// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'rendering_tester.dart';
class MissingPerformLayoutRenderBox extends RenderBox {
void triggerExceptionSettingSizeOutsideOfLayout() {
size = const Size(200, 200);
}
// performLayout is left unimplemented to test the error reported if it is
// missing.
}
class FakeMissingSizeRenderBox extends RenderBox {
@override
void performLayout() {
size = constraints.biggest;
}
@override
bool get hasSize => !fakeMissingSize && super.hasSize;
bool fakeMissingSize = false;
}
void main() {
test('should size to render view', () {
final RenderBox root = RenderDecoratedBox(
decoration: BoxDecoration(
color: const Color(0xFF00FF00),
gradient: RadialGradient(
center: Alignment.topLeft,
radius: 1.8,
colors: <Color>[Colors.yellow[500], Colors.blue[500]],
),
boxShadow: kElevationToShadow[3],
),
);
layout(root);
expect(root.size.width, equals(800.0));
expect(root.size.height, equals(600.0));
});
test('performLayout error message', () {
FlutterError result;
try {
MissingPerformLayoutRenderBox().performLayout();
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' MissingPerformLayoutRenderBox did not implement performLayout().\n'
' RenderBox subclasses need to either override performLayout() to\n'
' set a size and lay out any children, or, set sizedByParent to\n'
' true so that performResize() sizes the render object.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'RenderBox subclasses need to either override performLayout() to set a '
'size and lay out any children, or, set sizedByParent to true so that '
'performResize() sizes the render object.',
);
});
test('applyPaintTransform error message', () {
final RenderBox paddingBox = RenderPadding(
padding: const EdgeInsets.all(10.0),
);
final RenderBox root = RenderPadding(
padding: const EdgeInsets.all(10.0),
child: paddingBox,
);
layout(root);
// Trigger the error by overriding the parentData with data that isn't a
// BoxParentData.
paddingBox.parentData = ParentData();
FlutterError result;
try {
root.applyPaintTransform(paddingBox, Matrix4.identity());
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' RenderPadding does not implement applyPaintTransform.\n'
' The following RenderPadding object: RenderPadding#00000 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE:\n'
' parentData: <none>\n'
' constraints: BoxConstraints(w=800.0, h=600.0)\n'
' size: Size(800.0, 600.0)\n'
' padding: EdgeInsets.all(10.0)\n'
' ...did not use a BoxParentData class for the parentData field of the following child:\n'
' RenderPadding#00000 NEEDS-PAINT:\n'
' parentData: <none> (can use size)\n'
' constraints: BoxConstraints(w=780.0, h=580.0)\n'
' size: Size(780.0, 580.0)\n'
' padding: EdgeInsets.all(10.0)\n'
' The RenderPadding class inherits from RenderBox.\n'
' The default applyPaintTransform implementation provided by\n'
' RenderBox assumes that the children all use BoxParentData objects\n'
' for their parentData field. Since RenderPadding does not in fact\n'
' use that ParentData class for its children, it must provide an\n'
' implementation of applyPaintTransform that supports the specific\n'
' ParentData subclass used by its children (which apparently is\n'
' ParentData).\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'The default applyPaintTransform implementation provided by RenderBox '
'assumes that the children all use BoxParentData objects for their '
'parentData field. Since RenderPadding does not in fact use that '
'ParentData class for its children, it must provide an implementation '
'of applyPaintTransform that supports the specific ParentData subclass '
'used by its children (which apparently is ParentData).',
);
});
test('Set size error messages', () {
final RenderBox root = RenderDecoratedBox(
decoration: const BoxDecoration(
color: Color(0xFF00FF00),
),
);
layout(root);
final MissingPerformLayoutRenderBox testBox = MissingPerformLayoutRenderBox();
{
FlutterError result;
try {
testBox.triggerExceptionSettingSizeOutsideOfLayout();
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' RenderBox size setter called incorrectly.\n'
' The size setter was called from outside layout (neither\n'
' performResize() nor performLayout() were being run for this\n'
' object).\n'
' Because this RenderBox has sizedByParent set to false, it must\n'
' set its size in performLayout().\n'
),
);
expect(result.diagnostics.where((DiagnosticsNode node) => node.level == DiagnosticLevel.hint), isEmpty);
}
{
FlutterError result;
try {
testBox.debugAdoptSize(root.size);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The size property was assigned a size inappropriately.\n'
' The following render object: MissingPerformLayoutRenderBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED:\n'
' parentData: MISSING\n'
' constraints: MISSING\n'
' size: MISSING\n'
' ...was assigned a size obtained from: RenderDecoratedBox#00000 NEEDS-PAINT:\n'
' parentData: <none>\n'
' constraints: BoxConstraints(w=800.0, h=600.0)\n'
' size: Size(800.0, 600.0)\n'
' decoration: BoxDecoration:\n'
' color: Color(0xff00ff00)\n'
' configuration: ImageConfiguration()\n'
' However, this second render object is not, or is no longer, a\n'
' child of the first, and it is therefore a violation of the\n'
' RenderBox layout protocol to use that size in the layout of the\n'
' first render object.\n'
' If the size was obtained at a time where it was valid to read the\n'
' size (because the second render object above was a child of the\n'
' first at the time), then it should be adopted using\n'
' debugAdoptSize at that time.\n'
' If the size comes from a grandchild or a render object from an\n'
' entirely different part of the render tree, then there is no way\n'
' to be notified when the size changes and therefore attempts to\n'
' read that size are almost certainly a source of bugs. A different\n'
' approach should be used.\n'
),
);
expect(result.diagnostics.where((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).length, 2);
}
});
test('Flex and padding', () {
final RenderBox size = RenderConstrainedBox(
additionalConstraints: const BoxConstraints().tighten(height: 100.0),
);
final RenderBox inner = RenderDecoratedBox(
decoration: const BoxDecoration(
color: Color(0xFF00FF00),
),
child: size,
);
final RenderBox padding = RenderPadding(
padding: const EdgeInsets.all(50.0),
child: inner,
);
final RenderBox flex = RenderFlex(
children: <RenderBox>[padding],
direction: Axis.vertical,
crossAxisAlignment: CrossAxisAlignment.stretch,
);
final RenderBox outer = RenderDecoratedBox(
decoration: const BoxDecoration(
color: Color(0xFF0000FF),
),
child: flex,
);
layout(outer);
expect(size.size.width, equals(700.0));
expect(size.size.height, equals(100.0));
expect(inner.size.width, equals(700.0));
expect(inner.size.height, equals(100.0));
expect(padding.size.width, equals(800.0));
expect(padding.size.height, equals(200.0));
expect(flex.size.width, equals(800.0));
expect(flex.size.height, equals(600.0));
expect(outer.size.width, equals(800.0));
expect(outer.size.height, equals(600.0));
});
test('should not have a 0 sized colored Box', () {
final RenderBox coloredBox = RenderDecoratedBox(
decoration: const BoxDecoration(),
);
expect(coloredBox, hasAGoodToStringDeep);
expect(
coloredBox.toStringDeep(minLevel: DiagnosticLevel.info),
equalsIgnoringHashCodes(
'RenderDecoratedBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n'
' parentData: MISSING\n'
' constraints: MISSING\n'
' size: MISSING\n'
' decoration: BoxDecoration:\n'
' <no decorations specified>\n'
' configuration: ImageConfiguration()\n'),
);
final RenderBox paddingBox = RenderPadding(
padding: const EdgeInsets.all(10.0),
child: coloredBox,
);
final RenderBox root = RenderDecoratedBox(
decoration: const BoxDecoration(),
child: paddingBox,
);
layout(root);
expect(coloredBox.size.width, equals(780.0));
expect(coloredBox.size.height, equals(580.0));
expect(coloredBox, hasAGoodToStringDeep);
expect(
coloredBox.toStringDeep(minLevel: DiagnosticLevel.info),
equalsIgnoringHashCodes(
'RenderDecoratedBox#00000 NEEDS-PAINT\n'
' parentData: offset=Offset(10.0, 10.0) (can use size)\n'
' constraints: BoxConstraints(w=780.0, h=580.0)\n'
' size: Size(780.0, 580.0)\n'
' decoration: BoxDecoration:\n'
' <no decorations specified>\n'
' configuration: ImageConfiguration()\n',
),
);
});
test('reparenting should clear position', () {
final RenderDecoratedBox coloredBox = RenderDecoratedBox(
decoration: const BoxDecoration(),
);
final RenderPadding paddedBox = RenderPadding(
child: coloredBox,
padding: const EdgeInsets.all(10.0),
);
layout(paddedBox);
final BoxParentData parentData = coloredBox.parentData as BoxParentData;
expect(parentData.offset.dx, isNot(equals(0.0)));
paddedBox.child = null;
final RenderConstrainedBox constraintedBox = RenderConstrainedBox(
child: coloredBox,
additionalConstraints: const BoxConstraints(),
);
layout(constraintedBox);
expect(coloredBox.parentData?.runtimeType, ParentData);
});
test('UnconstrainedBox expands to fit children', () {
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
constrainedAxis: Axis.horizontal, // This is reset to null below.
textDirection: TextDirection.ltr,
child: RenderConstrainedBox(
additionalConstraints: const BoxConstraints.tightFor(width: 200.0, height: 200.0),
),
alignment: Alignment.center,
);
layout(
unconstrained,
constraints: const BoxConstraints(
minWidth: 200.0,
maxWidth: 200.0,
minHeight: 200.0,
maxHeight: 200.0,
),
);
// Check that we can update the constrained axis to null.
unconstrained.constrainedAxis = null;
renderer.reassembleApplication();
expect(unconstrained.size.width, equals(200.0), reason: 'unconstrained width');
expect(unconstrained.size.height, equals(200.0), reason: 'unconstrained height');
});
test('UnconstrainedBox handles vertical overflow', () {
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
textDirection: TextDirection.ltr,
child: RenderConstrainedBox(
additionalConstraints: const BoxConstraints.tightFor(height: 200.0),
),
alignment: Alignment.center,
);
const BoxConstraints viewport = BoxConstraints(maxHeight: 100.0, maxWidth: 100.0);
layout(unconstrained, constraints: viewport);
expect(unconstrained.getMinIntrinsicHeight(100.0), equals(200.0));
expect(unconstrained.getMaxIntrinsicHeight(100.0), equals(200.0));
expect(unconstrained.getMinIntrinsicWidth(100.0), equals(0.0));
expect(unconstrained.getMaxIntrinsicWidth(100.0), equals(0.0));
});
test('UnconstrainedBox handles horizontal overflow', () {
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
textDirection: TextDirection.ltr,
child: RenderConstrainedBox(
additionalConstraints: const BoxConstraints.tightFor(width: 200.0),
),
alignment: Alignment.center,
);
const BoxConstraints viewport = BoxConstraints(maxHeight: 100.0, maxWidth: 100.0);
layout(unconstrained, constraints: viewport);
expect(unconstrained.getMinIntrinsicHeight(100.0), equals(0.0));
expect(unconstrained.getMaxIntrinsicHeight(100.0), equals(0.0));
expect(unconstrained.getMinIntrinsicWidth(100.0), equals(200.0));
expect(unconstrained.getMaxIntrinsicWidth(100.0), equals(200.0));
});
test ('getMinInstrinsicWidth error handling', () {
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
textDirection: TextDirection.ltr,
child: RenderConstrainedBox(
additionalConstraints: const BoxConstraints.tightFor(width: 200.0),
),
alignment: Alignment.center,
);
const BoxConstraints viewport = BoxConstraints(maxHeight: 100.0, maxWidth: 100.0);
layout(unconstrained, constraints: viewport);
{
FlutterError result;
try {
unconstrained.getMinIntrinsicWidth(null);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The height argument to getMinIntrinsicWidth was null.\n'
' The argument to getMinIntrinsicWidth must not be negative or\n'
' null.\n'
' If you do not have a specific height in mind, then pass\n'
' double.infinity instead.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you do not have a specific height in mind, then pass double.infinity instead.',
);
}
{
FlutterError result;
try {
unconstrained.getMinIntrinsicWidth(-1);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The height argument to getMinIntrinsicWidth was negative.\n'
' The argument to getMinIntrinsicWidth must not be negative or\n'
' null.\n'
' If you perform computations on another height before passing it\n'
' to getMinIntrinsicWidth, consider using math.max() or\n'
' double.clamp() to force the value into the valid range.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you perform computations on another height before passing it to '
'getMinIntrinsicWidth, consider using math.max() or double.clamp() '
'to force the value into the valid range.',
);
}
{
FlutterError result;
try {
unconstrained.getMinIntrinsicHeight(null);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The width argument to getMinIntrinsicHeight was null.\n'
' The argument to getMinIntrinsicHeight must not be negative or\n'
' null.\n'
' If you do not have a specific width in mind, then pass\n'
' double.infinity instead.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you do not have a specific width in mind, then pass double.infinity instead.',
);
}
{
FlutterError result;
try {
unconstrained.getMinIntrinsicHeight(-1);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The width argument to getMinIntrinsicHeight was negative.\n'
' The argument to getMinIntrinsicHeight must not be negative or\n'
' null.\n'
' If you perform computations on another width before passing it to\n'
' getMinIntrinsicHeight, consider using math.max() or\n'
' double.clamp() to force the value into the valid range.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you perform computations on another width before passing it to '
'getMinIntrinsicHeight, consider using math.max() or double.clamp() '
'to force the value into the valid range.',
);
}
{
FlutterError result;
try {
unconstrained.getMaxIntrinsicWidth(null);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The height argument to getMaxIntrinsicWidth was null.\n'
' The argument to getMaxIntrinsicWidth must not be negative or\n'
' null.\n'
' If you do not have a specific height in mind, then pass\n'
' double.infinity instead.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you do not have a specific height in mind, then pass double.infinity instead.',
);
}
{
FlutterError result;
try {
unconstrained.getMaxIntrinsicWidth(-1);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The height argument to getMaxIntrinsicWidth was negative.\n'
' The argument to getMaxIntrinsicWidth must not be negative or\n'
' null.\n'
' If you perform computations on another height before passing it\n'
' to getMaxIntrinsicWidth, consider using math.max() or\n'
' double.clamp() to force the value into the valid range.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you perform computations on another height before passing it to '
'getMaxIntrinsicWidth, consider using math.max() or double.clamp() '
'to force the value into the valid range.',
);
}
{
FlutterError result;
try {
unconstrained.getMaxIntrinsicHeight(null);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The width argument to getMaxIntrinsicHeight was null.\n'
' The argument to getMaxIntrinsicHeight must not be negative or\n'
' null.\n'
' If you do not have a specific width in mind, then pass\n'
' double.infinity instead.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you do not have a specific width in mind, then pass double.infinity instead.',
);
}
{
FlutterError result;
try {
unconstrained.getMaxIntrinsicHeight(-1);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' The width argument to getMaxIntrinsicHeight was negative.\n'
' The argument to getMaxIntrinsicHeight must not be negative or\n'
' null.\n'
' If you perform computations on another width before passing it to\n'
' getMaxIntrinsicHeight, consider using math.max() or\n'
' double.clamp() to force the value into the valid range.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you perform computations on another width before passing it to '
'getMaxIntrinsicHeight, consider using math.max() or double.clamp() '
'to force the value into the valid range.',
);
}
});
test('UnconstrainedBox.toStringDeep returns useful information', () {
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
textDirection: TextDirection.ltr,
alignment: Alignment.center,
);
expect(unconstrained.alignment, Alignment.center);
expect(unconstrained.textDirection, TextDirection.ltr);
expect(unconstrained, hasAGoodToStringDeep);
expect(
unconstrained.toStringDeep(minLevel: DiagnosticLevel.info),
equalsIgnoringHashCodes(
'RenderUnconstrainedBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED\n'
' parentData: MISSING\n'
' constraints: MISSING\n'
' size: MISSING\n'
' alignment: center\n'
' textDirection: ltr\n'),
);
});
test('UnconstrainedBox honors constrainedAxis=Axis.horizontal', () {
final RenderConstrainedBox flexible =
RenderConstrainedBox(additionalConstraints: const BoxConstraints.expand(height: 200.0));
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
constrainedAxis: Axis.horizontal,
textDirection: TextDirection.ltr,
child: RenderFlex(
direction: Axis.horizontal,
textDirection: TextDirection.ltr,
children: <RenderBox>[flexible],
),
alignment: Alignment.center,
);
final FlexParentData flexParentData = flexible.parentData as FlexParentData;
flexParentData.flex = 1;
flexParentData.fit = FlexFit.tight;
const BoxConstraints viewport = BoxConstraints(maxWidth: 100.0);
layout(unconstrained, constraints: viewport);
expect(unconstrained.size.width, equals(100.0), reason: 'constrained width');
expect(unconstrained.size.height, equals(200.0), reason: 'unconstrained height');
});
test('UnconstrainedBox honors constrainedAxis=Axis.vertical', () {
final RenderConstrainedBox flexible =
RenderConstrainedBox(additionalConstraints: const BoxConstraints.expand(width: 200.0));
final RenderUnconstrainedBox unconstrained = RenderUnconstrainedBox(
constrainedAxis: Axis.vertical,
textDirection: TextDirection.ltr,
child: RenderFlex(
direction: Axis.vertical,
textDirection: TextDirection.ltr,
children: <RenderBox>[flexible],
),
alignment: Alignment.center,
);
final FlexParentData flexParentData = flexible.parentData as FlexParentData;
flexParentData.flex = 1;
flexParentData.fit = FlexFit.tight;
const BoxConstraints viewport = BoxConstraints(maxHeight: 100.0);
layout(unconstrained, constraints: viewport);
expect(unconstrained.size.width, equals(200.0), reason: 'unconstrained width');
expect(unconstrained.size.height, equals(100.0), reason: 'constrained height');
});
group('hit testing', () {
test('BoxHitTestResult wrapping HitTestResult', () {
final HitTestEntry entry1 = HitTestEntry(_DummyHitTestTarget());
final HitTestEntry entry2 = HitTestEntry(_DummyHitTestTarget());
final HitTestEntry entry3 = HitTestEntry(_DummyHitTestTarget());
final Matrix4 transform = Matrix4.translationValues(40.0, 150.0, 0.0);
final HitTestResult wrapped = MyHitTestResult()
..publicPushTransform(transform);
wrapped.add(entry1);
expect(wrapped.path, equals(<HitTestEntry>[entry1]));
expect(entry1.transform, transform);
final BoxHitTestResult wrapping = BoxHitTestResult.wrap(wrapped);
expect(wrapping.path, equals(<HitTestEntry>[entry1]));
expect(wrapping.path, same(wrapped.path));
wrapping.add(entry2);
expect(wrapping.path, equals(<HitTestEntry>[entry1, entry2]));
expect(wrapped.path, equals(<HitTestEntry>[entry1, entry2]));
expect(entry2.transform, transform);
wrapped.add(entry3);
expect(wrapping.path, equals(<HitTestEntry>[entry1, entry2, entry3]));
expect(wrapped.path, equals(<HitTestEntry>[entry1, entry2, entry3]));
expect(entry3.transform, transform);
});
test('addWithPaintTransform', () {
final BoxHitTestResult result = BoxHitTestResult();
final List<Offset> positions = <Offset>[];
bool isHit = result.addWithPaintTransform(
transform: null,
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
isHit = result.addWithPaintTransform(
transform: Matrix4.translationValues(20, 30, 0),
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
const Offset position = Offset(3, 4);
isHit = result.addWithPaintTransform(
transform: null,
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return false;
},
);
expect(isHit, isFalse);
expect(positions.single, position);
positions.clear();
isHit = result.addWithPaintTransform(
transform: Matrix4.identity(),
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position);
positions.clear();
isHit = result.addWithPaintTransform(
transform: Matrix4.translationValues(20, 30, 0),
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position - const Offset(20, 30));
positions.clear();
isHit = result.addWithPaintTransform(
transform: MatrixUtils.forceToPoint(position), // cannot be inverted
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isFalse);
expect(positions, isEmpty);
positions.clear();
});
test('addWithPaintOffset', () {
final BoxHitTestResult result = BoxHitTestResult();
final List<Offset> positions = <Offset>[];
bool isHit = result.addWithPaintOffset(
offset: null,
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
isHit = result.addWithPaintOffset(
offset: const Offset(55, 32),
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
const Offset position = Offset(3, 4);
isHit = result.addWithPaintOffset(
offset: null,
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return false;
},
);
expect(isHit, isFalse);
expect(positions.single, position);
positions.clear();
isHit = result.addWithPaintOffset(
offset: Offset.zero,
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position);
positions.clear();
isHit = result.addWithPaintOffset(
offset: const Offset(20, 30),
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position - const Offset(20, 30));
positions.clear();
});
test('addWithRawTransform', () {
final BoxHitTestResult result = BoxHitTestResult();
final List<Offset> positions = <Offset>[];
bool isHit = result.addWithRawTransform(
transform: null,
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
isHit = result.addWithRawTransform(
transform: Matrix4.translationValues(20, 30, 0),
position: null,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, isNull);
positions.clear();
const Offset position = Offset(3, 4);
isHit = result.addWithRawTransform(
transform: null,
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return false;
},
);
expect(isHit, isFalse);
expect(positions.single, position);
positions.clear();
isHit = result.addWithRawTransform(
transform: Matrix4.identity(),
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position);
positions.clear();
isHit = result.addWithRawTransform(
transform: Matrix4.translationValues(20, 30, 0),
position: position,
hitTest: (BoxHitTestResult result, Offset position) {
expect(result, isNotNull);
positions.add(position);
return true;
},
);
expect(isHit, isTrue);
expect(positions.single, position + const Offset(20, 30));
positions.clear();
});
test('error message', () {
{
final RenderBox renderObject = RenderConstrainedBox(
additionalConstraints: const BoxConstraints().tighten(height: 100.0),
);
FlutterError result;
try {
final BoxHitTestResult result = BoxHitTestResult();
renderObject.hitTest(result, position: Offset.zero);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' Cannot hit test a render box that has never been laid out.\n'
' The hitTest() method was called on this RenderBox: RenderConstrainedBox#00000 NEEDS-LAYOUT NEEDS-PAINT DETACHED:\n'
' parentData: MISSING\n'
' constraints: MISSING\n'
' size: MISSING\n'
' additionalConstraints: BoxConstraints(0.0<=w<=Infinity, h=100.0)\n'
" Unfortunately, this object's geometry is not known at this time,\n"
' probably because it has never been laid out. This means it cannot\n'
' be accurately hit-tested.\n'
' If you are trying to perform a hit test during the layout phase\n'
' itself, make sure you only hit test nodes that have completed\n'
" layout (e.g. the node's children, after their layout() method has\n"
' been called).\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'If you are trying to perform a hit test during the layout phase '
'itself, make sure you only hit test nodes that have completed '
"layout (e.g. the node's children, after their layout() method has "
'been called).',
);
}
{
FlutterError result;
final FakeMissingSizeRenderBox renderObject = FakeMissingSizeRenderBox();
layout(renderObject);
renderObject.fakeMissingSize = true;
try {
final BoxHitTestResult result = BoxHitTestResult();
renderObject.hitTest(result, position: Offset.zero);
} on FlutterError catch (e) {
result = e;
}
expect(result, isNotNull);
expect(
result.toStringDeep(),
equalsIgnoringHashCodes(
'FlutterError\n'
' Cannot hit test a render box with no size.\n'
' The hitTest() method was called on this RenderBox: FakeMissingSizeRenderBox#00000 NEEDS-PAINT:\n'
' parentData: <none>\n'
' constraints: BoxConstraints(w=800.0, h=600.0)\n'
' size: Size(800.0, 600.0)\n'
' Although this node is not marked as needing layout, its size is\n'
' not set.\n'
' A RenderBox object must have an explicit size before it can be\n'
' hit-tested. Make sure that the RenderBox in question sets its\n'
' size during layout.\n'
),
);
expect(
result.diagnostics.singleWhere((DiagnosticsNode node) => node.level == DiagnosticLevel.hint).toString(),
'A RenderBox object must have an explicit size before it can be '
'hit-tested. Make sure that the RenderBox in question sets its '
'size during layout.',
);
}
});
test('localToGlobal with ancestor', () {
final RenderConstrainedBox innerConstrained = RenderConstrainedBox(additionalConstraints: const BoxConstraints.tightFor(width: 50, height: 50));
final RenderPositionedBox innerCenter = RenderPositionedBox(alignment: Alignment.center, child: innerConstrained);
final RenderConstrainedBox outerConstrained = RenderConstrainedBox(additionalConstraints: const BoxConstraints.tightFor(width: 100, height: 100), child: innerCenter);
final RenderPositionedBox outerCentered = RenderPositionedBox(alignment: Alignment.center, child: outerConstrained);
layout(outerCentered);
expect(innerConstrained.localToGlobal(Offset.zero, ancestor: outerConstrained).dy, 25.0);
});
});
test('BoxConstraints parameters should be non-null', () {
expect(() => BoxConstraints(minWidth: null), throwsAssertionError);
expect(() => BoxConstraints(maxWidth: null), throwsAssertionError);
expect(() => BoxConstraints(minHeight: null), throwsAssertionError);
expect(() => BoxConstraints(maxHeight: null), throwsAssertionError);
});
}
class _DummyHitTestTarget implements HitTestTarget {
@override
void handleEvent(PointerEvent event, HitTestEntry entry) {
// Nothing to do.
}
}
class MyHitTestResult extends HitTestResult {
void publicPushTransform(Matrix4 transform) => pushTransform(transform);
}