def _read_format(self):
format = self._read_line()
if format != FORMAT_ONE:
raise errors.UnknownContainerFormatError(format)
def _state_expecting_format_line(self):
line = self._consume_line()
if line is not None:
if line != FORMAT_ONE:
raise errors.UnknownContainerFormatError(line)
self._state_handler = self._state_expecting_record_type
def test_unknown_container_format(self):
"""Test the formatting of UnknownContainerFormatError."""
e = errors.UnknownContainerFormatError('bad format string')
self.assertEqual("Unrecognised container format: 'bad format string'",
str(e))