// Copyright 2014 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.

import 'dart:ui' hide window;

import 'package:flutter/foundation.dart';

/// Test version of [AccessibilityFeatures] in which specific features may
/// be set to arbitrary values.
///
/// By default, all features are disabled. For an instance where all the
/// features are enabled, consider the [FakeAccessibilityFeatures.allOn]
/// constant.
@immutable
// ignore: avoid_implementing_value_types
class FakeAccessibilityFeatures implements AccessibilityFeatures {
  /// Creates a test instance of [AccessibilityFeatures].
  ///
  /// By default, all features are disabled.
  const FakeAccessibilityFeatures({
    this.accessibleNavigation = false,
    this.invertColors = false,
    this.disableAnimations = false,
    this.boldText = false,
    this.reduceMotion = false,
    this.highContrast = false,
  });

  /// An instance of [AccessibilityFeatures] where all the features are enabled.
  static const FakeAccessibilityFeatures allOn = FakeAccessibilityFeatures(
    accessibleNavigation: true,
    invertColors: true,
    disableAnimations: true,
    boldText: true,
    reduceMotion: true,
    highContrast: true,
  );

  @override
  final bool accessibleNavigation;

  @override
  final bool invertColors;

  @override
  final bool disableAnimations;

  @override
  final bool boldText;

  @override
  final bool reduceMotion;

  @override
  final bool highContrast;

  @override
  bool operator ==(Object other) {
    if (other.runtimeType != runtimeType) {
      return false;
    }
    return other is FakeAccessibilityFeatures
        && other.accessibleNavigation == accessibleNavigation
        && other.invertColors == invertColors
        && other.disableAnimations == disableAnimations
        && other.boldText == boldText
        && other.reduceMotion == reduceMotion
        && other.highContrast == highContrast;
  }

  @override
  int get hashCode => Object.hash(accessibleNavigation, invertColors, disableAnimations, boldText, reduceMotion, highContrast);

  /// This gives us some grace time when the dart:ui side adds something to
  /// [AccessibilityFeatures], and makes things easier when we do rolls to
  /// give us time to catch up.
  ///
  /// If you would like to add to this class, changes must first be made in the
  /// engine, followed by the framework.
  @override
  dynamic noSuchMethod(Invocation invocation) {
    return null;
  }
}

/// Used to fake insets and padding for [TestFlutterView]s.
///
/// See also:
///
///   * [TestFlutterView.padding], [TestFlutterView.systemGestureInsets],
///     [TestFlutterView.viewInsets], and [TestFlutterView.viewPadding] for test
///     properties that make use of [FakeViewPadding].
@immutable
class FakeViewPadding implements ViewPadding {
  /// Instantiates a new [FakeViewPadding] object for faking insets and padding
  /// during tests.
  const FakeViewPadding({
    this.left = 0.0,
    this.top = 0.0,
    this.right = 0.0,
    this.bottom = 0.0,
  });

  FakeViewPadding._wrap(ViewPadding base) :
    left = base.left,
    top = base.top,
    right = base.right,
    bottom = base.bottom;

  @override
  final double left;

  @override
  final double top;

  @override
  final double right;

  @override
  final double bottom;
}

/// [PlatformDispatcher] that wraps another [PlatformDispatcher] and
/// allows faking of some properties for testing purposes.
///
/// See also:
///
///   * [TestFlutterView], which wraps a [FlutterView] for testing and
///     mocking purposes.
///   * [TestWindow], which wraps a [SingletonFlutterWindow] for
///     testing and mocking purposes.
class TestPlatformDispatcher implements PlatformDispatcher {
  /// Constructs a [TestPlatformDispatcher] that defers all behavior to the given
  /// [PlatformDispatcher] unless explicitly overridden for test purposes.
  TestPlatformDispatcher({
    required PlatformDispatcher platformDispatcher,
  }) : _platformDispatcher = platformDispatcher {
    _updateViews();
    _platformDispatcher.onMetricsChanged = _handleMetricsChanged;
  }

  /// The [PlatformDispatcher] that is wrapped by this [TestPlatformDispatcher].
  final PlatformDispatcher _platformDispatcher;

  @override
  TestFlutterView? get implicitView {
    return _platformDispatcher.implicitView != null
      ? _testViews[_platformDispatcher.implicitView!.viewId]!
      : null;
  }

  final Map<Object, TestFlutterView> _testViews = <Object, TestFlutterView>{};

  @override
  VoidCallback? get onMetricsChanged => _platformDispatcher.onMetricsChanged;
  VoidCallback? _onMetricsChanged;
  @override
  set onMetricsChanged(VoidCallback? callback) {
    _onMetricsChanged = callback;
  }

  void _handleMetricsChanged() {
    _updateViews();
    _onMetricsChanged?.call();
  }

  @override
  Locale get locale => _localeTestValue ?? _platformDispatcher.locale;
  Locale? _localeTestValue;
  /// Hides the real locale and reports the given [localeTestValue] instead.
  set localeTestValue(Locale localeTestValue) { // ignore: avoid_setters_without_getters
    _localeTestValue = localeTestValue;
    onLocaleChanged?.call();
  }

  /// Deletes any existing test locale and returns to using the real locale.
  void clearLocaleTestValue() {
    _localeTestValue = null;
    onLocaleChanged?.call();
  }

  @override
  List<Locale> get locales => _localesTestValue ?? _platformDispatcher.locales;
  List<Locale>? _localesTestValue;
  /// Hides the real locales and reports the given [localesTestValue] instead.
  set localesTestValue(List<Locale> localesTestValue) { // ignore: avoid_setters_without_getters
    _localesTestValue = localesTestValue;
    onLocaleChanged?.call();
  }

  /// Deletes any existing test locales and returns to using the real locales.
  void clearLocalesTestValue() {
    _localesTestValue = null;
    onLocaleChanged?.call();
  }

  @override
  VoidCallback? get onLocaleChanged => _platformDispatcher.onLocaleChanged;
  @override
  set onLocaleChanged(VoidCallback? callback) {
    _platformDispatcher.onLocaleChanged = callback;
  }

  @override
  String get initialLifecycleState => _initialLifecycleStateTestValue;
  String _initialLifecycleStateTestValue = '';
  /// Sets a faked initialLifecycleState for testing.
  set initialLifecycleStateTestValue(String state) { // ignore: avoid_setters_without_getters
    _initialLifecycleStateTestValue = state;
  }

  /// Resets [initialLifecycleState] to the default value for the platform.
  void resetInitialLifecycleState() {
    _initialLifecycleStateTestValue = '';
  }

  @override
  double get textScaleFactor => _textScaleFactorTestValue ?? _platformDispatcher.textScaleFactor;
  double? _textScaleFactorTestValue;
  /// Hides the real text scale factor and reports the given
  /// [textScaleFactorTestValue] instead.
  set textScaleFactorTestValue(double textScaleFactorTestValue) { // ignore: avoid_setters_without_getters
    _textScaleFactorTestValue = textScaleFactorTestValue;
    onTextScaleFactorChanged?.call();
  }

  /// Deletes any existing test text scale factor and returns to using the real
  /// text scale factor.
  void clearTextScaleFactorTestValue() {
    _textScaleFactorTestValue = null;
    onTextScaleFactorChanged?.call();
  }

  @override
  Brightness get platformBrightness => _platformBrightnessTestValue ?? _platformDispatcher.platformBrightness;
  Brightness? _platformBrightnessTestValue;
  @override
  VoidCallback? get onPlatformBrightnessChanged => _platformDispatcher.onPlatformBrightnessChanged;
  @override
  set onPlatformBrightnessChanged(VoidCallback? callback) {
    _platformDispatcher.onPlatformBrightnessChanged = callback;
  }
  /// Hides the real text scale factor and reports the given
  /// [platformBrightnessTestValue] instead.
  set platformBrightnessTestValue(Brightness platformBrightnessTestValue) { // ignore: avoid_setters_without_getters
    _platformBrightnessTestValue = platformBrightnessTestValue;
    onPlatformBrightnessChanged?.call();
  }

  /// Deletes any existing test platform brightness and returns to using the
  /// real platform brightness.
  void clearPlatformBrightnessTestValue() {
    _platformBrightnessTestValue = null;
    onPlatformBrightnessChanged?.call();
  }

  @override
  bool get alwaysUse24HourFormat => _alwaysUse24HourFormatTestValue ?? _platformDispatcher.alwaysUse24HourFormat;
  bool? _alwaysUse24HourFormatTestValue;
  /// Hides the real clock format and reports the given
  /// [alwaysUse24HourFormatTestValue] instead.
  set alwaysUse24HourFormatTestValue(bool alwaysUse24HourFormatTestValue) { // ignore: avoid_setters_without_getters
    _alwaysUse24HourFormatTestValue = alwaysUse24HourFormatTestValue;
  }

  /// Deletes any existing test clock format and returns to using the real clock
  /// format.
  void clearAlwaysUse24HourTestValue() {
    _alwaysUse24HourFormatTestValue = null;
  }

  @override
  VoidCallback? get onTextScaleFactorChanged => _platformDispatcher.onTextScaleFactorChanged;
  @override
  set onTextScaleFactorChanged(VoidCallback? callback) {
    _platformDispatcher.onTextScaleFactorChanged = callback;
  }

  @override
  bool get nativeSpellCheckServiceDefined => _nativeSpellCheckServiceDefinedTestValue ?? _platformDispatcher.nativeSpellCheckServiceDefined;
  bool? _nativeSpellCheckServiceDefinedTestValue;
  set nativeSpellCheckServiceDefinedTestValue(bool nativeSpellCheckServiceDefinedTestValue) { // ignore: avoid_setters_without_getters
    _nativeSpellCheckServiceDefinedTestValue = nativeSpellCheckServiceDefinedTestValue;
  }

  /// Deletes existing value that determines whether or not a native spell check
  /// service is defined and returns to the real value.
  void clearNativeSpellCheckServiceDefined() {
    _nativeSpellCheckServiceDefinedTestValue = null;
  }

  @override
  bool get brieflyShowPassword => _brieflyShowPasswordTestValue ?? _platformDispatcher.brieflyShowPassword;
  bool? _brieflyShowPasswordTestValue;
  /// Hides the real [brieflyShowPassword] and reports the given
  /// `brieflyShowPasswordTestValue` instead.
  set brieflyShowPasswordTestValue(bool brieflyShowPasswordTestValue) { // ignore: avoid_setters_without_getters
    _brieflyShowPasswordTestValue = brieflyShowPasswordTestValue;
  }

  /// Resets [brieflyShowPassword] to the default value for the platform.
  void resetBrieflyShowPassword() {
    _brieflyShowPasswordTestValue = null;
  }

  @override
  FrameCallback? get onBeginFrame => _platformDispatcher.onBeginFrame;
  @override
  set onBeginFrame(FrameCallback? callback) {
    _platformDispatcher.onBeginFrame = callback;
  }

  @override
  VoidCallback? get onDrawFrame => _platformDispatcher.onDrawFrame;
  @override
  set onDrawFrame(VoidCallback? callback) {
    _platformDispatcher.onDrawFrame = callback;
  }

  @override
  TimingsCallback? get onReportTimings => _platformDispatcher.onReportTimings;
  @override
  set onReportTimings(TimingsCallback? callback) {
    _platformDispatcher.onReportTimings = callback;
  }

  @override
  PointerDataPacketCallback? get onPointerDataPacket => _platformDispatcher.onPointerDataPacket;
  @override
  set onPointerDataPacket(PointerDataPacketCallback? callback) {
    _platformDispatcher.onPointerDataPacket = callback;
  }

  @override
  String get defaultRouteName => _defaultRouteNameTestValue ?? _platformDispatcher.defaultRouteName;
  String? _defaultRouteNameTestValue;
  /// Hides the real default route name and reports the given
  /// [defaultRouteNameTestValue] instead.
  set defaultRouteNameTestValue(String defaultRouteNameTestValue) { // ignore: avoid_setters_without_getters
    _defaultRouteNameTestValue = defaultRouteNameTestValue;
  }

  /// Deletes any existing test default route name and returns to using the real
  /// default route name.
  void clearDefaultRouteNameTestValue() {
    _defaultRouteNameTestValue = null;
  }

  @override
  void scheduleFrame() {
    _platformDispatcher.scheduleFrame();
  }

  @override
  bool get semanticsEnabled => _semanticsEnabledTestValue ?? _platformDispatcher.semanticsEnabled;
  bool? _semanticsEnabledTestValue;
  /// Hides the real semantics enabled and reports the given
  /// [semanticsEnabledTestValue] instead.
  set semanticsEnabledTestValue(bool semanticsEnabledTestValue) { // ignore: avoid_setters_without_getters
    _semanticsEnabledTestValue = semanticsEnabledTestValue;
    onSemanticsEnabledChanged?.call();
  }

  /// Deletes any existing test semantics enabled and returns to using the real
  /// semantics enabled.
  void clearSemanticsEnabledTestValue() {
    _semanticsEnabledTestValue = null;
    onSemanticsEnabledChanged?.call();
  }

  @override
  VoidCallback? get onSemanticsEnabledChanged => _platformDispatcher.onSemanticsEnabledChanged;
  @override
  set onSemanticsEnabledChanged(VoidCallback? callback) {
    _platformDispatcher.onSemanticsEnabledChanged = callback;
  }

  @override
  SemanticsActionCallback? get onSemanticsAction => _platformDispatcher.onSemanticsAction;
  @override
  set onSemanticsAction(SemanticsActionCallback? callback) {
    _platformDispatcher.onSemanticsAction = callback;
  }

  @override
  AccessibilityFeatures get accessibilityFeatures => _accessibilityFeaturesTestValue ?? _platformDispatcher.accessibilityFeatures;
  AccessibilityFeatures? _accessibilityFeaturesTestValue;
  /// Hides the real accessibility features and reports the given
  /// [accessibilityFeaturesTestValue] instead.
  ///
  /// Consider using [FakeAccessibilityFeatures] to provide specific
  /// values for the various accessibility features under test.
  set accessibilityFeaturesTestValue(AccessibilityFeatures accessibilityFeaturesTestValue) { // ignore: avoid_setters_without_getters
    _accessibilityFeaturesTestValue = accessibilityFeaturesTestValue;
    onAccessibilityFeaturesChanged?.call();
  }

  /// Deletes any existing test accessibility features and returns to using the
  /// real accessibility features.
  void clearAccessibilityFeaturesTestValue() {
    _accessibilityFeaturesTestValue = null;
    onAccessibilityFeaturesChanged?.call();
  }

  @override
  VoidCallback? get onAccessibilityFeaturesChanged => _platformDispatcher.onAccessibilityFeaturesChanged;
  @override
  set onAccessibilityFeaturesChanged(VoidCallback? callback) {
    _platformDispatcher.onAccessibilityFeaturesChanged = callback;
  }

  @override
  void setIsolateDebugName(String name) {
    _platformDispatcher.setIsolateDebugName(name);
  }

  @override
  void sendPlatformMessage(
      String name,
      ByteData? data,
      PlatformMessageResponseCallback? callback,
      ) {
    _platformDispatcher.sendPlatformMessage(name, data, callback);
  }

  @Deprecated(
    'Instead of calling this callback, use ServicesBinding.instance.channelBuffers.push. '
    'This feature was deprecated after v2.1.0-10.0.pre.'
  )
  @override
  PlatformMessageCallback? get onPlatformMessage => _platformDispatcher.onPlatformMessage;
  @Deprecated(
    'Instead of setting this callback, use ServicesBinding.instance.defaultBinaryMessenger.setMessageHandler. '
    'This feature was deprecated after v2.1.0-10.0.pre.'
  )
  @override
  set onPlatformMessage(PlatformMessageCallback? callback) {
    _platformDispatcher.onPlatformMessage = callback;
  }

  /// Delete any test value properties that have been set on this [TestPlatformDispatcher]
  /// and return to reporting the real [PlatformDispatcher] values for all
  /// [PlatformDispatcher] properties.
  ///
  /// If desired, clearing of properties can be done on an individual basis,
  /// e.g., [clearLocaleTestValue].
  void clearAllTestValues() {
    clearAccessibilityFeaturesTestValue();
    clearAlwaysUse24HourTestValue();
    clearDefaultRouteNameTestValue();
    clearPlatformBrightnessTestValue();
    clearLocaleTestValue();
    clearLocalesTestValue();
    clearSemanticsEnabledTestValue();
    clearTextScaleFactorTestValue();
    clearNativeSpellCheckServiceDefined();
    resetBrieflyShowPassword();
    resetInitialLifecycleState();
  }

  @override
  VoidCallback? get onFrameDataChanged => _platformDispatcher.onFrameDataChanged;
  @override
  set onFrameDataChanged(VoidCallback? value) {
    _platformDispatcher.onFrameDataChanged = value;
  }

  @override
  KeyDataCallback? get onKeyData => _platformDispatcher.onKeyData;

  @override
  set onKeyData(KeyDataCallback? onKeyData) {
    _platformDispatcher.onKeyData = onKeyData;
  }

  @override
  VoidCallback? get onPlatformConfigurationChanged => _platformDispatcher.onPlatformConfigurationChanged;

  @override
  set onPlatformConfigurationChanged(VoidCallback? onPlatformConfigurationChanged) {
    _platformDispatcher.onPlatformConfigurationChanged = onPlatformConfigurationChanged;
  }

  @override
  Locale? computePlatformResolvedLocale(List<Locale> supportedLocales) => _platformDispatcher.computePlatformResolvedLocale(supportedLocales);

  @override
  ByteData? getPersistentIsolateData() => _platformDispatcher.getPersistentIsolateData();

  @override
  Iterable<TestFlutterView> get views => _testViews.values;

  void _updateViews() {
    final List<Object> extraKeys = <Object>[..._testViews.keys];
    for (final FlutterView view in _platformDispatcher.views) {
      extraKeys.remove(view.viewId);
      if (!_testViews.containsKey(view.viewId)) {
        _testViews[view.viewId] = TestFlutterView(view: view, platformDispatcher: this);
      }
    }

    extraKeys.forEach(_testViews.remove);
  }

  /// This gives us some grace time when the dart:ui side adds something to
  /// [PlatformDispatcher], and makes things easier when we do rolls to give
  /// us time to catch up.
  @override
  dynamic noSuchMethod(Invocation invocation) {
    return null;
  }
}

/// A [FlutterView] that wraps another [FlutterView] and allows faking of
/// some properties for testing purposes.
///
/// This class should not be instantiated manually, as
/// it requires a backing [FlutterView] that must be produced from
/// a [PlatformDispatcher].
///
/// See also:
///
///   * [WidgetTester.view] which allows for accessing the [TestFlutterView]
///     for single view applications or widget testing.
///   * [WidgetTester.viewOf] which allows for accessing the appropriate
///     [TestFlutterView] in a given situation for multi-view applications.
///   * [TestPlatformDispatcher], which allows for faking of platform specific
///     functionality.
class TestFlutterView implements FlutterView {
  /// Constructs a [TestFlutterView] that defers all behavior to the given
  /// [FlutterView] unless explicitly overridden for testing.
  TestFlutterView({
    required FlutterView view,
    required TestPlatformDispatcher platformDispatcher,
  }) : _view = view, _platformDispatcher = platformDispatcher;

  /// The [FlutterView] backing this [TestFlutterView].
  final FlutterView _view;

  @override
  TestPlatformDispatcher get platformDispatcher => _platformDispatcher;
  final TestPlatformDispatcher _platformDispatcher;

  @override
  Object get viewId => _view.viewId;

  /// The device pixel ratio to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.devicePixelRatio]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FlutterView.devicePixelRatio] for the standard implementation
  ///   * [resetDevicePixelRatio] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  double get devicePixelRatio => _devicePixelRatio ?? _view.devicePixelRatio;
  double? _devicePixelRatio;
  set devicePixelRatio(double value) {
    _devicePixelRatio = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [devicePixelRatio] for this test view to the default value for this view.
  void resetDevicePixelRatio() {
    _devicePixelRatio = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The display features to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.displayFeatures]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FlutterView.displayFeatures] for the standard implementation
  ///   * [resetDisplayFeatures] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  List<DisplayFeature> get displayFeatures => _displayFeatures ?? _view.displayFeatures;
  List<DisplayFeature>? _displayFeatures;
  set displayFeatures(List<DisplayFeature> value) {
    _displayFeatures = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [displayFeatures] to the default values for this view.
  void resetDisplayFeatures() {
    _displayFeatures = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The padding to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.padding]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FakeViewPadding] which is used to set this value for testing
  ///   * [FlutterView.padding] for the standard implementation.
  ///   * [resetPadding] to reset this value specifically.
  ///   * [reset] to reset all test values for this view.
  @override
  FakeViewPadding get padding => _padding ?? FakeViewPadding._wrap(_view.padding);
  FakeViewPadding? _padding;
  set padding(FakeViewPadding value) {
    _padding = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [padding] to the default value for this view.
  void resetPadding() {
    _padding = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The physical geometry to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.physicalGeometry]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// This property and [physicalSize] are dependent on one another. If both
  /// properties are set through their test setters, the final result will be
  /// that [physicalGeometry] determines the location and [physicalSize]
  /// determines the size of the [physicalGeometry] [Rect]. If only
  /// [physicalSize] is set, the final result is that the default value of
  /// [physicalGeometry] determines the location and [physicalSize] determines
  /// the size of the [physicalGeometry] [Rect]. If only [physicalGeometry]
  /// is set, it will determine both the location and size of the
  /// [physicalGeometry] [Rect].
  ///
  /// See also:
  ///
  ///   * [FlutterView.physicalGeometry] for the standard implementation
  ///   * [resetPhysicalGeometry] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  Rect get physicalGeometry {
    Rect value = _physicalGeometry ?? _view.physicalGeometry;
    if (_physicalSize != null) {
      value = value.topLeft & _physicalSize!;
    }
    return value;
  }
  Rect? _physicalGeometry;
  set physicalGeometry(Rect value) {
    _physicalGeometry = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [physicalGeometry] to the default value for this view.
  ///
  /// This will also reset [physicalSize] as the values are dependent
  /// on one another.
  void resetPhysicalGeometry() {
    _physicalGeometry = null;
    _physicalSize = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The physical size to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.physicalSize]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// This property and [physicalGeometry] are dependent on one another. If both
  /// properties are set through their test setters, the final result will be
  /// that [physicalGeometry] determines the location and [physicalSize]
  /// determines the size of the [physicalGeometry] [Rect]. If only
  /// [physicalSize] is set, the final result is that the default value of
  /// [physicalGeometry] determines the location and [physicalSize] determines
  /// the size of the [physicalGeometry] [Rect]. If only [physicalGeometry]
  /// is set, it will determine both the location and size of the
  /// [physicalGeometry] [Rect].
  ///
  /// See also:
  ///
  ///   * [FlutterView.physicalSize] for the standard implementation
  ///   * [resetPhysicalSize] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  Size get physicalSize {
    // This has to be able to default to `_view.physicalSize` as web_ui handles
    // `physicalSize` and `physicalGeometry` differently than dart:ui, where
    // the values are both based off of `physicalGeometry`.
    return _physicalSize ?? _physicalGeometry?.size ?? _view.physicalSize;
  }
  Size? _physicalSize;
  set physicalSize(Size value) {
    _physicalSize = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [physicalSize] to the default value for this view.
  ///
  /// This will also reset [physicalGeometry] as the values are dependent
  /// on one another.
  void resetPhysicalSize() {
    resetPhysicalGeometry();
  }

  /// The system gesture insets to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.systemGestureInsets].
  /// This can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FakeViewPadding] which is used to set this value for testing
  ///   * [FlutterView.systemGestureInsets] for the standard implementation
  ///   * [resetSystemGestureInsets] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  FakeViewPadding get systemGestureInsets => _systemGestureInsets ?? FakeViewPadding._wrap(_view.systemGestureInsets);
  FakeViewPadding? _systemGestureInsets;
  set systemGestureInsets(FakeViewPadding value) {
    _systemGestureInsets = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [systemGestureInsets] to the default value for this view.
  void resetSystemGestureInsets() {
    _systemGestureInsets = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The view insets to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.viewInsets]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FakeViewPadding] which is used to set this value for testing
  ///   * [FlutterView.viewInsets] for the standard implementation
  ///   * [resetViewInsets] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  FakeViewPadding get viewInsets => _viewInsets ?? FakeViewPadding._wrap(_view.viewInsets);
  FakeViewPadding? _viewInsets;
  set viewInsets(FakeViewPadding value) {
    _viewInsets = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [viewInsets] to the default value for this view.
  void resetViewInsets() {
    _viewInsets = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The view padding to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.viewPadding]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FakeViewPadding] which is used to set this value for testing
  ///   * [FlutterView.viewPadding] for the standard implementation
  ///   * [resetViewPadding] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  FakeViewPadding get viewPadding => _viewPadding ?? FakeViewPadding._wrap(_view.viewPadding);
  FakeViewPadding? _viewPadding;
  set viewPadding(FakeViewPadding value) {
    _viewPadding = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [viewPadding] to the default value for this view.
  void resetViewPadding() {
    _viewPadding = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// The gesture settings to use for this test.
  ///
  /// Defaults to the value provided by [FlutterView.gestureSettings]. This
  /// can only be set in a test environment to emulate different view
  /// configurations. A standard [FlutterView] is not mutable from the framework.
  ///
  /// See also:
  ///
  ///   * [FlutterView.gestureSettings] for the standard implementation
  ///   * [resetGestureSettings] to reset this value specifically
  ///   * [reset] to reset all test values for this view
  @override
  GestureSettings get gestureSettings => _gestureSettings ?? _view.gestureSettings;
  GestureSettings? _gestureSettings;
  set gestureSettings(GestureSettings value) {
    _gestureSettings = value;
    platformDispatcher.onMetricsChanged?.call();
  }

  /// Resets [gestureSettings] to the default value for this view.
  void resetGestureSettings() {
    _gestureSettings = null;
    platformDispatcher.onMetricsChanged?.call();
  }

  @override
  void render(Scene scene) {
    _view.render(scene);
  }

  @override
  void updateSemantics(SemanticsUpdate update) {
    _view.updateSemantics(update);
  }

  /// Resets all test values to the defaults for this view.
  ///
  /// See also:
  ///
  ///   * [resetDevicePixelRatio] to reset [devicePixelRatio] specifically
  ///   * [resetDisplayFeatures]  to reset [displayFeatures] specifically
  ///   * [resetPadding] to reset [padding] specifically
  ///   * [resetPhysicalGeometry] to reset [physicalGeometry] specifically
  ///   * [resetPhysicalSize] to reset [physicalSize] specifically
  ///   * [resetSystemGestureInsets] to reset [systemGestureInsets] specifically
  ///   * [resetViewInsets] to reset [viewInsets] specifically
  ///   * [resetViewPadding] to reset [viewPadding] specifically
  ///   * [resetGestureSettings] to reset [gestureSettings] specifically
  void reset() {
    resetDevicePixelRatio();
    resetDisplayFeatures();
    resetPadding();
    resetPhysicalGeometry();
    // Skipping resetPhysicalSize because resetPhysicalGeometry resets both values.
    resetSystemGestureInsets();
    resetViewInsets();
    resetViewPadding();
    resetGestureSettings();
  }

  /// This gives us some grace time when the dart:ui side adds something to
  /// [FlutterView], and makes things easier when we do rolls to give
  /// us time to catch up.
  @override
  dynamic noSuchMethod(Invocation invocation) {
    return null;
  }
}

/// [SingletonFlutterWindow] that wraps another [SingletonFlutterWindow] and
/// allows faking of some properties for testing purposes.
///
/// Tests for certain widgets, e.g., [MaterialApp], might require faking certain
/// properties of a [SingletonFlutterWindow]. [TestWindow] facilitates the
/// faking of these properties by overriding the properties of a real
/// [SingletonFlutterWindow] with desired fake values. The binding used within
/// tests, [TestWidgetsFlutterBinding], contains a [TestWindow] that is used by
/// all tests.
///
/// ## Sample Code
///
/// A test can utilize a [TestWindow] in the following way:
///
/// ```dart
/// testWidgets('your test name here', (WidgetTester tester) async {
///   // Retrieve the TestWidgetsFlutterBinding.
///   final TestWidgetsFlutterBinding testBinding = tester.binding;
///
///   // Fake the desired properties of the TestWindow. All code running
///   // within this test will perceive the following fake text scale
///   // factor as the real text scale factor of the window.
///   testBinding.window.textScaleFactorFakeValue = 2.5;
///
///   // Test code that depends on text scale factor here.
/// });
/// ```
///
/// The [TestWidgetsFlutterBinding] is recreated for each test and
/// therefore any fake values defined in one test will not persist
/// to the next.
///
/// If a test needs to override a real [SingletonFlutterWindow] property and
/// then later return to using the real [SingletonFlutterWindow] property,
/// [TestWindow] provides methods to clear each individual test value, e.g.,
/// [clearLocaleTestValue()].
///
/// To clear all fake test values in a [TestWindow], consider using
/// [clearAllTestValues()].
///
/// See also:
///
///   * [TestPlatformDispatcher], which wraps a [PlatformDispatcher] for
///     testing purposes and is used by the [platformDispatcher] property of
///     this class.
class TestWindow implements SingletonFlutterWindow {
  /// Constructs a [TestWindow] that defers all behavior to the given
  /// [SingletonFlutterWindow] unless explicitly overridden for test purposes.
  TestWindow({
    required SingletonFlutterWindow window,
  }) : platformDispatcher = TestPlatformDispatcher(platformDispatcher: window.platformDispatcher);

  /// Constructs a [TestWindow] that defers all behavior to the given
  /// [TestPlatformDispatcher] and its [TestPlatformDispatcher.implicitView].
  ///
  /// This class will not work when multiple views are present. If multiple view
  /// support is needed use [WidgetTester.platformDispatcher] and
  /// [WidgetTester.viewOf].
  ///
  /// See also:
  ///
  ///   * [TestPlatformDispatcher] which allows faking of platform-wide values for
  ///     testing purposes.
  ///   * [TestFlutterView] which allows faking of view-specific values for
  ///     testing purposes.
  TestWindow.fromPlatformDispatcher({
    required this.platformDispatcher,
  });

  @override
  final TestPlatformDispatcher platformDispatcher;

  TestFlutterView get _view => platformDispatcher.implicitView!;

  @override
  double get devicePixelRatio => _view.devicePixelRatio;
  /// Hides the real device pixel ratio and reports the given [devicePixelRatio]
  /// instead.
  // ignore: avoid_setters_without_getters
  set devicePixelRatioTestValue(double devicePixelRatio) {
    _view.devicePixelRatio = devicePixelRatio;
  }

  /// Deletes any existing test device pixel ratio and returns to using the real
  /// device pixel ratio.
  void clearDevicePixelRatioTestValue() {
    _view.resetDevicePixelRatio();
  }

  @override
  Size get physicalSize => _view.physicalSize;
  /// Hides the real physical size and reports the given [physicalSizeTestValue]
  /// instead.
  // ignore: avoid_setters_without_getters
  set physicalSizeTestValue (Size physicalSizeTestValue) {
    _view.physicalSize = physicalSizeTestValue;
  }

  /// Deletes any existing test physical size and returns to using the real
  /// physical size.
  void clearPhysicalSizeTestValue() {
    _view.resetPhysicalSize();
  }

  @override
  ViewPadding get viewInsets => _view.viewInsets;
  /// Hides the real view insets and reports the given [viewInsetsTestValue]
  /// instead.
  ///
  /// Use [FakeViewPadding] to set this value for testing.
  // ignore: avoid_setters_without_getters
  set viewInsetsTestValue(ViewPadding value) {
    _view.viewInsets = value is FakeViewPadding ? value : FakeViewPadding._wrap(value);
  }

  /// Deletes any existing test view insets and returns to using the real view
  /// insets.
  void clearViewInsetsTestValue() {
    _view.resetViewInsets();
  }

  @override
  ViewPadding get viewPadding => _view.viewPadding;
  /// Hides the real view padding and reports the given [paddingTestValue]
  /// instead.
  ///
  /// Use [FakeViewPadding] to set this value for testing.
  // ignore: avoid_setters_without_getters
  set viewPaddingTestValue(ViewPadding value) {
    _view.viewPadding = value is FakeViewPadding ? value : FakeViewPadding._wrap(value);
  }

  /// Deletes any existing test view padding and returns to using the real
  /// viewPadding.
  void clearViewPaddingTestValue() {
    _view.resetViewPadding();
  }

  @override
  ViewPadding get padding => _view.padding;
  /// Hides the real padding and reports the given [paddingTestValue] instead.
  ///
  /// Use [FakeViewPadding] to set this value for testing.
  // ignore: avoid_setters_without_getters
  set paddingTestValue(ViewPadding value) {
    _view.padding = value is FakeViewPadding ? value : FakeViewPadding._wrap(value);
  }

  /// Deletes any existing test padding and returns to using the real padding.
  void clearPaddingTestValue() {
    _view.resetPadding();
  }

  @override
  GestureSettings get gestureSettings => _view.gestureSettings;
  /// Hides the real gesture settings and reports the given [gestureSettingsTestValue] instead.
  // ignore: avoid_setters_without_getters
  set gestureSettingsTestValue(GestureSettings gestureSettingsTestValue) {
    _view.gestureSettings = gestureSettingsTestValue;
  }

  /// Deletes any existing test gesture settings and returns to using the real gesture settings.
  void clearGestureSettingsTestValue() {
    _view.resetGestureSettings();
  }

  @override
  List<DisplayFeature> get displayFeatures => _view.displayFeatures;
  /// Hides the real displayFeatures and reports the given [displayFeaturesTestValue] instead.
  // ignore: avoid_setters_without_getters
  set displayFeaturesTestValue(List<DisplayFeature> displayFeaturesTestValue) {
    _view.displayFeatures = displayFeaturesTestValue;
  }

  /// Deletes any existing test padding and returns to using the real padding.
  void clearDisplayFeaturesTestValue() {
    _view.resetDisplayFeatures();
  }

  @override
  ViewPadding get systemGestureInsets => _view.systemGestureInsets;
  /// Hides the real system gesture insets and reports the given
  /// [systemGestureInsetsTestValue] instead.
  ///
  /// Use [FakeViewPadding] to set this value for testing.
  set systemGestureInsetsTestValue(ViewPadding value) { // ignore: avoid_setters_without_getters
    _view.systemGestureInsets = value is FakeViewPadding ? value : FakeViewPadding._wrap(value);
  }

  /// Deletes any existing test system gesture insets and returns to using the real system gesture insets.
  void clearSystemGestureInsetsTestValue() {
    _view.resetSystemGestureInsets();
  }

  @override
  VoidCallback? get onMetricsChanged => platformDispatcher.onMetricsChanged;
  @override
  set onMetricsChanged(VoidCallback? callback) {
    platformDispatcher.onMetricsChanged = callback;
  }

  @override
  Locale get locale => platformDispatcher.locale;
  /// Hides the real locale and reports the given [localeTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.localeTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set localeTestValue(Locale localeTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.localeTestValue = localeTestValue;
  }
  @Deprecated(
    'Use platformDispatcher.clearLocaleTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  /// Deletes any existing test locale and returns to using the real locale.
  void clearLocaleTestValue() {
    platformDispatcher.clearLocaleTestValue();
  }

  @override
  List<Locale> get locales => platformDispatcher.locales;
  /// Hides the real locales and reports the given [localesTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.localesTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set localesTestValue(List<Locale> localesTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.localesTestValue = localesTestValue;
  }
  /// Deletes any existing test locales and returns to using the real locales.
  @Deprecated(
    'Use platformDispatcher.clearLocalesTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearLocalesTestValue() {
    platformDispatcher.clearLocalesTestValue();
  }

  @override
  VoidCallback? get onLocaleChanged => platformDispatcher.onLocaleChanged;
  @override
  set onLocaleChanged(VoidCallback? callback) {
    platformDispatcher.onLocaleChanged = callback;
  }

  @override
  String get initialLifecycleState => platformDispatcher.initialLifecycleState;
  /// Sets a faked initialLifecycleState for testing.
  @Deprecated(
    'Use platformDispatcher.initialLifecycleStateTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set initialLifecycleStateTestValue(String state) { // ignore: avoid_setters_without_getters
    platformDispatcher.initialLifecycleStateTestValue = state;
  }

  @override
  double get textScaleFactor => platformDispatcher.textScaleFactor;
  /// Hides the real text scale factor and reports the given
  /// [textScaleFactorTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.textScaleFactorTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set textScaleFactorTestValue(double textScaleFactorTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.textScaleFactorTestValue = textScaleFactorTestValue;
  }
  /// Deletes any existing test text scale factor and returns to using the real
  /// text scale factor.
  @Deprecated(
    'Use platformDispatcher.clearTextScaleFactorTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearTextScaleFactorTestValue() {
    platformDispatcher.clearTextScaleFactorTestValue();
  }

  @override
  Brightness get platformBrightness => platformDispatcher.platformBrightness;
  @override
  VoidCallback? get onPlatformBrightnessChanged => platformDispatcher.onPlatformBrightnessChanged;
  @override
  set onPlatformBrightnessChanged(VoidCallback? callback) {
    platformDispatcher.onPlatformBrightnessChanged = callback;
  }
  /// Hides the real text scale factor and reports the given
  /// [platformBrightnessTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.platformBrightnessTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set platformBrightnessTestValue(Brightness platformBrightnessTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.platformBrightnessTestValue = platformBrightnessTestValue;
  }
  /// Deletes any existing test platform brightness and returns to using the
  /// real platform brightness.
  @Deprecated(
    'Use platformDispatcher.clearPlatformBrightnessTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearPlatformBrightnessTestValue() {
    platformDispatcher.clearPlatformBrightnessTestValue();
  }

  @override
  bool get alwaysUse24HourFormat => platformDispatcher.alwaysUse24HourFormat;
  /// Hides the real clock format and reports the given
  /// [alwaysUse24HourFormatTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.alwaysUse24HourFormatTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set alwaysUse24HourFormatTestValue(bool alwaysUse24HourFormatTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.alwaysUse24HourFormatTestValue = alwaysUse24HourFormatTestValue;
  }
  /// Deletes any existing test clock format and returns to using the real clock
  /// format.
  @Deprecated(
    'Use platformDispatcher.clearAlwaysUse24HourTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearAlwaysUse24HourTestValue() {
    platformDispatcher.clearAlwaysUse24HourTestValue();
  }

  @override
  VoidCallback? get onTextScaleFactorChanged => platformDispatcher.onTextScaleFactorChanged;
  @override
  set onTextScaleFactorChanged(VoidCallback? callback) {
    platformDispatcher.onTextScaleFactorChanged = callback;
  }

  @override
  bool get nativeSpellCheckServiceDefined => platformDispatcher.nativeSpellCheckServiceDefined;
  set nativeSpellCheckServiceDefinedTestValue(bool nativeSpellCheckServiceDefinedTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.nativeSpellCheckServiceDefinedTestValue = nativeSpellCheckServiceDefinedTestValue;
  }

  @override
  bool get brieflyShowPassword => platformDispatcher.brieflyShowPassword;
  /// Hides the real [brieflyShowPassword] and reports the given
  /// `brieflyShowPasswordTestValue` instead.
  @Deprecated(
    'Use platformDispatcher.brieflyShowPasswordTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set brieflyShowPasswordTestValue(bool brieflyShowPasswordTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.brieflyShowPasswordTestValue = brieflyShowPasswordTestValue;
  }

  @override
  FrameCallback? get onBeginFrame => platformDispatcher.onBeginFrame;
  @override
  set onBeginFrame(FrameCallback? callback) {
    platformDispatcher.onBeginFrame = callback;
  }

  @override
  VoidCallback? get onDrawFrame => platformDispatcher.onDrawFrame;
  @override
  set onDrawFrame(VoidCallback? callback) {
    platformDispatcher.onDrawFrame = callback;
  }

  @override
  TimingsCallback? get onReportTimings => platformDispatcher.onReportTimings;
  @override
  set onReportTimings(TimingsCallback? callback) {
    platformDispatcher.onReportTimings = callback;
  }

  @override
  PointerDataPacketCallback? get onPointerDataPacket => platformDispatcher.onPointerDataPacket;
  @override
  set onPointerDataPacket(PointerDataPacketCallback? callback) {
    platformDispatcher.onPointerDataPacket = callback;
  }

  @override
  String get defaultRouteName => platformDispatcher.defaultRouteName;
  /// Hides the real default route name and reports the given
  /// [defaultRouteNameTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.defaultRouteNameTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set defaultRouteNameTestValue(String defaultRouteNameTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.defaultRouteNameTestValue = defaultRouteNameTestValue;
  }
  /// Deletes any existing test default route name and returns to using the real
  /// default route name.
  @Deprecated(
    'Use platformDispatcher.clearDefaultRouteNameTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearDefaultRouteNameTestValue() {
    platformDispatcher.clearDefaultRouteNameTestValue();
  }

  @override
  void scheduleFrame() {
    platformDispatcher.scheduleFrame();
  }

  @override
  void render(Scene scene) {
    _view.render(scene);
  }

  @override
  bool get semanticsEnabled => platformDispatcher.semanticsEnabled;
  /// Hides the real semantics enabled and reports the given
  /// [semanticsEnabledTestValue] instead.
  @Deprecated(
    'Use platformDispatcher.semanticsEnabledTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set semanticsEnabledTestValue(bool semanticsEnabledTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.semanticsEnabledTestValue = semanticsEnabledTestValue;
  }
  /// Deletes any existing test semantics enabled and returns to using the real
  /// semantics enabled.
  @Deprecated(
    'Use platformDispatcher.clearSemanticsEnabledTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearSemanticsEnabledTestValue() {
    platformDispatcher.clearSemanticsEnabledTestValue();
  }

  @override
  VoidCallback? get onSemanticsEnabledChanged => platformDispatcher.onSemanticsEnabledChanged;
  @override
  set onSemanticsEnabledChanged(VoidCallback? callback) {
    platformDispatcher.onSemanticsEnabledChanged = callback;
  }

  @override
  SemanticsActionCallback? get onSemanticsAction => platformDispatcher.onSemanticsAction;
  @override
  set onSemanticsAction(SemanticsActionCallback? callback) {
    platformDispatcher.onSemanticsAction = callback;
  }

  @override
  AccessibilityFeatures get accessibilityFeatures => platformDispatcher.accessibilityFeatures;
  /// Hides the real accessibility features and reports the given
  /// [accessibilityFeaturesTestValue] instead.
  ///
  /// Consider using [FakeAccessibilityFeatures] to provide specific
  /// values for the various accessibility features under test.
  @Deprecated(
    'Use platformDispatcher.accessibilityFeaturesTestValue instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  set accessibilityFeaturesTestValue(AccessibilityFeatures accessibilityFeaturesTestValue) { // ignore: avoid_setters_without_getters
    platformDispatcher.accessibilityFeaturesTestValue = accessibilityFeaturesTestValue;
  }
  /// Deletes any existing test accessibility features and returns to using the
  /// real accessibility features.
  @Deprecated(
    'Use platformDispatcher.clearAccessibilityFeaturesTestValue() instead. '
    'This feature was deprecated after v2.11.0-0.0.pre.'
  )
  void clearAccessibilityFeaturesTestValue() {
    platformDispatcher.clearAccessibilityFeaturesTestValue();
  }

  @override
  VoidCallback? get onAccessibilityFeaturesChanged => platformDispatcher.onAccessibilityFeaturesChanged;
  @override
  set onAccessibilityFeaturesChanged(VoidCallback? callback) {
    platformDispatcher.onAccessibilityFeaturesChanged = callback;
  }

  @override
  void updateSemantics(SemanticsUpdate update) {
    _view.updateSemantics(update);
  }

  @override
  void setIsolateDebugName(String name) {
    platformDispatcher.setIsolateDebugName(name);
  }

  @override
  void sendPlatformMessage(
    String name,
    ByteData? data,
    PlatformMessageResponseCallback? callback,
  ) {
    platformDispatcher.sendPlatformMessage(name, data, callback);
  }

  @Deprecated(
    'Instead of calling this callback, use ServicesBinding.instance.channelBuffers.push. '
    'This feature was deprecated after v2.1.0-10.0.pre.'
  )
  @override
  PlatformMessageCallback? get onPlatformMessage => platformDispatcher.onPlatformMessage;
  @Deprecated(
    'Instead of setting this callback, use ServicesBinding.instance.defaultBinaryMessenger.setMessageHandler. '
    'This feature was deprecated after v2.1.0-10.0.pre.'
  )
  @override
  set onPlatformMessage(PlatformMessageCallback? callback) {
    platformDispatcher.onPlatformMessage = callback;
  }

  /// Delete any test value properties that have been set on this [TestWindow]
  /// as well as its [platformDispatcher].
  ///
  /// After calling this, the real [SingletonFlutterWindow] and
  /// [PlatformDispatcher] values are reported again.
  ///
  /// If desired, clearing of properties can be done on an individual basis,
  /// e.g., [clearLocaleTestValue].
  void clearAllTestValues() {
    clearDevicePixelRatioTestValue();
    clearPaddingTestValue();
    clearGestureSettingsTestValue();
    clearDisplayFeaturesTestValue();
    clearPhysicalSizeTestValue();
    clearViewInsetsTestValue();
    platformDispatcher.clearAllTestValues();
  }

  /// This gives us some grace time when the dart:ui side adds something to
  /// [SingletonFlutterWindow], and makes things easier when we do rolls to give
  /// us time to catch up.
  @override
  dynamic noSuchMethod(Invocation invocation) {
    return null;
  }
}
