// 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('Overconstrained flex', () { RenderDecoratedBox box = new RenderDecoratedBox(decoration: new BoxDecoration()); RenderFlex flex = new RenderFlex(children: <RenderBox>[box]); layout(flex, constraints: const BoxConstraints( minWidth: 200.0, maxWidth: 200.0, minHeight: 200.0, maxHeight: 200.0) ); expect(flex.size.width, equals(200.0), reason: "flex width"); expect(flex.size.height, equals(200.0), reason: "flex height"); }); test('Defaults', () { RenderFlex flex = new RenderFlex(); expect(flex.alignItems, equals(FlexAlignItems.center)); expect(flex.direction, equals(FlexDirection.horizontal)); }); test('Parent data', () { RenderDecoratedBox box1 = new RenderDecoratedBox(decoration: new BoxDecoration()); RenderDecoratedBox box2 = new RenderDecoratedBox(decoration: new BoxDecoration()); RenderFlex flex = new RenderFlex(children: <RenderBox>[box1, box2]); layout(flex, constraints: const BoxConstraints( minWidth: 0.0, maxWidth: 100.0, minHeight: 0.0, maxHeight: 100.0) ); expect(box1.size.width, equals(0.0)); expect(box1.size.height, equals(0.0)); expect(box2.size.width, equals(0.0)); expect(box2.size.height, equals(0.0)); final FlexParentData box2ParentData = box2.parentData; box2ParentData.flex = 1; flex.markNeedsLayout(); pumpFrame(); expect(box1.size.width, equals(0.0)); expect(box1.size.height, equals(0.0)); expect(box2.size.width, equals(100.0)); expect(box2.size.height, equals(0.0)); }); test('Stretch', () { RenderDecoratedBox box1 = new RenderDecoratedBox(decoration: new BoxDecoration()); RenderDecoratedBox box2 = new RenderDecoratedBox(decoration: new BoxDecoration()); RenderFlex flex = new RenderFlex(); flex.setupParentData(box2); final FlexParentData box2ParentData = box2.parentData; box2ParentData.flex = 2; flex.addAll(<RenderBox>[box1, box2]); layout(flex, constraints: const BoxConstraints( minWidth: 0.0, maxWidth: 100.0, minHeight: 0.0, maxHeight: 100.0) ); expect(box1.size.width, equals(0.0)); expect(box1.size.height, equals(0.0)); expect(box2.size.width, equals(100.0)); expect(box2.size.height, equals(0.0)); flex.alignItems = FlexAlignItems.stretch; pumpFrame(); expect(box1.size.width, equals(0.0)); expect(box1.size.height, equals(100.0)); expect(box2.size.width, equals(100.0)); expect(box2.size.height, equals(100.0)); flex.direction = FlexDirection.vertical; pumpFrame(); expect(box1.size.width, equals(100.0)); expect(box1.size.height, equals(0.0)); expect(box2.size.width, equals(100.0)); expect(box2.size.height, equals(100.0)); }); }