3053c0ad72
This will allow writing tests/benchmark which want to use the engine's default beginFrame and normal passage of time. @Hixie
58 lines
1.6 KiB
Dart
58 lines
1.6 KiB
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 'dart:ui' as ui;
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import 'package:quiver/testing/async.dart';
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import 'package:quiver/time.dart';
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import 'package:flutter/scheduler.dart';
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import 'package:flutter/widgets.dart';
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import 'instrumentation.dart';
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/// Helper class for fluter tests providing fake async.
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///
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/// This class extends Instrumentation to also abstract away the beginFrame
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/// and async/clock access to allow writing tests which depend on the passage
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/// of time without actually moving the clock forward.
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class WidgetTester extends Instrumentation {
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WidgetTester._(FakeAsync async)
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: async = async,
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clock = async.getClock(new DateTime.utc(2015, 1, 1)) {
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timeDilation = 1.0;
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ui.window.onBeginFrame = null;
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runApp(new ErrorWidget()); // flush out the last build entirely
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}
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final FakeAsync async;
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final Clock clock;
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void pumpWidget(Widget widget, [ Duration duration ]) {
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runApp(widget);
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pump(duration);
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}
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void setLocale(String languageCode, String countryCode) {
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ui.Locale locale = new ui.Locale(languageCode, countryCode);
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binding.dispatchLocaleChanged(locale);
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async.flushMicrotasks();
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}
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void pump([ Duration duration ]) {
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if (duration != null)
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async.elapse(duration);
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binding.handleBeginFrame(new Duration(
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milliseconds: clock.now().millisecondsSinceEpoch)
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);
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async.flushMicrotasks();
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}
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}
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void testWidgets(callback(WidgetTester tester)) {
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new FakeAsync().run((FakeAsync async) {
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callback(new WidgetTester._(async));
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});
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}
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