test_threading.py 文件源码

def test_recursion_limit(self):
        # Issue 9670
        # test that excessive recursion within a non-main thread causes
        # an exception rather than crashing the interpreter on platforms
        # like Mac OS X or FreeBSD which have small default stack sizes
        # for threads
        script = """if True:
            import threading

            def recurse():
                return recurse()

            def outer():
                try:
                    recurse()
                except RuntimeError:
                    pass

            w = threading.Thread(target=outer)
            w.start()
            w.join()
            print('end of main thread')
            """
        expected_output = "end of main thread\n"
        p = subprocess.Popen([sys.executable, "-c", script],
                             stdout=subprocess.PIPE)
        stdout, stderr = p.communicate()
        data = stdout.decode().replace('\r', '')
        self.assertEqual(p.returncode, 0, "Unexpected error")
        self.assertEqual(data, expected_output)