def METHOD_NAME(self):
    """Basic operation of the Record Parser."""
    for index in range(len(self.handles)):
        handle = self.handles[index]
        rec = GenePop.read(handle)
        self.assertTrue(
            str(rec).startswith(
                "Generated by createGenePop.py - (C) Tiago Antao\n"
                "136255903\n"
                "136257048\n"
                "136257636\n"
                "Pop\n"
            ),
            f"Did not expect this:\n{rec}",
        )
        self.assertIsInstance(rec, GenePop.Record)
        self.assertEqual(len(rec.loci_list), self.num_loci[index])
        self.assertEqual(rec.marker_len, self.marker_len[index])
        self.assertEqual(len(rec.populations), self.pops_indivs[index][0])
        self.assertEqual(rec.pop_list, self.pop_names)
        for i in range(self.pops_indivs[index][0]):
            self.assertEqual(len(rec.populations[i]), self.pops_indivs[index][1][i])