def METHOD_NAME(self):
    """
    Test reading IMS10 bulletin format from bytes io object.
    """
    with io.open(self.path_to_ims, "rb") as fh:
        with io.BytesIO(fh.read()) as buf:
            buf.seek(0, 0)
            cat = _read_ims10_bulletin(buf, _no_uuid_hashes=True)
    assert len(cat) == 1
    self._assert_catalog(cat)