service_extensions_test.dart 41.2 KB
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// 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
// found in the LICENSE file.

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// TODO(gspencergoog): Remove this tag once this test's state leaks/test
// dependencies have been fixed.
// https://github.com/flutter/flutter/issues/85160
// Fails with "flutter test --test-randomize-ordering-seed=123"
@Tags(<String>['no-shuffle'])

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import 'dart:async';
import 'dart:convert';
import 'dart:ui' as ui;

import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class TestServiceExtensionsBinding extends BindingBase
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  with SchedulerBinding,
       ServicesBinding,
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       GestureBinding,
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       PaintingBinding,
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       SemanticsBinding,
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       RendererBinding,
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       WidgetsBinding,
       TestDefaultBinaryMessengerBinding {
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  final Map<String, ServiceExtensionCallback> extensions = <String, ServiceExtensionCallback>{};

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  final Map<String, List<Map<String, dynamic>>> eventsDispatched = <String, List<Map<String, dynamic>>>{};

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  @override
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  @protected
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  void registerServiceExtension({
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    required String name,
    required ServiceExtensionCallback callback,
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  }) {
    expect(extensions.containsKey(name), isFalse);
    extensions[name] = callback;
  }

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  @override
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  void postEvent(String eventKind, Map<String, dynamic> eventData) {
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    getEventsDispatched(eventKind).add(eventData);
  }

  List<Map<String, dynamic>> getEventsDispatched(String eventKind) {
    return eventsDispatched.putIfAbsent(eventKind, () => <Map<String, dynamic>>[]);
  }

  Iterable<Map<String, dynamic>> getServiceExtensionStateChangedEvents(String extensionName) {
    return getEventsDispatched('Flutter.ServiceExtensionStateChanged')
      .where((Map<String, dynamic> event) => event['extension'] == extensionName);
  }

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  Future<Map<String, dynamic>> testExtension(String name, Map<String, String> arguments) {
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    expect(extensions.containsKey(name), isTrue);
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    return extensions[name]!(arguments);
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  }

  int reassembled = 0;
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  bool pendingReassemble = false;
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  @override
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  Future<void> performReassemble() {
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    reassembled += 1;
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    pendingReassemble = true;
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    return super.performReassemble();
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  }

  bool frameScheduled = false;
  @override
  void scheduleFrame() {
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    ensureFrameCallbacksRegistered();
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    frameScheduled = true;
  }
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  Future<void> doFrame() async {
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    frameScheduled = false;
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    binding.platformDispatcher.onBeginFrame?.call(Duration.zero);
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    await flushMicrotasks();
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    binding.platformDispatcher.onDrawFrame?.call();
    binding.platformDispatcher.onReportTimings?.call(<ui.FrameTiming>[]);
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  }

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  @override
  void scheduleForcedFrame() {
    expect(true, isFalse);
  }

  @override
  void scheduleWarmUpFrame() {
    expect(pendingReassemble, isTrue);
    pendingReassemble = false;
  }

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  Future<void> flushMicrotasks() {
    final Completer<void> completer = Completer<void>();
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    Timer.run(completer.complete);
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    return completer.future;
  }
}

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late TestServiceExtensionsBinding binding;
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Future<Map<String, dynamic>> hasReassemble(Future<Map<String, dynamic>> pendingResult) async {
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  bool completed = false;
  pendingResult.whenComplete(() { completed = true; });
  expect(binding.frameScheduled, isFalse);
  await binding.flushMicrotasks();
  expect(binding.frameScheduled, isTrue);
  expect(completed, isFalse);
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  await binding.flushMicrotasks();
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  await binding.doFrame();
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  await binding.flushMicrotasks();
  expect(completed, isTrue);
  expect(binding.frameScheduled, isFalse);
  return pendingResult;
}

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void main() {
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  final List<String?> console = <String?>[];
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  setUpAll(() async {
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    binding = TestServiceExtensionsBinding()..scheduleFrame();
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    expect(binding.frameScheduled, isTrue);
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    // We need to test this service extension here because the result is true
    // after the first binding.doFrame() call.
    Map<String, dynamic> firstFrameResult;
    expect(binding.debugDidSendFirstFrameEvent, isFalse);
    firstFrameResult = await binding.testExtension('didSendFirstFrameEvent', <String, String>{});
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    expect(firstFrameResult, <String, String>{'enabled': 'false'});
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    expect(binding.firstFrameRasterized, isFalse);
    firstFrameResult = await binding.testExtension('didSendFirstFrameRasterizedEvent', <String, String>{});
    expect(firstFrameResult, <String, String>{'enabled': 'false'});

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    await binding.doFrame();
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    expect(binding.debugDidSendFirstFrameEvent, isTrue);
    firstFrameResult = await binding.testExtension('didSendFirstFrameEvent', <String, String>{});
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    expect(firstFrameResult, <String, String>{'enabled': 'true'});
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    expect(binding.firstFrameRasterized, isTrue);
    firstFrameResult = await binding.testExtension('didSendFirstFrameRasterizedEvent', <String, String>{});
    expect(firstFrameResult, <String, String>{'enabled': 'true'});

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    expect(binding.frameScheduled, isFalse);

    expect(debugPrint, equals(debugPrintThrottled));
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    debugPrint = (String? message, { int? wrapWidth }) {
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      console.add(message);
    };
  });

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  tearDownAll(() async {
    // See widget_inspector_test.dart for tests of the ext.flutter.inspector
    // service extensions included in this count.
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    int widgetInspectorExtensionCount = 16;
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    if (WidgetInspectorService.instance.isWidgetCreationTracked()) {
      // Some inspector extensions are only exposed if widget creation locations
      // are tracked.
      widgetInspectorExtensionCount += 2;
    }

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    // The following service extensions are disabled in web:
    // 1. exit
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    // 2. showPerformanceOverlay
    const int disabledExtensions = kIsWeb ? 2 : 0;
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    // If you add a service extension... TEST IT! :-)
    // ...then increment this number.
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    expect(binding.extensions.length, 35 + widgetInspectorExtensionCount - disabledExtensions);
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    expect(console, isEmpty);
    debugPrint = debugPrintThrottled;
  });

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  // The following list is alphabetical, one test per extension.

  test('Service extensions - debugAllowBanner', () async {
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    Map<String, dynamic> result;
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    expect(binding.frameScheduled, isFalse);
    expect(WidgetsApp.debugAllowBannerOverride, true);
    result = await binding.testExtension('debugAllowBanner', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.debugAllowBannerOverride, true);
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    result = await binding.testExtension('debugAllowBanner', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.debugAllowBannerOverride, false);
    result = await binding.testExtension('debugAllowBanner', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.debugAllowBannerOverride, false);
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    result = await binding.testExtension('debugAllowBanner', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.debugAllowBannerOverride, true);
    result = await binding.testExtension('debugAllowBanner', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.debugAllowBannerOverride, true);
    expect(binding.frameScheduled, isFalse);
  });

  test('Service extensions - debugDumpApp', () async {
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    final Map<String, dynamic> result = await binding.testExtension('debugDumpApp', <String, String>{});
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    expect(result, <String, dynamic>{
      'data': matches('TestServiceExtensionsBinding - DEBUG MODE\n<no tree currently mounted>'),
    });
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  });

  test('Service extensions - debugDumpRenderTree', () async {
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    await binding.doFrame();
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    final Map<String, dynamic> result = await binding.testExtension('debugDumpRenderTree', <String, String>{});

    expect(result, <String, dynamic>{
      'data': matches(
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        r'^'
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        r'RenderView#[0-9a-f]{5}\n'
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        r'   debug mode enabled - [a-zA-Z]+\n'
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        r'   window size: Size\(2400\.0, 1800\.0\) \(in physical pixels\)\n'
        r'   device pixel ratio: 3\.0 \(physical pixels per logical pixel\)\n'
        r'   configuration: Size\(800\.0, 600\.0\) at 3\.0x \(in logical pixels\)\n'
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        r'$',
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      ),
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    });
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  });

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  test('Service extensions - debugDumpLayerTree', () async {
    await binding.doFrame();
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    final Map<String, dynamic> result = await binding.testExtension('debugDumpLayerTree', <String, String>{});

    expect(result, <String, dynamic>{
      'data': matches(
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        r'^'
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        r'TransformLayer#[0-9a-f]{5}\n'
        r'   owner: RenderView#[0-9a-f]{5}\n'
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        r'   creator: RenderView\n'
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        r'   engine layer: (TransformEngineLayer|PersistedTransform)#[0-9a-f]{5}\n'
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        r'   handles: 1\n'
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        r'   offset: Offset\(0\.0, 0\.0\)\n'
        r'   transform:\n'
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        r'     \[0] 3\.0,0\.0,0\.0,0\.0\n'
        r'     \[1] 0\.0,3\.0,0\.0,0\.0\n'
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        r'     \[2] 0\.0,0\.0,1\.0,0\.0\n'
        r'     \[3] 0\.0,0\.0,0\.0,1\.0\n'
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        r'$',
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      ),
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    });
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  });

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  test('Service extensions - debugDumpSemanticsTreeInTraversalOrder', () async {
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    await binding.doFrame();
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    final Map<String, dynamic> result = await binding.testExtension('debugDumpSemanticsTreeInTraversalOrder', <String, String>{});

    expect(result, <String, String>{
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      'data': 'Semantics not collected.',
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    });
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  });

  test('Service extensions - debugDumpSemanticsTreeInInverseHitTestOrder', () async {
    await binding.doFrame();
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    final Map<String, dynamic> result = await binding.testExtension('debugDumpSemanticsTreeInInverseHitTestOrder', <String, String>{});

    expect(result, <String, String>{
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      'data': 'Semantics not collected.',
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    });
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  });

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  test('Service extensions - debugPaint', () async {
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    final Iterable<Map<String, dynamic>> extensionChangedEvents = binding.getServiceExtensionStateChangedEvents('ext.flutter.debugPaint');
    Map<String, dynamic> extensionChangedEvent;
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    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
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    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugPaintSizeEnabled, false);
    result = await binding.testExtension('debugPaint', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintSizeEnabled, false);
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    expect(extensionChangedEvents, isEmpty);
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    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('debugPaint', <String, String>{'enabled': 'true'});
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    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
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    await binding.doFrame();
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    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugPaintSizeEnabled, true);
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    expect(extensionChangedEvents.length, 1);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.debugPaint');
    expect(extensionChangedEvent['value'], 'true');
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    result = await binding.testExtension('debugPaint', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugPaintSizeEnabled, true);
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    expect(extensionChangedEvents.length, 1);
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    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('debugPaint', <String, String>{'enabled': 'false'});
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    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
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    await binding.doFrame();
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    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintSizeEnabled, false);
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    expect(extensionChangedEvents.length, 2);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.debugPaint');
    expect(extensionChangedEvent['value'], 'false');
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    result = await binding.testExtension('debugPaint', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintSizeEnabled, false);
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    expect(extensionChangedEvents.length, 2);
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    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - debugPaintBaselinesEnabled', () async {
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    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
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    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugPaintBaselinesEnabled, false);
    result = await binding.testExtension('debugPaintBaselinesEnabled', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintBaselinesEnabled, false);
    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('debugPaintBaselinesEnabled', <String, String>{'enabled': 'true'});
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    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
    await binding.doFrame();
    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugPaintBaselinesEnabled, true);
    result = await binding.testExtension('debugPaintBaselinesEnabled', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugPaintBaselinesEnabled, true);
    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('debugPaintBaselinesEnabled', <String, String>{'enabled': 'false'});
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    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    await binding.doFrame();
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintBaselinesEnabled, false);
    result = await binding.testExtension('debugPaintBaselinesEnabled', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugPaintBaselinesEnabled, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - invertOversizedImages', () async {
    Map<String, dynamic> result;
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    Future<Map<String, dynamic>> pendingResult;
    bool completed;
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    expect(binding.frameScheduled, isFalse);
    expect(debugInvertOversizedImages, false);
    result = await binding.testExtension('invertOversizedImages', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugInvertOversizedImages, false);
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    expect(binding.frameScheduled, isFalse);

    pendingResult = binding.testExtension('invertOversizedImages', <String, String>{'enabled': 'true'});
    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
    await binding.doFrame();
    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'true'});
    expect(debugInvertOversizedImages, true);
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    result = await binding.testExtension('invertOversizedImages', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugInvertOversizedImages, true);
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    expect(binding.frameScheduled, isFalse);

    pendingResult = binding.testExtension('invertOversizedImages', <String, String>{'enabled': 'false'});
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    await binding.doFrame();
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'false'});
    expect(debugInvertOversizedImages, false);
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    result = await binding.testExtension('invertOversizedImages', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugInvertOversizedImages, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - profileWidgetBuilds', () async {
    Map<String, dynamic> result;

    expect(binding.frameScheduled, isFalse);
    expect(debugProfileBuildsEnabled, false);

    result = await binding.testExtension('profileWidgetBuilds', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugProfileBuildsEnabled, false);

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    result = await binding.testExtension('profileWidgetBuilds', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugProfileBuildsEnabled, true);

    result = await binding.testExtension('profileWidgetBuilds', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugProfileBuildsEnabled, true);

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    result = await binding.testExtension('profileWidgetBuilds', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugProfileBuildsEnabled, false);

    result = await binding.testExtension('profileWidgetBuilds', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugProfileBuildsEnabled, false);

    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - profileRenderObjectPaints', () async {
    Map<String, dynamic> result;

    expect(binding.frameScheduled, isFalse);
    expect(debugProfileBuildsEnabled, false);

    result = await binding.testExtension('profileRenderObjectPaints', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfilePaintsEnabled, false);

    result = await binding.testExtension('profileRenderObjectPaints', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugProfilePaintsEnabled, true);

    result = await binding.testExtension('profileRenderObjectPaints', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugProfilePaintsEnabled, true);

    result = await binding.testExtension('profileRenderObjectPaints', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfilePaintsEnabled, false);

    result = await binding.testExtension('profileRenderObjectPaints', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfilePaintsEnabled, false);

    expect(binding.frameScheduled, isFalse);
  });

  test('Service extensions - profileRenderObjectLayouts', () async {
    Map<String, dynamic> result;

    expect(binding.frameScheduled, isFalse);
    expect(debugProfileLayoutsEnabled, false);

    result = await binding.testExtension('profileRenderObjectLayouts', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfileLayoutsEnabled, false);

    result = await binding.testExtension('profileRenderObjectLayouts', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugProfileLayoutsEnabled, true);

    result = await binding.testExtension('profileRenderObjectLayouts', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugProfileLayoutsEnabled, true);

    result = await binding.testExtension('profileRenderObjectLayouts', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfileLayoutsEnabled, false);

    result = await binding.testExtension('profileRenderObjectLayouts', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugProfileLayoutsEnabled, false);

    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - evict', () async {
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    Map<String, dynamic> result;
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    bool completed;

    completed = false;
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    TestDefaultBinaryMessengerBinding.instance!.defaultBinaryMessenger.setMockMessageHandler('flutter/assets', (ByteData? message) async {
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      expect(utf8.decode(message!.buffer.asUint8List()), 'test');
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      completed = true;
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      return ByteData(5); // 0x0000000000
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    });
    bool data;
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    data = await rootBundle.loadStructuredData<bool>('test', (String value) async {
      expect(value, '\x00\x00\x00\x00\x00');
      return true;
    });
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    expect(data, isTrue);
    expect(completed, isTrue);
    completed = false;
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    data = await rootBundle.loadStructuredData('test', (String value) async {
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      throw Error();
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    });
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    expect(data, isTrue);
    expect(completed, isFalse);
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    result = await binding.testExtension('evict', <String, String>{'value': 'test'});
    expect(result, <String, String>{'value': ''});
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    expect(completed, isFalse);
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    data = await rootBundle.loadStructuredData<bool>('test', (String value) async {
      expect(value, '\x00\x00\x00\x00\x00');
      return false;
    });
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    expect(data, isFalse);
    expect(completed, isTrue);
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    TestDefaultBinaryMessengerBinding.instance!.defaultBinaryMessenger.setMockMessageHandler('flutter/assets', null);
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  });

  test('Service extensions - exit', () async {
    // no test for _calling_ 'exit', because that should terminate the process!
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    // Not expecting extension to be available for web platform.
    expect(binding.extensions.containsKey('exit'), !isBrowser);
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  });

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  test('Service extensions - platformOverride', () async {
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    final Iterable<Map<String, dynamic>> extensionChangedEvents = binding.getServiceExtensionStateChangedEvents('ext.flutter.platformOverride');
    Map<String, dynamic> extensionChangedEvent;
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    Map<String, dynamic> result;
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    expect(binding.reassembled, 0);
    expect(defaultTargetPlatform, TargetPlatform.android);
    result = await binding.testExtension('platformOverride', <String, String>{});
    expect(result, <String, String>{'value': 'android'});
    expect(defaultTargetPlatform, TargetPlatform.android);
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    expect(extensionChangedEvents, isEmpty);
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'iOS'}));
    expect(result, <String, String>{'value': 'iOS'});
    expect(binding.reassembled, 1);
    expect(defaultTargetPlatform, TargetPlatform.iOS);
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    expect(extensionChangedEvents.length, 1);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'iOS');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'macOS'}));
    expect(result, <String, String>{'value': 'macOS'});
    expect(binding.reassembled, 2);
    expect(defaultTargetPlatform, TargetPlatform.macOS);
    expect(extensionChangedEvents.length, 2);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'macOS');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'android'}));
    expect(result, <String, String>{'value': 'android'});
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    expect(binding.reassembled, 3);
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    expect(defaultTargetPlatform, TargetPlatform.android);
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    expect(extensionChangedEvents.length, 3);
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    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'android');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'fuchsia'}));
    expect(result, <String, String>{'value': 'fuchsia'});
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    expect(binding.reassembled, 4);
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    expect(defaultTargetPlatform, TargetPlatform.fuchsia);
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    expect(extensionChangedEvents.length, 4);
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    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'fuchsia');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'default'}));
    expect(result, <String, String>{'value': 'android'});
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    expect(binding.reassembled, 5);
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    expect(defaultTargetPlatform, TargetPlatform.android);
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    expect(extensionChangedEvents.length, 5);
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    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'android');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'iOS'}));
    expect(result, <String, String>{'value': 'iOS'});
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    expect(binding.reassembled, 6);
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    expect(defaultTargetPlatform, TargetPlatform.iOS);
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    expect(extensionChangedEvents.length, 6);
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    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'iOS');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'linux'}));
    expect(result, <String, String>{'value': 'linux'});
    expect(binding.reassembled, 7);
    expect(defaultTargetPlatform, TargetPlatform.linux);
    expect(extensionChangedEvents.length, 7);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'linux');
    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'windows'}));
    expect(result, <String, String>{'value': 'windows'});
    expect(binding.reassembled, 8);
    expect(defaultTargetPlatform, TargetPlatform.windows);
    expect(extensionChangedEvents.length, 8);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'windows');
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    result = await hasReassemble(binding.testExtension('platformOverride', <String, String>{'value': 'bogus'}));
    expect(result, <String, String>{'value': 'android'});
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    expect(binding.reassembled, 9);
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    expect(defaultTargetPlatform, TargetPlatform.android);
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    expect(extensionChangedEvents.length, 9);
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    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.platformOverride');
    expect(extensionChangedEvent['value'], 'android');
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    binding.reassembled = 0;
  });

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  test('Service extensions - repaintRainbow', () async {
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    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
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    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugRepaintRainbowEnabled, false);
    result = await binding.testExtension('repaintRainbow', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugRepaintRainbowEnabled, false);
    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('repaintRainbow', <String, String>{'enabled': 'true'});
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    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(completed, true);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugRepaintRainbowEnabled, true);
    result = await binding.testExtension('repaintRainbow', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(debugRepaintRainbowEnabled, true);
    expect(binding.frameScheduled, isFalse);
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    pendingResult = binding.testExtension('repaintRainbow', <String, String>{'enabled': 'false'});
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    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(completed, false);
    expect(binding.frameScheduled, isTrue);
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    await binding.doFrame();
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    await binding.flushMicrotasks();
    expect(completed, true);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugRepaintRainbowEnabled, false);
    result = await binding.testExtension('repaintRainbow', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(debugRepaintRainbowEnabled, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - debugDisableClipLayers', () async {
    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugDisableClipLayers, false);
    result = await binding.testExtension('debugDisableClipLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableClipLayers, false);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisableClipLayers', <String, String>{'enabled': 'true'});
    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
    await binding.doFrame();
    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisableClipLayers, true);
    result = await binding.testExtension('debugDisableClipLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisableClipLayers, true);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisableClipLayers', <String, String>{'enabled': 'false'});
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    await binding.doFrame();
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableClipLayers, false);
    result = await binding.testExtension('debugDisableClipLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableClipLayers, false);
    expect(binding.frameScheduled, isFalse);
  });

  test('Service extensions - debugDisablePhysicalShapeLayers', () async {
    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugDisablePhysicalShapeLayers, false);
    result = await binding.testExtension('debugDisablePhysicalShapeLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisablePhysicalShapeLayers, false);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisablePhysicalShapeLayers', <String, String>{'enabled': 'true'});
    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
    await binding.doFrame();
    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisablePhysicalShapeLayers, true);
    result = await binding.testExtension('debugDisablePhysicalShapeLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisablePhysicalShapeLayers, true);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisablePhysicalShapeLayers', <String, String>{'enabled': 'false'});
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    await binding.doFrame();
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisablePhysicalShapeLayers, false);
    result = await binding.testExtension('debugDisablePhysicalShapeLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisablePhysicalShapeLayers, false);
    expect(binding.frameScheduled, isFalse);
  });

  test('Service extensions - debugDisableOpacityLayers', () async {
    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
    bool completed;

    expect(binding.frameScheduled, isFalse);
    expect(debugDisableOpacityLayers, false);
    result = await binding.testExtension('debugDisableOpacityLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableOpacityLayers, false);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisableOpacityLayers', <String, String>{'enabled': 'true'});
    completed = false;
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, isFalse);
    await binding.doFrame();
    await binding.flushMicrotasks();
    expect(completed, isTrue);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisableOpacityLayers, true);
    result = await binding.testExtension('debugDisableOpacityLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'true'});
    expect(debugDisableOpacityLayers, true);
    expect(binding.frameScheduled, isFalse);
    pendingResult = binding.testExtension('debugDisableOpacityLayers', <String, String>{'enabled': 'false'});
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    await binding.doFrame();
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableOpacityLayers, false);
    result = await binding.testExtension('debugDisableOpacityLayers', <String, String>{});
    expect(result, <String, String>{'enabled': 'false'});
    expect(debugDisableOpacityLayers, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - reassemble', () async {
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    Map<String, dynamic> result;
    Future<Map<String, dynamic>> pendingResult;
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    bool completed;

    completed = false;
    expect(binding.reassembled, 0);
    pendingResult = binding.testExtension('reassemble', <String, String>{});
    pendingResult.whenComplete(() { completed = true; });
    await binding.flushMicrotasks();
    expect(binding.frameScheduled, isTrue);
    expect(completed, false);
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    await binding.flushMicrotasks();
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    await binding.doFrame();
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    await binding.flushMicrotasks();
    expect(completed, true);
    expect(binding.frameScheduled, isFalse);
    result = await pendingResult;
    expect(result, <String, String>{});
    expect(binding.reassembled, 1);
  });

  test('Service extensions - showPerformanceOverlay', () async {
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    Map<String, dynamic> result;
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    // The performance overlay service extension is disabled on the web.
    if (kIsWeb) {
      expect(binding.extensions.containsKey('showPerformanceOverlay'), isFalse);
      return;
    }

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    expect(binding.frameScheduled, isFalse);
    expect(WidgetsApp.showPerformanceOverlayOverride, false);
    result = await binding.testExtension('showPerformanceOverlay', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.showPerformanceOverlayOverride, false);
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    result = await binding.testExtension('showPerformanceOverlay', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.showPerformanceOverlayOverride, true);
    result = await binding.testExtension('showPerformanceOverlay', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.showPerformanceOverlayOverride, true);
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    result = await binding.testExtension('showPerformanceOverlay', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.showPerformanceOverlayOverride, false);
    result = await binding.testExtension('showPerformanceOverlay', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.showPerformanceOverlayOverride, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - debugWidgetInspector', () async {
    Map<String, dynamic> result;
    expect(binding.frameScheduled, isFalse);
    expect(WidgetsApp.debugShowWidgetInspectorOverride, false);
    result = await binding.testExtension('debugWidgetInspector', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.debugShowWidgetInspectorOverride, false);
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    result = await binding.testExtension('debugWidgetInspector', <String, String>{'enabled': 'true'});
    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.debugShowWidgetInspectorOverride, true);
    result = await binding.testExtension('debugWidgetInspector', <String, String>{});
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    expect(result, <String, String>{'enabled': 'true'});
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    expect(WidgetsApp.debugShowWidgetInspectorOverride, true);
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    result = await binding.testExtension('debugWidgetInspector', <String, String>{'enabled': 'false'});
    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.debugShowWidgetInspectorOverride, false);
    result = await binding.testExtension('debugWidgetInspector', <String, String>{});
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    expect(result, <String, String>{'enabled': 'false'});
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    expect(WidgetsApp.debugShowWidgetInspectorOverride, false);
    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - timeDilation', () async {
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    final Iterable<Map<String, dynamic>> extensionChangedEvents = binding.getServiceExtensionStateChangedEvents('ext.flutter.timeDilation');
    Map<String, dynamic> extensionChangedEvent;
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    Map<String, dynamic> result;
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    expect(binding.frameScheduled, isFalse);
    expect(timeDilation, 1.0);
    result = await binding.testExtension('timeDilation', <String, String>{});
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    expect(result, <String, String>{'timeDilation': 1.0.toString()});
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    expect(timeDilation, 1.0);
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    expect(extensionChangedEvents, isEmpty);
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    result = await binding.testExtension('timeDilation', <String, String>{'timeDilation': '100.0'});
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    expect(result, <String, String>{'timeDilation': 100.0.toString()});
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    expect(timeDilation, 100.0);
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    expect(extensionChangedEvents.length, 1);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.timeDilation');
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    expect(extensionChangedEvent['value'], 100.0.toString());
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    result = await binding.testExtension('timeDilation', <String, String>{});
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    expect(result, <String, String>{'timeDilation': 100.0.toString()});
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    expect(timeDilation, 100.0);
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    expect(extensionChangedEvents.length, 1);
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    result = await binding.testExtension('timeDilation', <String, String>{'timeDilation': '1.0'});
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    expect(result, <String, String>{'timeDilation': 1.0.toString()});
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    expect(timeDilation, 1.0);
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    expect(extensionChangedEvents.length, 2);
    extensionChangedEvent = extensionChangedEvents.last;
    expect(extensionChangedEvent['extension'], 'ext.flutter.timeDilation');
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    expect(extensionChangedEvent['value'], 1.0.toString());
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    result = await binding.testExtension('timeDilation', <String, String>{});
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    expect(result, <String, String>{'timeDilation': 1.0.toString()});
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    expect(timeDilation, 1.0);
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    expect(extensionChangedEvents.length, 2);
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    expect(binding.frameScheduled, isFalse);
  });

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  test('Service extensions - brightnessOverride', () async {
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    Map<String, dynamic> result;
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    result = await binding.testExtension('brightnessOverride', <String, String>{});
    final String brightnessValue = result['value'] as String;

    expect(brightnessValue, 'Brightness.light');
  });
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  test('Service extensions - activeDevToolsServerAddress', () async {
    Map<String, dynamic> result;
    result = await binding.testExtension('activeDevToolsServerAddress', <String, String>{});
    String serverAddress = result['value'] as String;
    expect(serverAddress, '');
    result = await binding.testExtension('activeDevToolsServerAddress', <String, String>{'value': 'http://127.0.0.1:9101'});
    serverAddress = result['value'] as String;
    expect(serverAddress, 'http://127.0.0.1:9101');
    result = await binding.testExtension('activeDevToolsServerAddress', <String, String>{'value': 'http://127.0.0.1:9102'});
    serverAddress = result['value'] as String;
    expect(serverAddress, 'http://127.0.0.1:9102');
  });
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  test('Service extensions - connectedVmServiceUri', () async {
    Map<String, dynamic> result;
    result = await binding.testExtension('connectedVmServiceUri', <String, String>{});
    String serverAddress = result['value'] as String;
    expect(serverAddress, '');
    result = await binding.testExtension('connectedVmServiceUri', <String, String>{'value': 'http://127.0.0.1:54669/kMUMseKAnog=/'});
    serverAddress = result['value'] as String;
    expect(serverAddress, 'http://127.0.0.1:54669/kMUMseKAnog=/');
    result = await binding.testExtension('connectedVmServiceUri', <String, String>{'value': 'http://127.0.0.1:54000/kMUMseKAnog=/'});
    serverAddress = result['value'] as String;
    expect(serverAddress, 'http://127.0.0.1:54000/kMUMseKAnog=/');
  });
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}