| // Copyright 2015 The Chromium 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/rendering.dart'; |
| import 'package:test/test.dart'; |
| |
| import 'rendering_tester.dart'; |
| |
| void main() { |
| test('Stack can layout with top, right, bottom, left 0.0', () { |
| final RenderBox size = new RenderConstrainedBox( |
| additionalConstraints: new BoxConstraints.tight(const Size(100.0, 100.0)) |
| ); |
| |
| final RenderBox red = new RenderDecoratedBox( |
| decoration: const BoxDecoration( |
| color: const Color(0xFFFF0000), |
| ), |
| child: size |
| ); |
| |
| final RenderBox green = new RenderDecoratedBox( |
| decoration: const BoxDecoration( |
| color: const Color(0xFFFF0000), |
| ), |
| ); |
| |
| final RenderBox stack = new RenderStack(children: <RenderBox>[red, green]); |
| final StackParentData greenParentData = green.parentData; |
| greenParentData |
| ..top = 0.0 |
| ..right = 0.0 |
| ..bottom = 0.0 |
| ..left = 0.0; |
| |
| layout(stack, constraints: const BoxConstraints()); |
| |
| expect(stack.size.width, equals(100.0)); |
| expect(stack.size.height, equals(100.0)); |
| |
| expect(red.size.width, equals(100.0)); |
| expect(red.size.height, equals(100.0)); |
| |
| expect(green.size.width, equals(100.0)); |
| expect(green.size.height, equals(100.0)); |
| }); |
| |
| |
| group('RenderIndexedStack', () { |
| test('visitChildrenForSemantics only visits displayed child', () { |
| final RenderBox child1 = new RenderConstrainedBox( |
| additionalConstraints: new BoxConstraints.tight(const Size(100.0, 100.0)) |
| ); |
| final RenderBox child2 = new RenderConstrainedBox( |
| additionalConstraints: new BoxConstraints.tight(const Size(100.0, 100.0)) |
| ); |
| final RenderBox child3 = new RenderConstrainedBox( |
| additionalConstraints: new BoxConstraints.tight(const Size(100.0, 100.0)) |
| ); |
| final RenderBox stack = new RenderIndexedStack( |
| children: <RenderBox>[child1, child2, child3], |
| index: 1, |
| ); |
| |
| final List<RenderObject> vistedChildren = <RenderObject>[]; |
| final RenderObjectVisitor visitor = (RenderObject child) { |
| vistedChildren.add(child); |
| }; |
| |
| stack.visitChildrenForSemantics(visitor); |
| |
| expect(vistedChildren, hasLength(1)); |
| expect(vistedChildren.first, child2); |
| }); |
| |
| }); |
| |
| // More tests in ../widgets/stack_test.dart |
| } |