Method test_deferred_refcount_frozen

Lib/test/test_gc.py:1176–1200

(self)

        gc.unfreeze()

    def test_deferred_refcount_frozen(self):
        # Also from GH-126312: objects that use deferred reference counting
        # weren't ignored if they were frozen. Unfortunately, it's pretty
        # difficult to come up with a case that triggers this.
        #
        # Calling gc.collect() while the garbage collector is frozen doesn't
        # trigger this normally, but it *does* if it's inside unittest for whatever
        # reason. We can't call unittest from inside a test, so it has to be
        # in a subprocess.
        source = textwrap.dedent("""
        import gc
        import unittest


        class Test(unittest.TestCase):
            def test_something(self):
                gc.freeze()
                gc.collect()
                gc.unfreeze()


        if __name__ == "__main__":
            unittest.main()
        """)
        assert_python_ok("-c", source)

    def test_do_not_cleanup_type_subclasses_before_finalization(self):
        #  See https://github.com/python/cpython/issues/135552