postTest method Null safety
Called by the testWidgets function after a test is executed.
Implementation
void postTest() {
assert(inTest);
FlutterError.onError = _oldExceptionHandler;
FlutterError.demangleStackTrace = _oldStackTraceDemangler;
_pendingExceptionDetails = null;
_parentZone = null;
buildOwner!.focusManager.dispose();
ServicesBinding.instance.keyEventManager.keyMessageHandler = null;
buildOwner!.focusManager = FocusManager()..registerGlobalHandlers();
// Disabling the warning because @visibleForTesting doesn't take the testing
// framework itself into account, but we don't want it visible outside of
// tests.
// ignore: invalid_use_of_visible_for_testing_member
RawKeyboard.instance.clearKeysPressed();
// ignore: invalid_use_of_visible_for_testing_member
HardwareKeyboard.instance.clearState();
// ignore: invalid_use_of_visible_for_testing_member
keyEventManager.clearState();
// ignore: invalid_use_of_visible_for_testing_member
RendererBinding.instance.initMouseTracker();
}