def test_pm(self):
"""
Test the creation of a length quantity with units of pm.
"""
q = quantity.Length(1.0, "pm")
self.assertAlmostEqual(q.value, 1.0, 6)
self.assertAlmostEqual(q.value_si, 1.0e-12, delta=1e-18)
self.assertEqual(q.units, "pm")
def test_km(self):
"""
Test the creation of a length quantity with units of km.
"""
q = quantity.Length(1.0, "km")
self.assertAlmostEqual(q.value, 1.0, 6)
self.assertAlmostEqual(q.value_si, 1.0e3, delta=1e-3)
self.assertEqual(q.units, "km")
