def test_moleculesperm3(self): """ Test the creation of an concentration quantity with units of molecules/m^3. """ q = quantity.Concentration(1.0, "molecules/m^3") self.assertAlmostEqual(q.value, 1.0, 6) self.assertAlmostEqual(q.value_si * constants.Na, 1.0, delta=1e-6) self.assertEqual(q.units, "molecules/m^3")
def test_perm3(self): """ Test the creation of an concentration quantity with units of m^-3. """ try: q = quantity.Concentration(1.0, "m^-3") self.fail('Allowed invalid unit type "m^-3".') except quantity.QuantityError: pass