def test_cm_to_cm(self):
value = spsc_data.LengthValue(3, "cm")
value.convert_to("cm")
self.assertEqual(value.value, 3)
def test_m_to_m(self):
value = spsc_data.LengthValue(5, "m")
value.convert_to("m")
self.assertEqual(value.value, 5)
def test_nm_to_cm(self):
value = spsc_data.LengthValue(5, "nm")
value.convert_to("cm")
self.assertEqual(value.value, 5 * 10**-7)