def test_coordsyscartesian_equivalence():
    A = CoordSysCartesian('A')
    A1 = CoordSysCartesian('A')
    assert (A1 == A)
    B = CoordSysCartesian('B')
    assert (A != B)
def test_coordsyscartesian_equivalence():
    A = CoordSysCartesian('A')
    A1 = CoordSysCartesian('A')
    assert (A1 == A)
    B = CoordSysCartesian('B')
    assert (A != B)