288 lines
9.2 KiB
Python
288 lines
9.2 KiB
Python
# test asynchat
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from test import support
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from test.support import socket_helper
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import asynchat
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import asyncore
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import errno
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import socket
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import sys
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import threading
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import time
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import unittest
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import unittest.mock
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HOST = socket_helper.HOST
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SERVER_QUIT = b'QUIT\n'
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class echo_server(threading.Thread):
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# parameter to determine the number of bytes passed back to the
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# client each send
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chunk_size = 1
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def __init__(self, event):
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threading.Thread.__init__(self)
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self.event = event
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.port = socket_helper.bind_port(self.sock)
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# This will be set if the client wants us to wait before echoing
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# data back.
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self.start_resend_event = None
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def run(self):
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self.sock.listen()
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self.event.set()
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conn, client = self.sock.accept()
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self.buffer = b""
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# collect data until quit message is seen
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while SERVER_QUIT not in self.buffer:
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data = conn.recv(1)
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if not data:
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break
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self.buffer = self.buffer + data
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# remove the SERVER_QUIT message
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self.buffer = self.buffer.replace(SERVER_QUIT, b'')
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if self.start_resend_event:
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self.start_resend_event.wait()
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# re-send entire set of collected data
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try:
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# this may fail on some tests, such as test_close_when_done,
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# since the client closes the channel when it's done sending
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while self.buffer:
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n = conn.send(self.buffer[:self.chunk_size])
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time.sleep(0.001)
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self.buffer = self.buffer[n:]
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except:
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pass
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conn.close()
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self.sock.close()
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class echo_client(asynchat.async_chat):
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def __init__(self, terminator, server_port):
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asynchat.async_chat.__init__(self)
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self.contents = []
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self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
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self.connect((HOST, server_port))
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self.set_terminator(terminator)
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self.buffer = b""
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def handle_connect(self):
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pass
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if sys.platform == 'darwin':
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# select.poll returns a select.POLLHUP at the end of the tests
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# on darwin, so just ignore it
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def handle_expt(self):
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pass
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def collect_incoming_data(self, data):
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self.buffer += data
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def found_terminator(self):
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self.contents.append(self.buffer)
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self.buffer = b""
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def start_echo_server():
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event = threading.Event()
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s = echo_server(event)
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s.start()
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event.wait()
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event.clear()
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time.sleep(0.01) # Give server time to start accepting.
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return s, event
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class TestAsynchat(unittest.TestCase):
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usepoll = False
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def setUp(self):
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self._threads = support.threading_setup()
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def tearDown(self):
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support.threading_cleanup(*self._threads)
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def line_terminator_check(self, term, server_chunk):
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event = threading.Event()
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s = echo_server(event)
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s.chunk_size = server_chunk
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s.start()
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event.wait()
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event.clear()
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time.sleep(0.01) # Give server time to start accepting.
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c = echo_client(term, s.port)
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c.push(b"hello ")
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c.push(b"world" + term)
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c.push(b"I'm not dead yet!" + term)
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c.push(SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"])
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# the line terminator tests below check receiving variously-sized
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# chunks back from the server in order to exercise all branches of
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# async_chat.handle_read
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def test_line_terminator1(self):
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# test one-character terminator
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for l in (1, 2, 3):
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self.line_terminator_check(b'\n', l)
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def test_line_terminator2(self):
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# test two-character terminator
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for l in (1, 2, 3):
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self.line_terminator_check(b'\r\n', l)
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def test_line_terminator3(self):
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# test three-character terminator
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for l in (1, 2, 3):
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self.line_terminator_check(b'qqq', l)
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def numeric_terminator_check(self, termlen):
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# Try reading a fixed number of bytes
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s, event = start_echo_server()
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c = echo_client(termlen, s.port)
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data = b"hello world, I'm not dead yet!\n"
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c.push(data)
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c.push(SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [data[:termlen]])
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def test_numeric_terminator1(self):
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# check that ints & longs both work (since type is
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# explicitly checked in async_chat.handle_read)
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self.numeric_terminator_check(1)
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def test_numeric_terminator2(self):
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self.numeric_terminator_check(6)
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def test_none_terminator(self):
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# Try reading a fixed number of bytes
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s, event = start_echo_server()
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c = echo_client(None, s.port)
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data = b"hello world, I'm not dead yet!\n"
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c.push(data)
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c.push(SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [])
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self.assertEqual(c.buffer, data)
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def test_simple_producer(self):
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s, event = start_echo_server()
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c = echo_client(b'\n', s.port)
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data = b"hello world\nI'm not dead yet!\n"
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p = asynchat.simple_producer(data+SERVER_QUIT, buffer_size=8)
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c.push_with_producer(p)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"])
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def test_string_producer(self):
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s, event = start_echo_server()
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c = echo_client(b'\n', s.port)
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data = b"hello world\nI'm not dead yet!\n"
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c.push_with_producer(data+SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [b"hello world", b"I'm not dead yet!"])
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def test_empty_line(self):
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# checks that empty lines are handled correctly
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s, event = start_echo_server()
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c = echo_client(b'\n', s.port)
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c.push(b"hello world\n\nI'm not dead yet!\n")
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c.push(SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents,
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[b"hello world", b"", b"I'm not dead yet!"])
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def test_close_when_done(self):
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s, event = start_echo_server()
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s.start_resend_event = threading.Event()
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c = echo_client(b'\n', s.port)
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c.push(b"hello world\nI'm not dead yet!\n")
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c.push(SERVER_QUIT)
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c.close_when_done()
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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# Only allow the server to start echoing data back to the client after
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# the client has closed its connection. This prevents a race condition
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# where the server echoes all of its data before we can check that it
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# got any down below.
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s.start_resend_event.set()
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support.join_thread(s)
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self.assertEqual(c.contents, [])
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# the server might have been able to send a byte or two back, but this
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# at least checks that it received something and didn't just fail
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# (which could still result in the client not having received anything)
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self.assertGreater(len(s.buffer), 0)
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def test_push(self):
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# Issue #12523: push() should raise a TypeError if it doesn't get
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# a bytes string
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s, event = start_echo_server()
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c = echo_client(b'\n', s.port)
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data = b'bytes\n'
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c.push(data)
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c.push(bytearray(data))
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c.push(memoryview(data))
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self.assertRaises(TypeError, c.push, 10)
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self.assertRaises(TypeError, c.push, 'unicode')
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c.push(SERVER_QUIT)
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asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
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support.join_thread(s)
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self.assertEqual(c.contents, [b'bytes', b'bytes', b'bytes'])
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class TestAsynchat_WithPoll(TestAsynchat):
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usepoll = True
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class TestAsynchatMocked(unittest.TestCase):
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def test_blockingioerror(self):
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# Issue #16133: handle_read() must ignore BlockingIOError
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sock = unittest.mock.Mock()
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sock.recv.side_effect = BlockingIOError(errno.EAGAIN)
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dispatcher = asynchat.async_chat()
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dispatcher.set_socket(sock)
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self.addCleanup(dispatcher.del_channel)
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with unittest.mock.patch.object(dispatcher, 'handle_error') as error:
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dispatcher.handle_read()
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self.assertFalse(error.called)
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class TestHelperFunctions(unittest.TestCase):
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def test_find_prefix_at_end(self):
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self.assertEqual(asynchat.find_prefix_at_end("qwerty\r", "\r\n"), 1)
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self.assertEqual(asynchat.find_prefix_at_end("qwertydkjf", "\r\n"), 0)
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class TestNotConnected(unittest.TestCase):
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def test_disallow_negative_terminator(self):
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# Issue #11259
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client = asynchat.async_chat()
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self.assertRaises(ValueError, client.set_terminator, -1)
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if __name__ == "__main__":
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unittest.main()
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