def test_loopbackcomm_read_raw_2char_terminator():
mock_stdin = mock.MagicMock()
mock_stdin.read.side_effect = [b"a", b"b", b"c", b"\r", b"\n"]
comm = LoopbackCommunicator(stdin=mock_stdin)
comm._terminator = "\r\n"
assert comm.read_raw() == b"abc"
mock_stdin.read.assert_has_calls([mock.call(1)]*5)
assert mock_stdin.read.call_count == 5
def test_loopbackcomm_read_raw_2char_terminator():
mock_stdin = mock.MagicMock()
mock_stdin.read.side_effect = [b"a", b"b", b"c", b"\r", b"\n"]
comm = LoopbackCommunicator(stdin=mock_stdin)
comm._terminator = "\r\n"
assert comm.read_raw() == b"abc"
mock_stdin.read.assert_has_calls([mock.call(1)]*5)
assert mock_stdin.read.call_count == 5
def test_loopbackcomm_read_raw_terminator_is_empty_string():
mock_stdin = mock.MagicMock()
mock_stdin.read.side_effect = [b"abc"]
comm = LoopbackCommunicator(stdin=mock_stdin)
comm._terminator = ""
assert comm.read_raw() == b"abc"
mock_stdin.read.assert_has_calls([mock.call(-1)])
assert mock_stdin.read.call_count == 1