def test_pause(self):
     """Test pause method"""
     src = Preview(port=3001)
     src.pipeline = MockPipeline()
     src.pause()
 def test_end(self):
     """Test end method"""
     src = Preview(port=3001)
     src.pipeline = MockPipeline()
     src.end()
 def test_run(self):
     """Test play method"""
     src = Preview(port=3001)
     src.pipeline = MockPipeline()
     src.run()