def METHOD_NAME(self, testdata):
    """
    Tests iterative reading.
    """
    # Read normally.
    filename = testdata['1.su_first_trace']
    st = obspy.read(filename, unpack_trace_headers=True)
    # Read iterative.
    ist = [_i for _i in iread_su(filename, unpack_headers=True)]
    del ist[0].stats.su.data_encoding
    assert st.traces == ist