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[web] Implement AppLifecycleState.detached
as documented
#53506
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54 changes: 54 additions & 0 deletions
54
lib/web_ui/test/engine/platform_dispatcher/app_lifecycle_state_test.dart
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// Copyright 2013 The Flutter Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style license that can be | ||
// found in the LICENSE file. | ||
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import 'package:test/bootstrap/browser.dart'; | ||
import 'package:test/test.dart'; | ||
import 'package:ui/src/engine.dart'; | ||
import 'package:ui/ui.dart' as ui; | ||
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void main() { | ||
internalBootstrapBrowserTest(() => testMain); | ||
} | ||
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void testMain() { | ||
group(AppLifecycleState, () { | ||
test('listens to changes in view manager', () { | ||
final FlutterViewManager viewManager = FlutterViewManager(EnginePlatformDispatcher.instance); | ||
final AppLifecycleState state = AppLifecycleState.create(viewManager); | ||
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ui.AppLifecycleState? currentState; | ||
void listener(ui.AppLifecycleState newState) { | ||
currentState = newState; | ||
} | ||
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state.addListener(listener); | ||
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final view1 = EngineFlutterView(EnginePlatformDispatcher.instance, createDomHTMLDivElement()); | ||
viewManager.registerView(view1); | ||
expect(currentState, ui.AppLifecycleState.resumed); | ||
currentState = null; | ||
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final view2 = EngineFlutterView(EnginePlatformDispatcher.instance, createDomHTMLDivElement()); | ||
viewManager.registerView(view2); | ||
// The listener should not be called again. The view manager is still not empty. | ||
expect(currentState, isNull); | ||
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viewManager.disposeAndUnregisterView(view1.viewId); | ||
// The listener should not be called again. The view manager is still not empty. | ||
expect(currentState, isNull); | ||
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viewManager.disposeAndUnregisterView(view2.viewId); | ||
expect(currentState, ui.AppLifecycleState.detached); | ||
currentState = null; | ||
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final view3 = EngineFlutterView(EnginePlatformDispatcher.instance, createDomHTMLDivElement()); | ||
viewManager.registerView(view3); | ||
// The state should go back to `resumed` after a new view is registered. | ||
expect(currentState, ui.AppLifecycleState.resumed); | ||
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viewManager.dispose(); | ||
state.removeListener(listener); | ||
}); | ||
}); | ||
} |
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