| # test asynchat |
| |
| from test import support |
| |
| # If this fails, the test will be skipped. |
| thread = support.import_module('_thread') |
| |
| import asyncore, asynchat, socket, time |
| import unittest |
| import sys |
| try: |
| import threading |
| except ImportError: |
| threading = None |
| |
| HOST = support.HOST |
| SERVER_QUIT = b'QUIT\n' |
| TIMEOUT = 3.0 |
| |
| if threading: |
| class echo_server(threading.Thread): |
| # parameter to determine the number of bytes passed back to the |
| # client each send |
| chunk_size = 1 |
| |
| def __init__(self, event): |
| threading.Thread.__init__(self) |
| self.event = event |
| self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
| self.port = support.bind_port(self.sock) |
| # This will be set if the client wants us to wait before echoing data |
| # back. |
| self.start_resend_event = None |
| |
| def run(self): |
| self.sock.listen(1) |
| self.event.set() |
| conn, client = self.sock.accept() |
| self.buffer = b"" |
| # collect data until quit message is seen |
| while SERVER_QUIT not in self.buffer: |
| data = conn.recv(1) |
| if not data: |
| break |
| self.buffer = self.buffer + data |
| |
| # remove the SERVER_QUIT message |
| self.buffer = self.buffer.replace(SERVER_QUIT, b'') |
| |
| if self.start_resend_event: |
| self.start_resend_event.wait() |
| |
| # re-send entire set of collected data |
| try: |
| # this may fail on some tests, such as test_close_when_done, since |
| # the client closes the channel when it's done sending |
| while self.buffer: |
| n = conn.send(self.buffer[:self.chunk_size]) |
| time.sleep(0.001) |
| self.buffer = self.buffer[n:] |
| except: |
| pass |
| |
| conn.close() |
| self.sock.close() |
| |
| class echo_client(asynchat.async_chat): |
| |
| def __init__(self, terminator, server_port): |
| asynchat.async_chat.__init__(self) |
| self.contents = [] |
| self.create_socket(socket.AF_INET, socket.SOCK_STREAM) |
| self.connect((HOST, server_port)) |
| self.set_terminator(terminator) |
| self.buffer = b"" |
| |
| def handle_connect(self): |
| pass |
| |
| if sys.platform == 'darwin': |
| # select.poll returns a select.POLLHUP at the end of the tests |
| # on darwin, so just ignore it |
| def handle_expt(self): |
| pass |
| |
| def collect_incoming_data(self, data): |
| self.buffer += data |
| |
| def found_terminator(self): |
| self.contents.append(self.buffer) |
| self.buffer = b"" |
| |
| def start_echo_server(): |
| event = threading.Event() |
| s = echo_server(event) |
| s.start() |
| event.wait() |
| event.clear() |
| time.sleep(0.01) # Give server time to start accepting. |
| return s, event |
| |
| |
| @unittest.skipUnless(threading, 'Threading required for this test.') |
| class TestAsynchat(unittest.TestCase): |
| usepoll = False |
| |
| def setUp (self): |
| self._threads = support.threading_setup() |
| |
| def tearDown (self): |
| support.threading_cleanup(*self._threads) |
| |
| def line_terminator_check(self, term, server_chunk): |
| event = threading.Event() |
| s = echo_server(event) |
| s.chunk_size = server_chunk |
| s.start() |
| event.wait() |
| event.clear() |
| time.sleep(0.01) # Give server time to start accepting. |
| c = echo_client(term, s.port) |
| c.push(b"hello ") |
| c.push(b"world" + term) |
| c.push(b"I'm not dead yet!" + term) |
| c.push(SERVER_QUIT) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"]) |
| |
| # the line terminator tests below check receiving variously-sized |
| # chunks back from the server in order to exercise all branches of |
| # async_chat.handle_read |
| |
| def test_line_terminator1(self): |
| # test one-character terminator |
| for l in (1,2,3): |
| self.line_terminator_check(b'\n', l) |
| |
| def test_line_terminator2(self): |
| # test two-character terminator |
| for l in (1,2,3): |
| self.line_terminator_check(b'\r\n', l) |
| |
| def test_line_terminator3(self): |
| # test three-character terminator |
| for l in (1,2,3): |
| self.line_terminator_check(b'qqq', l) |
| |
| def numeric_terminator_check(self, termlen): |
| # Try reading a fixed number of bytes |
| s, event = start_echo_server() |
| c = echo_client(termlen, s.port) |
| data = b"hello world, I'm not dead yet!\n" |
| c.push(data) |
| c.push(SERVER_QUIT) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, [data[:termlen]]) |
| |
| def test_numeric_terminator1(self): |
| # check that ints & longs both work (since type is |
| # explicitly checked in async_chat.handle_read) |
| self.numeric_terminator_check(1) |
| |
| def test_numeric_terminator2(self): |
| self.numeric_terminator_check(6) |
| |
| def test_none_terminator(self): |
| # Try reading a fixed number of bytes |
| s, event = start_echo_server() |
| c = echo_client(None, s.port) |
| data = b"hello world, I'm not dead yet!\n" |
| c.push(data) |
| c.push(SERVER_QUIT) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, []) |
| self.assertEqual(c.buffer, data) |
| |
| def test_simple_producer(self): |
| s, event = start_echo_server() |
| c = echo_client(b'\n', s.port) |
| data = b"hello world\nI'm not dead yet!\n" |
| p = asynchat.simple_producer(data+SERVER_QUIT, buffer_size=8) |
| c.push_with_producer(p) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"]) |
| |
| def test_string_producer(self): |
| s, event = start_echo_server() |
| c = echo_client(b'\n', s.port) |
| data = b"hello world\nI'm not dead yet!\n" |
| c.push_with_producer(data+SERVER_QUIT) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"]) |
| |
| def test_empty_line(self): |
| # checks that empty lines are handled correctly |
| s, event = start_echo_server() |
| c = echo_client(b'\n', s.port) |
| c.push(b"hello world\n\nI'm not dead yet!\n") |
| c.push(SERVER_QUIT) |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, |
| [b"hello world", b"", b"I'm not dead yet!"]) |
| |
| def test_close_when_done(self): |
| s, event = start_echo_server() |
| s.start_resend_event = threading.Event() |
| c = echo_client(b'\n', s.port) |
| c.push(b"hello world\nI'm not dead yet!\n") |
| c.push(SERVER_QUIT) |
| c.close_when_done() |
| asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01) |
| |
| # Only allow the server to start echoing data back to the client after |
| # the client has closed its connection. This prevents a race condition |
| # where the server echoes all of its data before we can check that it |
| # got any down below. |
| s.start_resend_event.set() |
| s.join(timeout=TIMEOUT) |
| if s.is_alive(): |
| self.fail("join() timed out") |
| |
| self.assertEqual(c.contents, []) |
| # the server might have been able to send a byte or two back, but this |
| # at least checks that it received something and didn't just fail |
| # (which could still result in the client not having received anything) |
| self.assertGreater(len(s.buffer), 0) |
| |
| |
| class TestAsynchat_WithPoll(TestAsynchat): |
| usepoll = True |
| |
| class TestHelperFunctions(unittest.TestCase): |
| def test_find_prefix_at_end(self): |
| self.assertEqual(asynchat.find_prefix_at_end("qwerty\r", "\r\n"), 1) |
| self.assertEqual(asynchat.find_prefix_at_end("qwertydkjf", "\r\n"), 0) |
| |
| class TestFifo(unittest.TestCase): |
| def test_basic(self): |
| f = asynchat.fifo() |
| f.push(7) |
| f.push(b'a') |
| self.assertEqual(len(f), 2) |
| self.assertEqual(f.first(), 7) |
| self.assertEqual(f.pop(), (1, 7)) |
| self.assertEqual(len(f), 1) |
| self.assertEqual(f.first(), b'a') |
| self.assertEqual(f.is_empty(), False) |
| self.assertEqual(f.pop(), (1, b'a')) |
| self.assertEqual(len(f), 0) |
| self.assertEqual(f.is_empty(), True) |
| self.assertEqual(f.pop(), (0, None)) |
| |
| def test_given_list(self): |
| f = asynchat.fifo([b'x', 17, 3]) |
| self.assertEqual(len(f), 3) |
| self.assertEqual(f.pop(), (1, b'x')) |
| self.assertEqual(f.pop(), (1, 17)) |
| self.assertEqual(f.pop(), (1, 3)) |
| self.assertEqual(f.pop(), (0, None)) |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |