iostream_test.py 文件源码

def test_large_read_until(self):
        # Performance test: read_until used to have a quadratic component
        # so a read_until of 4MB would take 8 seconds; now it takes 0.25
        # seconds.
        server, client = self.make_iostream_pair()
        try:
            # This test fails on pypy with ssl.  I think it's because
            # pypy's gc defeats moves objects, breaking the
            # "frozen write buffer" assumption.
            if (isinstance(server, SSLIOStream) and
                    platform.python_implementation() == 'PyPy'):
                raise unittest.SkipTest(
                    "pypy gc causes problems with openssl")
            NUM_KB = 4096
            for i in range(NUM_KB):
                client.write(b"A" * 1024)
            client.write(b"\r\n")
            server.read_until(b"\r\n", self.stop)
            data = self.wait()
            self.assertEqual(len(data), NUM_KB * 1024 + 2)
        finally:
            server.close()
            client.close()