'Verify that when a source is deleted, the submissions that
correspond to them are also deleted.'

def test_delete_source_deletes_submissions(self):

    self._delete_collection_setup()
    journalist.delete_collection(self.source.filesystem_id)
    results = db_session.query(Source).filter((Source.id == self.source.id)).all()
    self.assertEqual(results, [])
