def test__mul__and__div__(self):
a = Value.parse('3 [meter / sec]')
b = Value.parse('2 [kg]')
c = Value.parse('6 [kg * meter / sec]')
d = Value.parse('1.5 [meter / (kg * sec)]')
self.assertEqual(c, a*b)
self.assertEqual(d, a/b)
def test__add__and__sub__ok(self):
a = Value.parse('2 [meter / sec]')
b = Value.parse('3 [meter / sec]')
c = Value.parse('5 [meter / sec]')
d = Value.parse('-1 [meter / sec]')
self.assertEqual(c, a+b)
self.assertEqual(d, a-b)
def test__cmp__(self):
a = Value.parse('2 [meter / sec]')
b = Value.parse('2 [meter / sec]')
c = Value.parse('3 [meter / sec]')
self.assertEqual(0, cmp(a, b))
self.assertLess(0, cmp(c, a))
self.assertGreater(0, cmp(a, c))
def test__neg__and__pos__(self):
a = Value.parse('3 [meter / sec]')
b = Value.parse('-3 [meter / sec]')
self.assertIs(a, +a)
self.assertEqual(b, -a)
def test__pow__TypeError_modulus(self):
a = Value.parse('3 [meter / sec]')
self.assertRaises(TypeError, pow, a, 2, 4)
def test__pow__no_modulus_nonint_decimal_power_ok(self):
a = Value.parse('4 [meter / sec]')
b = Value.parse('8.0 [meter^1.5 / sec^1.5]')
self.assertEqual(b, a**D('1.5'))
def test__pow__no_modulus_ok(self):
a = Value.parse('4 [meter / sec]')
b = Value.parse('16 [meter^2 / sec^2]')
self.assertEqual(b, a**2)
def test__add__and__sub__Mismatch(self):
a = Value.parse('2 [meter / sec]')
b = Value.parse('3 [kg]')
self.assertRaises(Units.Mismatch, Value.__add__, a, b)
def test__cmp__TypeError(self):
a = Value.parse('2 [meter / sec]')
self.assertRaises(TypeError, cmp, a, 'banana')
self.assertRaises(TypeError, cmp, a, 42)
self.assertRaises(TypeError, cmp, a, D('42'))
def test__cmp__Mismatch(self):
a = Value.parse('2 [meter / sec]')
b = Value.parse('2 [kg]')
self.assertRaises(Units.Mismatch, cmp, a, b)