| // 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 'dart:async'; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/rendering.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| void main() { |
| testWidgets('Positioned constructors', (WidgetTester tester) async { |
| final Widget child = new Container(); |
| final Positioned a = new Positioned( |
| left: 101.0, |
| right: 201.0, |
| top: 301.0, |
| bottom: 401.0, |
| child: child, |
| ); |
| expect(a.left, 101.0); |
| expect(a.right, 201.0); |
| expect(a.top, 301.0); |
| expect(a.bottom, 401.0); |
| expect(a.width, null); |
| expect(a.height, null); |
| final Positioned b = new Positioned.fromRect( |
| rect: new Rect.fromLTRB( |
| 102.0, |
| 302.0, |
| 202.0, |
| 502.0, |
| ), |
| child: child, |
| ); |
| expect(b.left, 102.0); |
| expect(b.right, null); |
| expect(b.top, 302.0); |
| expect(b.bottom, null); |
| expect(b.width, 100.0); |
| expect(b.height, 200.0); |
| final Positioned c = new Positioned.fromRelativeRect( |
| rect: const RelativeRect.fromLTRB( |
| 103.0, |
| 303.0, |
| 203.0, |
| 403.0, |
| ), |
| child: child, |
| ); |
| expect(c.left, 103.0); |
| expect(c.right, 203.0); |
| expect(c.top, 303.0); |
| expect(c.bottom, 403.0); |
| expect(c.width, null); |
| expect(c.height, null); |
| }); |
| |
| testWidgets('Can animate position data', (WidgetTester tester) async { |
| final RelativeRectTween rect = new RelativeRectTween( |
| begin: new RelativeRect.fromRect( |
| new Rect.fromLTRB(10.0, 20.0, 20.0, 30.0), |
| new Rect.fromLTRB(0.0, 10.0, 100.0, 110.0), |
| ), |
| end: new RelativeRect.fromRect( |
| new Rect.fromLTRB(80.0, 90.0, 90.0, 100.0), |
| new Rect.fromLTRB(0.0, 10.0, 100.0, 110.0), |
| ) |
| ); |
| final AnimationController controller = new AnimationController( |
| duration: const Duration(seconds: 10), |
| vsync: tester, |
| ); |
| final List<Size> sizes = <Size>[]; |
| final List<Offset> positions = <Offset>[]; |
| final GlobalKey key = new GlobalKey(); |
| |
| void recordMetrics() { |
| final RenderBox box = key.currentContext.findRenderObject(); |
| final BoxParentData boxParentData = box.parentData; |
| sizes.add(box.size); |
| positions.add(boxParentData.offset); |
| } |
| |
| await tester.pumpWidget( |
| new Directionality( |
| textDirection: TextDirection.ltr, |
| child: new Center( |
| child: new Container( |
| height: 100.0, |
| width: 100.0, |
| child: new Stack( |
| children: <Widget>[ |
| new PositionedTransition( |
| rect: rect.animate(controller), |
| child: new Container( |
| key: key, |
| ), |
| ), |
| ], |
| ), |
| ), |
| ), |
| ), |
| ); // t=0 |
| recordMetrics(); |
| final Completer<Null> completer = new Completer<Null>(); |
| controller.forward().whenComplete(completer.complete); |
| expect(completer.isCompleted, isFalse); |
| await tester.pump(); // t=0 again |
| expect(completer.isCompleted, isFalse); |
| recordMetrics(); |
| await tester.pump(const Duration(seconds: 1)); // t=1 |
| expect(completer.isCompleted, isFalse); |
| recordMetrics(); |
| await tester.pump(const Duration(seconds: 1)); // t=2 |
| expect(completer.isCompleted, isFalse); |
| recordMetrics(); |
| await tester.pump(const Duration(seconds: 3)); // t=5 |
| expect(completer.isCompleted, isFalse); |
| recordMetrics(); |
| await tester.pump(const Duration(seconds: 5)); // t=10 |
| expect(completer.isCompleted, isFalse); |
| recordMetrics(); |
| |
| expect(sizes, equals(<Size>[const Size(10.0, 10.0), const Size(10.0, 10.0), const Size(10.0, 10.0), const Size(10.0, 10.0), const Size(10.0, 10.0), const Size(10.0, 10.0)])); |
| expect(positions, equals(<Offset>[const Offset(10.0, 10.0), const Offset(10.0, 10.0), const Offset(17.0, 17.0), const Offset(24.0, 24.0), const Offset(45.0, 45.0), const Offset(80.0, 80.0)])); |
| |
| controller.stop(canceled: false); |
| await tester.pump(); |
| expect(completer.isCompleted, isTrue); |
| }); |
| } |