implicit-casts:false in flutter_driver (#45175)

* implicit-casts:false in flutter_driver

* address review comments

packages/flutter_driver/analysis_options.yaml

+# Override the parent analysis_options until all the repo has implicit-casts: false
+
+include: ../analysis_options.yaml
+
+analyzer:
+  strong-mode:
+    implicit-casts: false
+    implicit-dynamic: false

packages/flutter_driver/lib/src/common/diagnostics_tree.dart

@@ -33,7 +33,7 @@ class GetDiagnosticsTree extends CommandWithTarget {
        super(finder, timeout: timeout);
 
   /// Deserializes this command from the value generated by [serialize].
-  GetDiagnosticsTree.deserialize(Map<String, dynamic> json)
+  GetDiagnosticsTree.deserialize(Map<String, String> json)
       : subtreeDepth = int.parse(json['subtreeDepth']),
         includeProperties = json['includeProperties'] == 'true',
         diagnosticsType = _diagnosticsTypeIndex.lookupBySimpleName(json['diagnosticsType']),

packages/flutter_driver/lib/src/common/find.dart

@@ -185,14 +185,14 @@ class BySemanticsLabel extends SerializableFinder {
   @override
   Map<String, String> serialize() {
     if (label is RegExp) {
-      final RegExp regExp = label;
+      final RegExp regExp = label as RegExp;
       return super.serialize()..addAll(<String, String>{
         'label': regExp.pattern,
         'isRegExp': 'true',
       });
     } else {
       return super.serialize()..addAll(<String, String>{
-        'label': label,
+        'label': label as String,
       });
     }
   }
@@ -351,9 +351,9 @@ class Descendant extends SerializableFinder {
   /// Deserializes the finder from JSON generated by [serialize].
   static Descendant deserialize(Map<String, String> json) {
     final Map<String, String> jsonOfMatcher =
-        Map<String, String>.from(jsonDecode(json['of']));
+        Map<String, String>.from(jsonDecode(json['of']) as Map<String, dynamic>);
     final Map<String, String> jsonMatchingMatcher =
-        Map<String, String>.from(jsonDecode(json['matching']));
+        Map<String, String>.from(jsonDecode(json['matching']) as Map<String, dynamic>);
     return Descendant(
       of: SerializableFinder.deserialize(jsonOfMatcher),
       matching: SerializableFinder.deserialize(jsonMatchingMatcher),
@@ -406,9 +406,9 @@ class Ancestor extends SerializableFinder {
   /// Deserializes the finder from JSON generated by [serialize].
   static Ancestor deserialize(Map<String, String> json) {
     final Map<String, String> jsonOfMatcher =
-        Map<String, String>.from(jsonDecode(json['of']));
+        Map<String, String>.from(jsonDecode(json['of']) as Map<String, dynamic>);
     final Map<String, String> jsonMatchingMatcher =
-        Map<String, String>.from(jsonDecode(json['matching']));
+        Map<String, String>.from(jsonDecode(json['matching']) as Map<String, dynamic>);
     return Ancestor(
       of: SerializableFinder.deserialize(jsonOfMatcher),
       matching: SerializableFinder.deserialize(jsonMatchingMatcher),
@@ -454,7 +454,7 @@ class GetSemanticsIdResult extends Result {
 
   /// Deserializes this result from JSON.
   static GetSemanticsIdResult fromJson(Map<String, dynamic> json) {
-    return GetSemanticsIdResult(json['id']);
+    return GetSemanticsIdResult(json['id'] as int);
   }
 
   @override

packages/flutter_driver/lib/src/common/fuchsia_compat.dart

@@ -58,7 +58,7 @@ class _DummySshCommandRunner implements SshCommandRunner {
       // will wait indefinitely for the `out` directory to be serviced, causing
       // a deadlock.
       final ProcessResult r = await Process.run(exe, args);
-      return r.stdout.split('\n');
+      return (r.stdout as String).split('\n');
     } on ProcessException catch (e) {
       _log("Error running '$command': $e");
     }

packages/flutter_driver/lib/src/common/geometry.dart

@@ -36,7 +36,7 @@ class GetOffset extends CommandWithTarget {
   GetOffset(SerializableFinder finder,  this.offsetType, { Duration timeout }) : super(finder, timeout: timeout);
 
   /// Deserializes this command from the value generated by [serialize].
-  GetOffset.deserialize(Map<String, dynamic> json)
+  GetOffset.deserialize(Map<String, String> json)
       : offsetType = _offsetTypeIndex.lookupBySimpleName(json['offsetType']),
         super.deserialize(json);
 
@@ -75,8 +75,8 @@ class GetOffsetResult extends Result {
   /// Deserializes the result from JSON.
   static GetOffsetResult fromJson(Map<String, dynamic> json) {
     return GetOffsetResult(
-      dx: json['dx'],
-      dy: json['dy'],
+      dx: json['dx'] as double,
+      dy: json['dy'] as double,
     );
   }
 

packages/flutter_driver/lib/src/common/health.dart

@@ -46,7 +46,7 @@ class Health extends Result {
 
   /// Deserializes the result from JSON.
   static Health fromJson(Map<String, dynamic> json) {
-    return Health(_healthStatusIndex.lookupBySimpleName(json['status']));
+    return Health(_healthStatusIndex.lookupBySimpleName(json['status'] as String));
   }
 
   @override

packages/flutter_driver/lib/src/common/render_tree.dart

@@ -27,7 +27,7 @@ class RenderTree extends Result {
 
   /// Deserializes the result from JSON.
   static RenderTree fromJson(Map<String, dynamic> json) {
-    return RenderTree(json['tree']);
+    return RenderTree(json['tree'] as String);
   }
 
   @override

packages/flutter_driver/lib/src/common/request_data.dart

@@ -40,7 +40,7 @@ class RequestDataResult extends Result {
 
   /// Deserializes the result from JSON.
   static RequestDataResult fromJson(Map<String, dynamic> json) {
-    return RequestDataResult(json['message']);
+    return RequestDataResult(json['message'] as String);
   }
 
   @override

packages/flutter_driver/lib/src/common/semantics.dart

@@ -37,7 +37,7 @@ class SetSemanticsResult extends Result {
 
   /// Deserializes this result from JSON.
   static SetSemanticsResult fromJson(Map<String, dynamic> json) {
-    return SetSemanticsResult(json['changedState']);
+    return SetSemanticsResult(json['changedState'] as bool);
   }
 
   @override

packages/flutter_driver/lib/src/common/text.dart

@@ -11,7 +11,7 @@ class GetText extends CommandWithTarget {
   GetText(SerializableFinder finder, { Duration timeout }) : super(finder, timeout: timeout);
 
   /// Deserializes this command from the value generated by [serialize].
-  GetText.deserialize(Map<String, dynamic> json) : super.deserialize(json);
+  GetText.deserialize(Map<String, String> json) : super.deserialize(json);
 
   @override
   String get kind => 'get_text';
@@ -27,7 +27,7 @@ class GetTextResult extends Result {
 
   /// Deserializes the result from JSON.
   static GetTextResult fromJson(Map<String, dynamic> json) {
-    return GetTextResult(json['text']);
+    return GetTextResult(json['text'] as String);
   }
 
   @override
@@ -42,7 +42,7 @@ class EnterText extends Command {
   const EnterText(this.text, { Duration timeout }) : super(timeout: timeout);
 
   /// Deserializes this command from the value generated by [serialize].
-  EnterText.deserialize(Map<String, dynamic> json)
+  EnterText.deserialize(Map<String, String> json)
     : text = json['text'],
       super.deserialize(json);
 
@@ -78,7 +78,7 @@ class SetTextEntryEmulation extends Command {
   const SetTextEntryEmulation(this.enabled, { Duration timeout }) : super(timeout: timeout);
 
   /// Deserializes this command from the value generated by [serialize].
-  SetTextEntryEmulation.deserialize(Map<String, dynamic> json)
+  SetTextEntryEmulation.deserialize(Map<String, String> json)
     : enabled = json['enabled'] == 'true',
       super.deserialize(json);
 

packages/flutter_driver/lib/src/common/wait.dart

@@ -159,7 +159,7 @@ class NoTransientCallbacks extends SerializableWaitCondition {
   /// given JSON map.
   ///
   /// The [json] argument must not be null.
-  factory NoTransientCallbacks.deserialize(Map<String, dynamic> json) {
+  factory NoTransientCallbacks.deserialize(Map<String, String> json) {
     assert(json != null);
     if (json['conditionName'] != 'NoTransientCallbacksCondition')
       throw SerializationException('Error occurred during deserializing the NoTransientCallbacksCondition JSON string: $json');
@@ -179,7 +179,7 @@ class NoPendingFrame extends SerializableWaitCondition {
   /// JSON map.
   ///
   /// The [json] argument must not be null.
-  factory NoPendingFrame.deserialize(Map<String, dynamic> json) {
+  factory NoPendingFrame.deserialize(Map<String, String> json) {
     assert(json != null);
     if (json['conditionName'] != 'NoPendingFrameCondition')
       throw SerializationException('Error occurred during deserializing the NoPendingFrameCondition JSON string: $json');
@@ -199,7 +199,7 @@ class FirstFrameRasterized extends SerializableWaitCondition {
   /// given JSON map.
   ///
   /// The [json] argument must not be null.
-  factory FirstFrameRasterized.deserialize(Map<String, dynamic> json) {
+  factory FirstFrameRasterized.deserialize(Map<String, String> json) {
     assert(json != null);
     if (json['conditionName'] != 'FirstFrameRasterizedCondition')
       throw SerializationException('Error occurred during deserializing the FirstFrameRasterizedCondition JSON string: $json');
@@ -219,7 +219,7 @@ class NoPendingPlatformMessages extends SerializableWaitCondition {
   /// given JSON map.
   ///
   /// The [json] argument must not be null.
-  factory NoPendingPlatformMessages.deserialize(Map<String, dynamic> json) {
+  factory NoPendingPlatformMessages.deserialize(Map<String, String> json) {
     assert(json != null);
     if (json['conditionName'] != 'NoPendingPlatformMessagesCondition')
       throw SerializationException('Error occurred during deserializing the NoPendingPlatformMessagesCondition JSON string: $json');
@@ -242,7 +242,7 @@ class CombinedCondition extends SerializableWaitCondition {
   /// given JSON map.
   ///
   /// The [jsonMap] argument must not be null.
-  factory CombinedCondition.deserialize(Map<String, dynamic> jsonMap) {
+  factory CombinedCondition.deserialize(Map<String, String> jsonMap) {
     assert(jsonMap != null);
     if (jsonMap['conditionName'] != 'CombinedCondition')
       throw SerializationException('Error occurred during deserializing the CombinedCondition JSON string: $jsonMap');
@@ -252,7 +252,7 @@ class CombinedCondition extends SerializableWaitCondition {
 
     final List<SerializableWaitCondition> conditions = <SerializableWaitCondition>[];
     for (Map<String, dynamic> condition in json.decode(jsonMap['conditions'])) {
-      conditions.add(_deserialize(condition));
+      conditions.add(_deserialize(condition.cast<String, String>()));
     }
     return CombinedCondition(conditions);
   }
@@ -279,7 +279,7 @@ class CombinedCondition extends SerializableWaitCondition {
 /// Parses a [SerializableWaitCondition] or its subclass from the given [json] map.
 ///
 /// The [json] argument must not be null.
-SerializableWaitCondition _deserialize(Map<String, dynamic> json) {
+SerializableWaitCondition _deserialize(Map<String, String> json) {
   assert(json != null);
   final String conditionName = json['conditionName'];
   switch (conditionName) {

packages/flutter_driver/lib/src/driver/driver.dart

@@ -436,7 +436,7 @@ class FlutterDriver {
       final Future<Map<String, dynamic>> future = appIsolate.invokeExtension(
         _flutterExtensionMethodName,
         serialized,
-      ).then<Map<String, dynamic>>((Object value) => value);
+      ).then<Map<String, dynamic>>((Object value) => value as Map<String, dynamic>);
       response = await _warnIfSlow<Map<String, dynamic>>(
         future: future,
         timeout: command.timeout ?? kUnusuallyLongTimeout,
@@ -450,9 +450,9 @@ class FlutterDriver {
         stackTrace,
       );
     }
-    if (response['isError'])
+    if (response['isError'] as bool)
       throw DriverError('Error in Flutter application: ${response['response']}');
-    return response['response'];
+    return response['response'] as Map<String, dynamic>;
   }
 
   void _logCommunication(String message) {
@@ -850,8 +850,8 @@ class FlutterDriver {
     //       and a source of flakes.
     await Future<void>.delayed(const Duration(seconds: 2));
 
-    final Map<String, dynamic> result = await _peer.sendRequest('_flutter.screenshot');
-    return base64.decode(result['screenshot']);
+    final Map<String, dynamic> result = await _peer.sendRequest('_flutter.screenshot') as Map<String, dynamic>;
+    return base64.decode(result['screenshot'] as String);
   }
 
   /// Returns the Flags set in the Dart VM as JSON.
@@ -875,9 +875,9 @@ class FlutterDriver {
   /// [getFlagList]: https://github.com/dart-lang/sdk/blob/master/runtime/vm/service/service.md#getflaglist
   Future<List<Map<String, dynamic>>> getVmFlags() async {
     await _restorePeerConnectionIfNeeded();
-    final Map<String, dynamic> result = await _peer.sendRequest('getFlagList');
+    final Map<String, dynamic> result = await _peer.sendRequest('getFlagList') as Map<String, dynamic>;
     return result != null
-        ? result['flags'].cast<Map<String,dynamic>>()
+        ? (result['flags'] as List<dynamic>).cast<Map<String,dynamic>>()
         : const <Map<String, dynamic>>[];
   }
 
@@ -924,7 +924,7 @@ class FlutterDriver {
         timeout: timeout,
         message: 'VM is taking an unusually long time to respond to being told to stop tracing...',
       );
-      return Timeline.fromJson(await _peer.sendRequest(_getVMTimelineMethodName));
+      return Timeline.fromJson(await _peer.sendRequest(_getVMTimelineMethodName) as Map<String, dynamic>);
     } catch (error, stackTrace) {
       throw DriverError(
         'Failed to stop tracing due to remote error',
@@ -1239,10 +1239,9 @@ class DriverOffset {
 
   @override
   bool operator ==(dynamic other) {
-    if (other is! DriverOffset)
-      return false;
-    final DriverOffset typedOther = other;
-    return dx == typedOther.dx && dy == typedOther.dy;
+    return other is DriverOffset
+        && other.dx == dx
+        && other.dy == dy;
   }
 
   @override

packages/flutter_driver/lib/src/driver/timeline.dart

@@ -29,20 +29,20 @@ class TimelineEvent {
   factory TimelineEvent(Map<String, dynamic> json) {
     return TimelineEvent._(
       json,
-      json['name'],
-      json['cat'],
-      json['ph'],
-      json['pid'],
-      json['tid'],
+      json['name'] as String,
+      json['cat'] as String,
+      json['ph'] as String,
+      json['pid'] as int,
+      json['tid'] as int,
       json['dur'] != null
-        ? Duration(microseconds: json['dur'])
+        ? Duration(microseconds: json['dur'] as int)
         : null,
       json['tdur'] != null
-        ? Duration(microseconds: json['tdur'])
+        ? Duration(microseconds: json['tdur'] as int)
         : null,
-      json['ts'],
-      json['tts'],
-      json['args'],
+      json['ts'] as int,
+      json['tts'] as int,
+      json['args'] as Map<String, dynamic>,
     );
   }
 
@@ -122,7 +122,7 @@ class TimelineEvent {
 }
 
 List<TimelineEvent> _parseEvents(Map<String, dynamic> json) {
-  final List<dynamic> jsonEvents = json['traceEvents'];
+  final List<dynamic> jsonEvents = json['traceEvents'] as List<dynamic>;
 
   if (jsonEvents == null)
     return null;

packages/flutter_driver/lib/src/extension/extension.dart

@@ -152,14 +152,14 @@ class FlutterDriverExtension {
     });
 
     _finders.addAll(<String, FinderConstructor>{
-      'ByText': (SerializableFinder finder) => _createByTextFinder(finder),
-      'ByTooltipMessage': (SerializableFinder finder) => _createByTooltipMessageFinder(finder),
-      'BySemanticsLabel': (SerializableFinder finder) => _createBySemanticsLabelFinder(finder),
-      'ByValueKey': (SerializableFinder finder) => _createByValueKeyFinder(finder),
-      'ByType': (SerializableFinder finder) => _createByTypeFinder(finder),
+      'ByText': (SerializableFinder finder) => _createByTextFinder(finder as ByText),
+      'ByTooltipMessage': (SerializableFinder finder) => _createByTooltipMessageFinder(finder as ByTooltipMessage),
+      'BySemanticsLabel': (SerializableFinder finder) => _createBySemanticsLabelFinder(finder as BySemanticsLabel),
+      'ByValueKey': (SerializableFinder finder) => _createByValueKeyFinder(finder as ByValueKey),
+      'ByType': (SerializableFinder finder) => _createByTypeFinder(finder as ByType),
       'PageBack': (SerializableFinder finder) => _createPageBackFinder(),
-      'Ancestor': (SerializableFinder finder) => _createAncestorFinder(finder),
-      'Descendant': (SerializableFinder finder) => _createDescendantFinder(finder),
+      'Ancestor': (SerializableFinder finder) => _createAncestorFinder(finder as Ancestor),
+      'Descendant': (SerializableFinder finder) => _createDescendantFinder(finder as Descendant),
     });
   }
 
@@ -314,9 +314,9 @@ class FlutterDriverExtension {
   Finder _createByValueKeyFinder(ByValueKey arguments) {
     switch (arguments.keyValueType) {
       case 'int':
-        return find.byKey(ValueKey<int>(arguments.keyValue));
+        return find.byKey(ValueKey<int>(arguments.keyValue as int));
       case 'String':
-        return find.byKey(ValueKey<String>(arguments.keyValue));
+        return find.byKey(ValueKey<String>(arguments.keyValue as String));
       default:
         throw 'Unsupported ByValueKey type: ${arguments.keyValueType}';
     }
@@ -367,7 +367,7 @@ class FlutterDriverExtension {
   }
 
   Future<TapResult> _tap(Command command) async {
-    final Tap tapCommand = command;
+    final Tap tapCommand = command as Tap;
     final Finder computedFinder = await _waitForElement(
       _createFinder(tapCommand.finder).hitTestable()
     );
@@ -376,20 +376,20 @@ class FlutterDriverExtension {
   }
 
   Future<WaitForResult> _waitFor(Command command) async {
-    final WaitFor waitForCommand = command;
+    final WaitFor waitForCommand = command as WaitFor;
     await _waitForElement(_createFinder(waitForCommand.finder));
     return const WaitForResult();
   }
 
   Future<WaitForAbsentResult> _waitForAbsent(Command command) async {
-    final WaitForAbsent waitForAbsentCommand = command;
+    final WaitForAbsent waitForAbsentCommand = command as WaitForAbsent;
     await _waitForAbsentElement(_createFinder(waitForAbsentCommand.finder));
     return const WaitForAbsentResult();
   }
 
   Future<Result> _waitForCondition(Command command) async {
     assert(command != null);
-    final WaitForCondition waitForConditionCommand = command;
+    final WaitForCondition waitForConditionCommand = command as WaitForCondition;
     final WaitCondition condition = deserializeCondition(waitForConditionCommand.condition);
     await condition.wait();
     return null;
@@ -437,7 +437,7 @@ class FlutterDriverExtension {
   }
 
   Future<GetSemanticsIdResult> _getSemanticsId(Command command) async {
-    final GetSemanticsId semanticsCommand = command;
+    final GetSemanticsId semanticsCommand = command as GetSemanticsId;
     final Finder target = await _waitForElement(_createFinder(semanticsCommand.finder));
     final Iterable<Element> elements = target.evaluate();
     if (elements.length > 1) {
@@ -448,7 +448,7 @@ class FlutterDriverExtension {
     SemanticsNode node;
     while (renderObject != null && node == null) {
       node = renderObject.debugSemantics;
-      renderObject = renderObject.parent;
+      renderObject = renderObject.parent as RenderObject;
     }
     if (node == null)
       throw StateError('No semantics data found');
@@ -456,10 +456,10 @@ class FlutterDriverExtension {
   }
 
   Future<GetOffsetResult> _getOffset(Command command) async {
-    final GetOffset getOffsetCommand = command;
+    final GetOffset getOffsetCommand = command as GetOffset;
     final Finder finder = await _waitForElement(_createFinder(getOffsetCommand.finder));
     final Element element = finder.evaluate().single;
-    final RenderBox box = element.renderObject;
+    final RenderBox box = element.renderObject as RenderBox;
     Offset localPoint;
     switch (getOffsetCommand.offsetType) {
       case OffsetType.topLeft:
@@ -483,7 +483,7 @@ class FlutterDriverExtension {
   }
 
   Future<DiagnosticsTreeResult> _getDiagnosticsTree(Command command) async {
-    final GetDiagnosticsTree diagnosticsCommand = command;
+    final GetDiagnosticsTree diagnosticsCommand = command as GetDiagnosticsTree;
     final Finder finder = await _waitForElement(_createFinder(diagnosticsCommand.finder));
     final Element element = finder.evaluate().single;
     DiagnosticsNode diagnosticsNode;
@@ -502,7 +502,7 @@ class FlutterDriverExtension {
   }
 
   Future<ScrollResult> _scroll(Command command) async {
-    final Scroll scrollCommand = command;
+    final Scroll scrollCommand = command as Scroll;
     final Finder target = await _waitForElement(_createFinder(scrollCommand.finder));
     final int totalMoves = scrollCommand.duration.inMicroseconds * scrollCommand.frequency ~/ Duration.microsecondsPerSecond;
     final Offset delta = Offset(scrollCommand.dx, scrollCommand.dy) / totalMoves.toDouble();
@@ -526,22 +526,22 @@ class FlutterDriverExtension {
   }
 
   Future<ScrollResult> _scrollIntoView(Command command) async {
-    final ScrollIntoView scrollIntoViewCommand = command;
+    final ScrollIntoView scrollIntoViewCommand = command as ScrollIntoView;
     final Finder target = await _waitForElement(_createFinder(scrollIntoViewCommand.finder));
     await Scrollable.ensureVisible(target.evaluate().single, duration: const Duration(milliseconds: 100), alignment: scrollIntoViewCommand.alignment ?? 0.0);
     return const ScrollResult();
   }
 
   Future<GetTextResult> _getText(Command command) async {
-    final GetText getTextCommand = command;
+    final GetText getTextCommand = command as GetText;
     final Finder target = await _waitForElement(_createFinder(getTextCommand.finder));
     // TODO(yjbanov): support more ways to read text
-    final Text text = target.evaluate().single.widget;
+    final Text text = target.evaluate().single.widget as Text;
     return GetTextResult(text.data);
   }
 
   Future<SetTextEntryEmulationResult> _setTextEntryEmulation(Command command) async {
-    final SetTextEntryEmulation setTextEntryEmulationCommand = command;
+    final SetTextEntryEmulation setTextEntryEmulationCommand = command as SetTextEntryEmulation;
     if (setTextEntryEmulationCommand.enabled) {
       _testTextInput.register();
     } else {
@@ -555,18 +555,18 @@ class FlutterDriverExtension {
       throw 'Unable to fulfill `FlutterDriver.enterText`. Text emulation is '
             'disabled. You can enable it using `FlutterDriver.setTextEntryEmulation`.';
     }
-    final EnterText enterTextCommand = command;
+    final EnterText enterTextCommand = command as EnterText;
     _testTextInput.enterText(enterTextCommand.text);
     return const EnterTextResult();
   }
 
   Future<RequestDataResult> _requestData(Command command) async {
-    final RequestData requestDataCommand = command;
+    final RequestData requestDataCommand = command as RequestData;
     return RequestDataResult(_requestDataHandler == null ? 'No requestData Extension registered' : await _requestDataHandler(requestDataCommand.message));
   }
 
   Future<SetFrameSyncResult> _setFrameSync(Command command) async {
-    final SetFrameSync setFrameSyncCommand = command;
+    final SetFrameSync setFrameSyncCommand = command as SetFrameSync;
     _frameSync = setFrameSyncCommand.enabled;
     return const SetFrameSyncResult();
   }
@@ -575,7 +575,7 @@ class FlutterDriverExtension {
   bool get _semanticsIsEnabled => RendererBinding.instance.pipelineOwner.semanticsOwner != null;
 
   Future<SetSemanticsResult> _setSemantics(Command command) async {
-    final SetSemantics setSemanticsCommand = command;
+    final SetSemantics setSemanticsCommand = command as SetSemantics;
     final bool semanticsWasEnabled = _semanticsIsEnabled;
     if (setSemanticsCommand.enabled && _semantics == null) {
       _semantics = RendererBinding.instance.pipelineOwner.ensureSemantics();

packages/flutter_driver/lib/src/extension/wait_conditions.dart

@@ -132,13 +132,13 @@ class _InternalNoPendingPlatformMessagesCondition implements WaitCondition {
 
   @override
   bool get condition {
-    final TestDefaultBinaryMessenger binaryMessenger = ServicesBinding.instance.defaultBinaryMessenger;
+    final TestDefaultBinaryMessenger binaryMessenger = ServicesBinding.instance.defaultBinaryMessenger as TestDefaultBinaryMessenger;
     return binaryMessenger.pendingMessageCount == 0;
   }
 
   @override
   Future<void> wait() async {
-    final TestDefaultBinaryMessenger binaryMessenger = ServicesBinding.instance.defaultBinaryMessenger;
+    final TestDefaultBinaryMessenger binaryMessenger = ServicesBinding.instance.defaultBinaryMessenger as TestDefaultBinaryMessenger;
     while (!condition) {
       await binaryMessenger.platformMessagesFinished;
     }
@@ -163,7 +163,7 @@ class _InternalCombinedCondition implements WaitCondition {
     assert(condition != null);
     if (condition.conditionName != 'CombinedCondition')
       throw SerializationException('Error occurred during deserializing from the given condition: ${condition.serialize()}');
-    final CombinedCondition combinedCondition = condition;
+    final CombinedCondition combinedCondition = condition as CombinedCondition;
     if (combinedCondition.conditions == null) {
       return const _InternalCombinedCondition(<WaitCondition>[]);
     }