49 lines
1.6 KiB
Dart
49 lines
1.6 KiB
Dart
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import 'package:flutter/rendering.dart';
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import 'package:flutter/widgets.dart';
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import 'package:test/test.dart';
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import 'widget_tester.dart';
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void main() {
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test('SizeObserver notices zero size', () {
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testWidgets((WidgetTester tester) {
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List<Size> results = <Size>[];
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tester.pumpWidget(new Center(
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child: new SizeObserver(
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callback: (Size size) { results.add(size); },
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child: new Container(width:0.0, height:0.0)
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)
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));
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expect(results, equals([Size.zero]));
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tester.pump();
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expect(results, equals([Size.zero]));
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tester.pumpWidget(new Center(
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child: new SizeObserver(
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callback: (Size size) { results.add(size); },
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child: new Container(width:100.0, height:0.0)
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)
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));
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expect(results, equals([Size.zero, const Size(100.0, 0.0)]));
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tester.pump();
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expect(results, equals([Size.zero, const Size(100.0, 0.0)]));
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tester.pumpWidget(new Center(
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child: new SizeObserver(
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callback: (Size size) { results.add(size); },
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child: new Container(width:0.0, height:0.0)
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)
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));
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expect(results, equals([Size.zero, const Size(100.0, 0.0), Size.zero]));
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tester.pump();
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expect(results, equals([Size.zero, const Size(100.0, 0.0), Size.zero]));
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tester.pumpWidget(new Center(
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child: new SizeObserver(
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callback: (Size size) { results.add(size); },
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child: new Container(width:0.0, height:0.0)
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)
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));
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expect(results, equals([Size.zero, const Size(100.0, 0.0), Size.zero]));
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});
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});
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}
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