def test_definition():
# want to test if the system can have several units of the same dimension
dm = Unit(m, factor=0.1)
base = (m, s)
base_dim = (m.dim, s.dim)
ms = UnitSystem(base, (c, dm), "MS", "MS system")
assert set(ms._base_units) == set(base)
assert set(ms._units) == set((m, s, c, dm))
#assert ms._units == DimensionSystem._sort_dims(base + (velocity,))
assert ms.name == "MS"
assert ms.descr == "MS system"
assert ms._system._base_dims == DimensionSystem.sort_dims(base_dim)
assert set(ms._system._dims) == set(base_dim + (velocity,))
def test_definition():
base = (length, time)
ms = DimensionSystem(base, (velocity,), "MS", "MS system")
assert ms._base_dims == DimensionSystem.sort_dims(base)
assert set(ms._dims) == set(base + (velocity,))
assert ms.name == "MS"
assert ms.descr == "MS system"
assert ms._can_transf_matrix is None
# be sure that there is no duplicates in ms._dims
dims = (Dimension(length=1), Dimension(length=1, symbol="l"))
ms = DimensionSystem(base, dims)
assert set(ms._dims) == set(base)
def test_sort_dims():
assert (DimensionSystem.sort_dims((length, velocity, time))
== (length, time, velocity))
