def test___rtruediv__():
assert 2 / m == si.Physical(2, si.Dimensions(0, -1, 0, 0, 0, 0, 0), 1)
assert 10 / N == si.Physical(10, si.Dimensions(-1, -1, 2, 0, 0, 0, 0), 1)
assert 1 / kip == si.Physical(
value=0.00022480894309971045,
dimensions=si.Dimensions(kg=-1, m=-1, s=2, A=0, cd=0, K=0, mol=0),
factor=4448.221615260501,
precision=3,
)
def test___truediv__():
assert m / m == 1
assert m / s == si.Physical(1, si.Dimensions(0, 1, -1, 0, 0, 0, 0), 1)
assert kN / m / m == kPa
assert (5 * kN) / 2 == 2.5 * kN
assert (kip / (2 * ft * 5 * ft)).value == pytest.approx(
(0.100 * ksf).value)
def test___sub__():
assert kg - kg == 0.0
assert m - ft == si.Physical(0.6952, si.Dimensions(0, 1, 0, 0, 0, 0, 0), 1)
assert ft - m == si.Physical(-0.6952, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048)
assert N - lb == si.Physical(-3.4482216152605005,
si.Dimensions(1, 1, -2, 0, 0, 0, 0), 1)
assert lb - N == si.Physical(3.4482216152605005,
si.Dimensions(1, 1, -2, 0, 0, 0, 0),
0.22480894309971047)
assert (ft - 3).value == pytest.approx(
si.Physical(-0.6096, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048).value)
with pytest.raises(ValueError):
kg - m
N - psf
def test___mul__():
assert m * m == si.Physical(1, si.Dimensions(0, 2, 0, 0, 0, 0, 0), 1)
assert m * kg == si.Physical(1, si.Dimensions(1, 1, 0, 0, 0, 0, 0), 1)
assert ft * m == si.Physical(0.3048, si.Dimensions(0, 2, 0, 0, 0, 0, 0),
1 / 0.3048)
assert N * m == si.Physical(1, si.Dimensions(1, 2, -2, 0, 0, 0, 0), 1)
assert psf * m * m == si.Physical(47.88025898033584,
si.Dimensions(1, 1, -2, 0, 0, 0, 0),
0.02088543423315013)
assert 2 * ft == si.Physical(0.6096, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048)
assert (si.Physical(10, si.Dimensions(-1, -1, 0, 0, 0, 0, 0), 1) *
si.Physical(2, si.Dimensions(1, 1, 0, 0, 0, 0, 0), 1)) == 20
assert (10 * ksf) * (5 * ft) * (2 *
ft) == 100 * kip # TODO: Fix this gotcha
assert m * ft == si.Physical(0.3048, si.Dimensions(0, 2, 0, 0, 0, 0, 0),
1.0)
def test___add__():
assert kg + kg == si.Physical(2, si.Dimensions(1, 0, 0, 0, 0, 0, 0), 1)
assert m + ft == si.Physical(1.3048, si.Dimensions(0, 1, 0, 0, 0, 0, 0), 1)
assert ft + m == si.Physical(1.3048, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048)
assert N + lb == si.Physical(5.4482216152605005,
si.Dimensions(1, 1, -2, 0, 0, 0, 0), 1)
assert lb + N == si.Physical(5.4482216152605005,
si.Dimensions(1, 1, -2, 0, 0, 0, 0),
0.22480894309971047)
assert ft + 3 == si.Physical(1.2192, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048)
with pytest.raises(ValueError):
kg + m
N + psf
def test___pow__():
assert N**2 == si.Physical(1, si.Dimensions(2, 2, -4, 0, 0, 0, 0), 1)
assert ft**3 == si.Physical(0.3048**3, si.Dimensions(0, 3, 0, 0, 0, 0, 0),
(1 / 0.3048)**3)
def test___rsub__():
assert 2 - ft == si.Physical(0.3048, si.Dimensions(0, 1, 0, 0, 0, 0, 0),
1 / 0.3048)
assert 10 - N == si.Physical(9, si.Dimensions(1, 1, -2, 0, 0, 0, 0), 1)