mirror of
https://github.com/flutter/flutter
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105 lines
3.6 KiB
Dart
105 lines
3.6 KiB
Dart
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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group('findsOneWidget', () {
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testWidgets('finds exactly one widget', (WidgetTester tester) async {
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await tester.pumpWidget(new Text('foo'));
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expect(find.text('foo'), findsOneWidget);
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});
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testWidgets('fails with a descriptive message', (WidgetTester tester) async {
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TestFailure failure;
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try {
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expect(find.text('foo', skipOffstage: false), findsOneWidget);
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} catch(e) {
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failure = e;
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}
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expect(failure, isNotNull);
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String message = failure.message;
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expect(message, contains('Expected: exactly one matching node in the widget tree\n'));
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expect(message, contains('Actual: ?:<zero widgets with text "foo">\n'));
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expect(message, contains('Which: means none were found but one was expected\n'));
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});
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});
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group('findsNothing', () {
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testWidgets('finds no widgets', (WidgetTester tester) async {
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expect(find.text('foo'), findsNothing);
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});
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testWidgets('fails with a descriptive message', (WidgetTester tester) async {
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await tester.pumpWidget(new Text('foo'));
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TestFailure failure;
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try {
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expect(find.text('foo', skipOffstage: false), findsNothing);
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} catch(e) {
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failure = e;
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}
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expect(failure, isNotNull);
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String message = failure.message;
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expect(message, contains('Expected: no matching nodes in the widget tree\n'));
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expect(message, contains('Actual: ?:<exactly one widget with text "foo": Text("foo")>\n'));
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expect(message, contains('Which: means one was found but none were expected\n'));
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});
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testWidgets('fails with a descriptive message when skipping', (WidgetTester tester) async {
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await tester.pumpWidget(new Text('foo'));
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TestFailure failure;
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try {
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expect(find.text('foo'), findsNothing);
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} catch(e) {
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failure = e;
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}
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expect(failure, isNotNull);
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String message = failure.message;
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expect(message, contains('Expected: no matching nodes in the widget tree\n'));
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expect(message, contains('Actual: ?:<exactly one widget with text "foo" (ignoring offstage widgets): Text("foo")>\n'));
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expect(message, contains('Which: means one was found but none were expected\n'));
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});
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testWidgets('pumping', (WidgetTester tester) async {
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await tester.pumpWidget(new Text('foo'));
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int count;
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AnimationController test = new AnimationController(duration: const Duration(milliseconds: 5100));
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count = await tester.pumpUntilNoTransientCallbacks(const Duration(seconds: 1));
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expect(count, 0);
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test.forward(from: 0.0);
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count = await tester.pumpUntilNoTransientCallbacks(const Duration(seconds: 1));
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// 1 frame at t=0, starting the animation
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// 1 frame at t=1
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// 1 frame at t=2
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// 1 frame at t=3
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// 1 frame at t=4
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// 1 frame at t=5
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// 1 frame at t=6, ending the animation
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expect(count, 7);
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test.forward(from: 0.0);
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await tester.pump(); // starts the animation
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count = await tester.pumpUntilNoTransientCallbacks(const Duration(seconds: 1));
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expect(count, 6);
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test.forward(from: 0.0);
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await tester.pump(); // starts the animation
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await tester.pump(); // has no effect
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count = await tester.pumpUntilNoTransientCallbacks(const Duration(seconds: 1));
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expect(count, 6);
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});
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});
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}
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