import unittest
import gc
gc.set_threshold(5)

class TestGC(unittest.TestCase):

    def test_zip(self):
        container = []
        iterator = zip([container]*2, [container]*3)
        container.append(iterator)
        next(iterator)
        del container, iterator

    def test_combinations(self):
        pass

    def test_combinations_with_replacement(self):
        pass

    def test_compress(self):
        pass

    def test_count(self):
        pass

    def test_cycle(self):
        pass

    def test_issue2246(self):
        pass

    def test_filterfalse(self):
        pass

    def test_zip_longest(self):
        pass

    def test_map(self):
        pass

    def test_permutations(self):
        pass