01fe4e262a
Contributes to https://github.com/flutter/flutter/issues/137435. Will test cover and convert to 'ready for review' after getting agreement about the refactoring.
104 lines
2.8 KiB
Dart
104 lines
2.8 KiB
Dart
// Copyright 2014 The Flutter 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:flutter_test/flutter_test.dart';
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void main() {
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group('debugInstrumentAction', () {
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late DebugPrintCallback originalDebugPrintCallback;
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late StringBuffer printBuffer;
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setUp(() {
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debugInstrumentationEnabled = true;
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printBuffer = StringBuffer();
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originalDebugPrintCallback = debugPrint;
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debugPrint = (String? message, {int? wrapWidth}) {
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printBuffer.writeln(message);
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};
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});
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tearDown(() {
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debugInstrumentationEnabled = false;
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debugPrint = originalDebugPrintCallback;
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});
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test('works with non-failing actions', () async {
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final int result = await debugInstrumentAction<int>('no-op', () async {
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debugPrint('action()');
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return 1;
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});
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expect(result, 1);
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expect(
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printBuffer.toString(),
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matches(RegExp('^action\\(\\)\nAction "no-op" took .+\$', multiLine: true)),
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);
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});
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test('returns failing future if action throws', () async {
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await expectLater(
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() => debugInstrumentAction<void>('throws', () async {
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await Future<void>.delayed(Duration.zero);
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throw 'Error';
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}),
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throwsA('Error'),
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);
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expect(printBuffer.toString(), matches(r'^Action "throws" took .+'));
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});
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});
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group('Memory allocations', () {
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ObjectEvent? dispatchedEvent;
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final Object object = List<int>.filled(1, 0);
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void listener(ObjectEvent event) {
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expect(dispatchedEvent, null);
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dispatchedEvent = event;
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}
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setUp(() {
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dispatchedEvent = null;
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FlutterMemoryAllocations.instance.addListener(listener);
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});
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tearDown(() {
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FlutterMemoryAllocations.instance.removeListener(listener);
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});
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test('debugMaybeDispatchObjectCreated', () async {
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debugMaybeDispatchObjectCreated('library', 'class', object);
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if (kFlutterMemoryAllocationsEnabled) {
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final ObjectEvent? theEvent = dispatchedEvent;
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if (theEvent is! ObjectCreated) {
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fail('Expected ObjectCreated event');
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}
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expect(theEvent.object, object);
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expect(theEvent.library, 'library');
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expect(theEvent.className, 'class');
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} else {
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expect(dispatchedEvent, isNull);
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}
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});
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test('debugMaybeDispatchObjectDisposed', () async {
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debugMaybeDispatchObjectDisposed(object);
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if (kFlutterMemoryAllocationsEnabled) {
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final ObjectEvent? theEvent = dispatchedEvent;
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if (theEvent is! ObjectDisposed) {
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fail('Expected ObjectDisposed event');
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}
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expect(theEvent.object, object);
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} else {
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expect(dispatchedEvent, isNull);
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}
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});
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});
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}
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