def test_Gens_preprocess():
assert not Gens.preprocess((None, ))
assert Gens.preprocess((x, y, z)) == (x, y, z)
a = Symbol('a', commutative=False)
pytest.raises(GeneratorsError, lambda: Gens.preprocess((x, x, y)))
pytest.raises(GeneratorsError, lambda: Gens.preprocess((x, y, a)))
def test_Gens_preprocess():
assert Gens.preprocess((None,)) == ()
assert Gens.preprocess((x, y, z)) == (x, y, z)
assert Gens.preprocess(((x, y, z),)) == (x, y, z)
a = Symbol('a', commutative=False)
pytest.raises(GeneratorsError, lambda: Gens.preprocess((x, x, y)))
pytest.raises(GeneratorsError, lambda: Gens.preprocess((x, y, a)))
def test_Gens_postprocess():
opt = {'gens': (x, y)}
Gens.postprocess(opt)
assert opt == {'gens': (x, y)}
def test_Gens_postprocess():
opt = {'gens': (x, y)}
Gens.postprocess(opt)
assert opt == {'gens': (x, y)}