pywin32_testutil.py 文件源码

def _do_leak_tests(self, result = None):
        try:
            gtrc = sys.gettotalrefcount
        except AttributeError:
            return # can't do leak tests in this build
        # Assume already called once, to prime any caches etc
        gc.collect()
        trc = gtrc()
        for i in range(self.num_leak_iters):
            self.real_test(result)
            if result.shouldStop:
                break
        del i # created after we remembered the refcount!
        # int division here means one or 2 stray references won't force 
        # failure, but one per loop
        gc.collect()
        lost = (gtrc() - trc) // self.num_leak_iters
        if lost < 0:
            msg = "LeakTest: %s appeared to gain %d references!!" % (self.real_test, -lost)
            result.addFailure(self.real_test, (AssertionError, msg, None))
        if lost > 0:
            msg = "LeakTest: %s lost %d references" % (self.real_test, lost)
            exc = AssertionError(msg)
            result.addFailure(self.real_test, (exc.__class__, exc, None))