def test_product_copy():
p = Product("P", (Range(4), "x"), (Range(4), "y"))
p2 = p.copy()
p2.set("x", Range(2))
q = Product("Q", (p, "p1"), (p, "p2"))
q2 = q.copy()
q2.set_generator("p2", p2.generator)
q2.set_iterator("p1", p2.iterator)
v_r4 = list(range(4))
v_r2 = list(range(2))
v_p = list(itertools.product(v_r4, v_r4))
v_p2 = list(itertools.product(v_r2, v_r4))
v_q2_generator = set(itertools.product(v_p, v_p2))
v_q2_iterator = set(itertools.product(v_p2, v_p))
c = Qit()
for v in c.run(q2.generate().take(200).collect()):
assert v in v_q2_generator
result = c.run(q2.iterate().collect())
assert len(v_q2_iterator) == len(result)
assert v_q2_iterator == set(result)
