def METHOD_NAME(self):
    signal = DashboardSignal(
        db_id=1, name="Change", source="chng",
        covidcast_signal="chng-sig",
        latest_coverage_update=date(2021, 1, 1),
        latest_status_update=date(2021, 1, 1))
    data = [['chng', 'chng-sig', 20200101],
            ['chng', 'chng-sig', 20210101],
            ['quidel', 'quidel-sig', 20220101]]
    metadata = pd.DataFrame(data, columns=['data_source', 'signal', 'max_issue'])
    issue_date = get_latest_issue_from_metadata(signal, metadata)
    self.assertEqual(issue_date, date(2021, 1, 1))