def METHOD_NAME(self):
    """Check if size of NO section is equal to expected."""
    fpath = os.path.join(__datadir__,
                         "data/GAMESS/basicGAMESS-US2018/water_cis_dets.out")
    data = cclib.io.ccread(fpath)
    writer = cclib.io.moldenwriter.MOLDEN(data)
    # Check size of NO section.
    size_no_ccdata = 0
    extra = 4
    size_no_ccdata += len(data.nooccnos) *\
                            (len(data.nocoeffs[0]) + extra)
    # Filter blank lines.
    nosyms, noenergies, nooccs, nocoeffs = writer._syms_energies_occs_coeffs_from_ccdata_for_moldenwriter()
    size_no_writer = len(list(filter(None, writer._mo_from_ccdata(nosyms, noenergies, nooccs, nocoeffs))))
    assert size_no_writer == size_no_ccdata