def METHOD_NAME(self):
    assert self.trex.is_running() == False  
    for i in range(20):
        ret = self.trex.start_trex(**self.valid_start_params)   # start TRex run
        assert ret == True
        assert self.trex.is_running() == False  # we expect the status to be 'Starting'
        ret = self.trex.stop_trex()
        assert ret == True
        assert self.trex.is_running() == False
    pass