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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.
76 lines
2.0 KiB
Dart
76 lines
2.0 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/foundation.dart';
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import 'package:test/test.dart';
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int yieldCount;
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Iterable<int> range(int start, int end) sync* {
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assert(yieldCount == 0);
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for (int index = start; index <= end; index += 1) {
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yieldCount += 1;
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yield index;
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}
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}
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void main() {
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setUp(() {
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yieldCount = 0;
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});
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test('The Caching Iterable: length caches', () {
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Iterable<int> i = new CachingIterable<int>(range(1, 5).iterator);
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expect(yieldCount, equals(0));
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expect(i.length, equals(5));
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expect(yieldCount, equals(5));
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expect(i.length, equals(5));
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expect(yieldCount, equals(5));
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expect(i.last, equals(5));
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expect(yieldCount, equals(5));
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expect(i, equals(<int>[1, 2, 3, 4, 5]));
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expect(yieldCount, equals(5));
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});
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test('The Caching Iterable: laziness', () {
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Iterable<int> i = new CachingIterable<int>(range(1, 5).iterator);
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expect(yieldCount, equals(0));
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expect(i.first, equals(1));
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expect(yieldCount, equals(1));
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expect(i.firstWhere((int i) => i == 3), equals(3));
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expect(yieldCount, equals(3));
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expect(i.last, equals(5));
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expect(yieldCount, equals(5));
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});
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test('The Caching Iterable: where and map', () {
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Iterable<int> integers = new CachingIterable<int>(range(1, 5).iterator);
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expect(yieldCount, equals(0));
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Iterable<int> evens = integers.where((int i) => i % 2 == 0);
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expect(yieldCount, equals(0));
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expect(evens.first, equals(2));
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expect(yieldCount, equals(2));
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expect(integers.first, equals(1));
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expect(yieldCount, equals(2));
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expect(evens.map((int i) => i + 1), equals(<int>[3, 5]));
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expect(yieldCount, equals(5));
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expect(evens, equals(<int>[2, 4]));
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expect(yieldCount, equals(5));
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expect(integers, equals(<int>[1, 2, 3, 4, 5]));
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expect(yieldCount, equals(5));
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});
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}
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