I made a flutter media player plugin https://github.com/befovy/fijkplayer.
And used EventChannel and MethodChannel in it.

EventChannel('befovy.com/fijkplayer/event/$id' )
            .receiveBroadcastStream()
            .listen(_eventListener, onError: _errorListener);

receiveBroadcastStream is used in dart side to listen event post from android / iOS native side.
It works fine when running on device.

When I write unit test case, I noticed setMockMethodCallHandler can be used to mock method response from native side. But I can't find any way to mock event post ?

In Shortly,
I post event to dart size from android / iOS native side using EventChannel.EventSink FlutterEventSink . How to mock this in unit test ?
Thanks.