| // 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/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| import '../rendering/mock_canvas.dart'; |
| |
| void main() { |
| testWidgets('overflow indicator is not shown when not overflowing', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Center( |
| child: UnconstrainedBox( |
| child: SizedBox(width: 200.0, height: 200.0), |
| ), |
| ), |
| ); |
| |
| expect(find.byType(UnconstrainedBox), isNot(paints..rect())); |
| }); |
| |
| testWidgets('overflow indicator is shown when overflowing', (WidgetTester tester) async { |
| const UnconstrainedBox box = UnconstrainedBox( |
| child: SizedBox(width: 200.0, height: 200.0), |
| ); |
| await tester.pumpWidget( |
| const Center( |
| child: SizedBox( |
| height: 100.0, |
| child: box, |
| ), |
| ), |
| ); |
| |
| final dynamic exception = tester.takeException(); |
| expect(exception, isFlutterError); |
| // ignore: avoid_dynamic_calls |
| expect(exception.diagnostics.first.level, DiagnosticLevel.summary); |
| // ignore: avoid_dynamic_calls |
| expect(exception.diagnostics.first.toString(), startsWith('A RenderConstraintsTransformBox overflowed by ')); |
| expect(find.byType(UnconstrainedBox), paints..rect()); |
| |
| await tester.pumpWidget( |
| const Center( |
| child: SizedBox( |
| height: 100.0, |
| child: box, |
| ), |
| ), |
| ); |
| |
| // Doesn't throw the exception a second time, because we didn't reset |
| // overflowReportNeeded. |
| expect(tester.takeException(), isNull); |
| expect(find.byType(UnconstrainedBox), paints..rect()); |
| }); |
| |
| testWidgets('overflow indicator is not shown when constraint size is zero.', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const Center( |
| child: SizedBox( |
| height: 0.0, |
| child: UnconstrainedBox( |
| child: SizedBox(width: 200.0, height: 200.0), |
| ), |
| ), |
| ), |
| ); |
| |
| expect(find.byType(UnconstrainedBox), isNot(paints..rect())); |
| }); |
| } |