin));
   }
 
-  Point getBottomRight(Widget widget) {
-    return _getWidgetPoint(widget, (Size size) => size.bottomRight(Point.origin));
+  Point getBottomLeft(Element element) {
+    return _getElementPoint(element, (Size size) => size.bottomLeft(Point.origin));
   }
 
-  HitTestResult _hitTest(Point location) => FlutterBinding.instance.hitTest(location);
+  Point getBottomRight(Element element) {
+    return _getElementPoint(element, (Size size) => size.bottomRight(Point.origin));
+  }
 
-  void _dispatchEvent(sky.Event event, HitTestResult result) {
-    FlutterBinding.instance.dispatchEvent(event, result);
+  Point _getElementPoint(Element element, Function sizeToPoint) {
+    assert(element != null);
+    RenderBox box = element.renderObject as RenderBox;
+    assert(box != null);
+    return box.localToGlobal(sizeToPoint(box.size));
   }
 
-  void tap(Widget widget, { int pointer: 1 }) {
-    tapAt(getCenter(widget), pointer: pointer);
+
+  void tap(Element element, { int pointer: 1 }) {
+    tapAt(getCenter(element), pointer: pointer);
   }
 
   void tapAt(Point location, { int pointer: 1 }) {
@@ -120,8 +139,8 @@ class WidgetTester {
     _dispatchEvent(p.up(), result);
   }
 
-  void scroll(Widget widget, Offset offset, { int pointer: 1 }) {
-    Point startLocation = getCenter(widget);
+  void scroll(Element element, Offset offset, { int pointer: 1 }) {
+    Point startLocation = getCenter(element);
     Point endLocation = startLocation + offset;
     TestPointer p = new TestPointer(pointer);
     // Events for the entire press-drag-release gesture are dispatched
@@ -136,13 +155,10 @@ class WidgetTester {
     _dispatchEvent(event, _hitTest(location));
   }
 
-  void pumpFrame(WidgetBuilder builder, [double frameTimeMs = 0.0]) {
-    _app.builder = builder;
-    scheduler.beginFrame(frameTimeMs);
-  }
+  HitTestResult _hitTest(Point location) => WidgetFlutterBinding.instance.hitTest(location);
 
-  void pumpFrameWithoutChange([double frameTimeMs = 0.0]) {
-    scheduler.beginFrame(frameTimeMs);
+  void _dispatchEvent(sky.Event event, HitTestResult result) {
+    WidgetFlutterBinding.instance.dispatchEvent(event, result);
   }
 
 }