def test_prefix_operations():
m = PREFIXES['m']
k = PREFIXES['k']
M = PREFIXES['M']
dodeca = Prefix('dodeca', 'dd', 1, base=12)
assert m * k == 1
assert k * k == M
assert 1 / m == k
assert k / m == M
assert dodeca * dodeca == 144
assert 1 / dodeca == 1 / 12
assert k / dodeca == 1000 / 12
assert dodeca / dodeca == 1
m = Quantity("meter", 1, 6)
assert dodeca / m == 12 / m
expr1 = kilo*3
assert isinstance(expr1, Mul)
assert (expr1).args == (3, kilo)
expr2 = kilo*x
assert isinstance(expr2, Mul)
assert (expr2).args == (x, kilo)
def test_prefix_operations():
m = PREFIXES['m']
k = PREFIXES['k']
M = PREFIXES['M']
dodeca = Prefix('dodeca', 'dd', 1, base=12)
assert m * k == 1
assert k * k == M
assert 1 / m == k
assert k / m == M
assert dodeca * dodeca == 144
assert 1 / dodeca == 1 / 12
assert k / dodeca == 1000 / 12
assert dodeca / dodeca == 1
m = Quantity("meter", 1, 6)
assert dodeca / m == 12 / m
def test_prefix_operations():
m = PREFIXES["m"]
k = PREFIXES["k"]
M = PREFIXES["M"]
dodeca = Prefix("dodeca", "dd", 1, base=12)
assert m * k == 1
assert k * k == M
assert 1 / m == k
assert k / m == M
assert dodeca * dodeca == 144
assert 1 / dodeca == S.One / 12
assert k / dodeca == S(1000) / 12
assert dodeca / dodeca == 1
m = Quantity("fake_meter")
SI.set_quantity_dimension(m, S.One)
SI.set_quantity_scale_factor(m, S.One)
assert dodeca * m == 12 * m
assert dodeca / m == 12 / m
expr1 = kilo * 3
assert isinstance(expr1, Mul)
assert expr1.args == (3, kilo)
expr2 = kilo * x
assert isinstance(expr2, Mul)
assert expr2.args == (x, kilo)
expr3 = kilo / 3
assert isinstance(expr3, Mul)
assert expr3.args == (Rational(1, 3), kilo)
assert expr3.args == (S.One / 3, kilo)
expr4 = kilo / x
assert isinstance(expr4, Mul)
assert expr4.args == (1 / x, kilo)
def test_prefix_operations():
m = PREFIXES['m']
k = PREFIXES['k']
M = PREFIXES['M']
dodeca = Prefix('dodeca', 'dd', 1, base=12)
assert m * k == 1
assert k * k == M
assert 1 / m == k
assert k / m == M
assert dodeca * dodeca == 144
assert 1 / dodeca == S.One / 12
assert k / dodeca == S(1000) / 12
assert dodeca / dodeca == 1
m = Quantity("fake_meter")
m.set_dimension(S.One)
m.set_scale_factor(S.One)
assert dodeca * m == 12 * m
assert dodeca / m == 12 / m
expr1 = kilo * 3
assert isinstance(expr1, Mul)
assert (expr1).args == (3, kilo)
expr2 = kilo * x
assert isinstance(expr2, Mul)
assert (expr2).args == (x, kilo)
expr3 = kilo / 3
assert isinstance(expr3, Mul)
assert (expr3).args == (Rational(1, 3), kilo)
assert (expr3).args == (S.One / 3, kilo)
expr4 = kilo / x
assert isinstance(expr4, Mul)
assert (expr4).args == (1 / x, kilo)