| // Copyright 2016 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/widgets.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| group('findsOneWidget', () { |
| testWidgets('finds exactly one widget', (WidgetTester tester) async { |
| await tester.pumpWidget(new Text('foo')); |
| expect(find.text('foo'), findsOneWidget); |
| }); |
| |
| testWidgets('fails with a descriptive message', (WidgetTester tester) async { |
| TestFailure failure; |
| try { |
| expect(find.text('foo'), findsOneWidget); |
| } catch(e) { |
| failure = e; |
| } |
| |
| expect(failure, isNotNull); |
| String message = failure.message; |
| expect(message, contains('Expected: exactly one matching node in the widget tree\n')); |
| expect(message, contains('Actual: ?:<zero widgets with text "foo">\n')); |
| expect(message, contains('Which: means none were found but one was expected\n')); |
| }); |
| }); |
| |
| group('findsNothing', () { |
| testWidgets('finds no widgets', (WidgetTester tester) async { |
| expect(find.text('foo'), findsNothing); |
| }); |
| |
| testWidgets('fails with a descriptive message', (WidgetTester tester) async { |
| await tester.pumpWidget(new Text('foo')); |
| |
| TestFailure failure; |
| try { |
| expect(find.text('foo'), findsNothing); |
| } catch(e) { |
| failure = e; |
| } |
| |
| expect(failure, isNotNull); |
| String message = failure.message; |
| |
| expect(message, contains('Expected: no matching nodes in the widget tree\n')); |
| expect(message, contains('Actual: ?:<exactly one widget with text "foo": Text("foo")>\n')); |
| expect(message, contains('Which: means one was found but none were expected\n')); |
| }); |
| }); |
| |
| } |