test_break.py 文件源码

def testWeakReferences(self):
        # Calling registerResult on a result should not keep it alive
        result = unittest2.TestResult()
        unittest2.registerResult(result)

        ref = weakref.ref(result)
        del result

        # For non-reference counting implementations
        gc.collect();gc.collect()
        self.assertIsNone(ref())