if out := Contains(test.elems, test.elem); test.out != out {
				t.Errorf("Contains(%v, %s) want: %t, got: %t", test.elems, test.elem, test.out, out)
			}
		})
	}
}

type ModifyAt sql.NullTime

// Value return a Unix time.
func (n ModifyAt) Value() (driver.Value, error) {
	if !n.Valid {
		return nil, nil
	}
	return n.Time.Unix(), nil
}

func TestAssertEqual(t *testing.T) {