def test_outputs(self):
        results = self.col.validate(self.ser)

        # There should be 6 errors, 2 for each row
        self.assertEqual(len(results), 2 * len(self.ser), 'A Column produces the wrong number of errors')
        for i in range(2):
            in_row = [r for r in results if r.row == i]
            self.assertEqual(len(in_row), 2, 'A Column does not report both errors for every row')