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3252701753
This makes it possible to substitute 'flutter run' for 'flutter test'
and actually watch a test run on a device.
For any test that depends on flutter_test:
1. Remove any import of 'package:test/test.dart'.
2. Replace `testWidgets('...', (WidgetTester tester) {`
with `testWidgets('...', (WidgetTester tester) async {`
3. Add an "await" in front of calls to any of the following:
* tap()
* tapAt()
* fling()
* flingFrom()
* scroll()
* scrollAt()
* pump()
* pumpWidget()
4. Replace any calls to `tester.flushMicrotasks()` with calls to
`await tester.idle()`.
There's a guarding API that you can use, if you have particularly
complicated tests, to get better error messages. Search for
TestAsyncUtils.
56 lines
1.8 KiB
Dart
56 lines
1.8 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'), 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'), 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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});
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}
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