def test_usbtmccomm_query(mock_usbtmc):
comm = USBTMCCommunicator()
comm._filelike.ask = mock.MagicMock(return_value="answer")
eq_(comm._query("mock"), "answer")
comm._filelike.ask.assert_called_with("mock", num=-1, encoding="utf-8")
comm._query("mock", size=10)
comm._filelike.ask.assert_called_with("mock", num=10, encoding="utf-8")
