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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.
35 lines
1012 B
Dart
35 lines
1012 B
Dart
// Copyright 2015 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_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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List<String> ancestors = <String>[];
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class TestWidget extends StatefulWidget {
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@override
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TestWidgetState createState() => new TestWidgetState();
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}
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class TestWidgetState extends State<TestWidget> {
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@override
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void initState() {
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super.initState();
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context.visitAncestorElements((Element element) {
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ancestors.add(element.widget.runtimeType.toString());
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return true;
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});
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}
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@override
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Widget build(BuildContext context) => new Container();
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}
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void main() {
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testWidgets('initState() is called when we are in the tree', (WidgetTester tester) async {
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await tester.pumpWidget(new Container(child: new TestWidget()));
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expect(ancestors, equals(<String>['Container', 'RenderObjectToWidgetAdapter<RenderBox>']));
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});
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}
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