test_timedeltas.py 文件源码

def test_to_timedelta_on_nanoseconds(self):
        # GH 9273
        result = Timedelta(nanoseconds=100)
        expected = Timedelta('100ns')
        self.assertEqual(result, expected)

        result = Timedelta(days=1, hours=1, minutes=1, weeks=1, seconds=1,
                           milliseconds=1, microseconds=1, nanoseconds=1)
        expected = Timedelta(694861001001001)
        self.assertEqual(result, expected)

        result = Timedelta(microseconds=1) + Timedelta(nanoseconds=1)
        expected = Timedelta('1us1ns')
        self.assertEqual(result, expected)

        result = Timedelta(microseconds=1) - Timedelta(nanoseconds=1)
        expected = Timedelta('999ns')
        self.assertEqual(result, expected)

        result = Timedelta(microseconds=1) + 5 * Timedelta(nanoseconds=-2)
        expected = Timedelta('990ns')
        self.assertEqual(result, expected)

        self.assertRaises(TypeError, lambda: Timedelta(nanoseconds='abc'))