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Copy pathtest_streams.py
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1781 lines (1467 loc) · 67.8 KB
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"""Tests for streams.py."""
import contextlib
import gc
import io
import os
import queue
import pickle
import socket
import sys
import threading
import unittest
from unittest import mock
from test import support
try:
import ssl
except ImportError:
ssl = None
import asyncio
from asyncio.streams import _StreamProtocol, _ensure_can_read, _ensure_can_write
from test.test_asyncio import utils as test_utils
def tearDownModule():
asyncio.set_event_loop_policy(None)
class StreamModeTests(unittest.TestCase):
def test__ensure_can_read_ok(self):
self.assertIsNone(_ensure_can_read(asyncio.StreamMode.READ))
self.assertIsNone(_ensure_can_read(asyncio.StreamMode.READWRITE))
def test__ensure_can_read_fail(self):
with self.assertRaisesRegex(RuntimeError, "The stream is write-only"):
_ensure_can_read(asyncio.StreamMode.WRITE)
def test__ensure_can_write_ok(self):
self.assertIsNone(_ensure_can_write(asyncio.StreamMode.WRITE))
self.assertIsNone(_ensure_can_write(asyncio.StreamMode.READWRITE))
def test__ensure_can_write_fail(self):
with self.assertRaisesRegex(RuntimeError, "The stream is read-only"):
_ensure_can_write(asyncio.StreamMode.READ)
class StreamTests(test_utils.TestCase):
DATA = b'line1\nline2\nline3\n'
def setUp(self):
super().setUp()
self.loop = asyncio.new_event_loop()
self.set_event_loop(self.loop)
def tearDown(self):
# just in case if we have transport close callbacks
test_utils.run_briefly(self.loop)
self.loop.close()
gc.collect()
super().tearDown()
@mock.patch('asyncio.streams.events')
def test_ctor_global_loop(self, m_events):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
_asyncio_internal=True)
self.assertIs(stream._loop, m_events.get_event_loop.return_value)
def _basetest_open_connection(self, open_connection_fut):
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
with self.assertWarns(DeprecationWarning):
reader, writer = self.loop.run_until_complete(open_connection_fut)
writer.write(b'GET / HTTP/1.0\r\n\r\n')
f = reader.readline()
data = self.loop.run_until_complete(f)
self.assertEqual(data, b'HTTP/1.0 200 OK\r\n')
f = reader.read()
data = self.loop.run_until_complete(f)
self.assertTrue(data.endswith(b'\r\n\r\nTest message'))
writer.close()
self.assertEqual(messages, [])
def test_open_connection(self):
with test_utils.run_test_server() as httpd:
conn_fut = asyncio.open_connection(*httpd.address,
loop=self.loop)
self._basetest_open_connection(conn_fut)
@support.skip_unless_bind_unix_socket
def test_open_unix_connection(self):
with test_utils.run_test_unix_server() as httpd:
conn_fut = asyncio.open_unix_connection(httpd.address,
loop=self.loop)
self._basetest_open_connection(conn_fut)
def _basetest_open_connection_no_loop_ssl(self, open_connection_fut):
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
try:
with self.assertWarns(DeprecationWarning):
reader, writer = self.loop.run_until_complete(
open_connection_fut)
finally:
asyncio.set_event_loop(None)
writer.write(b'GET / HTTP/1.0\r\n\r\n')
f = reader.read()
data = self.loop.run_until_complete(f)
self.assertTrue(data.endswith(b'\r\n\r\nTest message'))
writer.close()
self.assertEqual(messages, [])
@unittest.skipIf(ssl is None, 'No ssl module')
def test_open_connection_no_loop_ssl(self):
with test_utils.run_test_server(use_ssl=True) as httpd:
conn_fut = asyncio.open_connection(
*httpd.address,
ssl=test_utils.dummy_ssl_context(),
loop=self.loop)
self._basetest_open_connection_no_loop_ssl(conn_fut)
@support.skip_unless_bind_unix_socket
@unittest.skipIf(ssl is None, 'No ssl module')
def test_open_unix_connection_no_loop_ssl(self):
with test_utils.run_test_unix_server(use_ssl=True) as httpd:
conn_fut = asyncio.open_unix_connection(
httpd.address,
ssl=test_utils.dummy_ssl_context(),
server_hostname='',
loop=self.loop)
self._basetest_open_connection_no_loop_ssl(conn_fut)
def _basetest_open_connection_error(self, open_connection_fut):
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
with self.assertWarns(DeprecationWarning):
reader, writer = self.loop.run_until_complete(open_connection_fut)
writer._protocol.connection_lost(ZeroDivisionError())
f = reader.read()
with self.assertRaises(ZeroDivisionError):
self.loop.run_until_complete(f)
writer.close()
test_utils.run_briefly(self.loop)
self.assertEqual(messages, [])
def test_open_connection_error(self):
with test_utils.run_test_server() as httpd:
conn_fut = asyncio.open_connection(*httpd.address,
loop=self.loop)
self._basetest_open_connection_error(conn_fut)
@support.skip_unless_bind_unix_socket
def test_open_unix_connection_error(self):
with test_utils.run_test_unix_server() as httpd:
conn_fut = asyncio.open_unix_connection(httpd.address,
loop=self.loop)
self._basetest_open_connection_error(conn_fut)
def test_feed_empty_data(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'')
self.assertEqual(b'', stream._buffer)
def test_feed_nonempty_data(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(self.DATA)
self.assertEqual(self.DATA, stream._buffer)
def test_read_zero(self):
# Read zero bytes.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(self.DATA)
data = self.loop.run_until_complete(stream.read(0))
self.assertEqual(b'', data)
self.assertEqual(self.DATA, stream._buffer)
def test_read(self):
# Read bytes.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
read_task = asyncio.Task(stream.read(30), loop=self.loop)
def cb():
stream.feed_data(self.DATA)
self.loop.call_soon(cb)
data = self.loop.run_until_complete(read_task)
self.assertEqual(self.DATA, data)
self.assertEqual(b'', stream._buffer)
def test_read_line_breaks(self):
# Read bytes without line breaks.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'line1')
stream.feed_data(b'line2')
data = self.loop.run_until_complete(stream.read(5))
self.assertEqual(b'line1', data)
self.assertEqual(b'line2', stream._buffer)
def test_read_eof(self):
# Read bytes, stop at eof.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
read_task = asyncio.Task(stream.read(1024), loop=self.loop)
def cb():
stream.feed_eof()
self.loop.call_soon(cb)
data = self.loop.run_until_complete(read_task)
self.assertEqual(b'', data)
self.assertEqual(b'', stream._buffer)
def test_read_until_eof(self):
# Read all bytes until eof.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
read_task = asyncio.Task(stream.read(-1), loop=self.loop)
def cb():
stream.feed_data(b'chunk1\n')
stream.feed_data(b'chunk2')
stream.feed_eof()
self.loop.call_soon(cb)
data = self.loop.run_until_complete(read_task)
self.assertEqual(b'chunk1\nchunk2', data)
self.assertEqual(b'', stream._buffer)
def test_read_exception(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'line\n')
data = self.loop.run_until_complete(stream.read(2))
self.assertEqual(b'li', data)
stream.set_exception(ValueError())
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.read(2))
def test_invalid_limit(self):
with self.assertRaisesRegex(ValueError, 'imit'):
asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=0, loop=self.loop,
_asyncio_internal=True)
with self.assertRaisesRegex(ValueError, 'imit'):
asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=-1, loop=self.loop,
_asyncio_internal=True)
def test_read_limit(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=3, loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'chunk')
data = self.loop.run_until_complete(stream.read(5))
self.assertEqual(b'chunk', data)
self.assertEqual(b'', stream._buffer)
def test_readline(self):
# Read one line. 'readline' will need to wait for the data
# to come from 'cb'
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'chunk1 ')
read_task = asyncio.Task(stream.readline(), loop=self.loop)
def cb():
stream.feed_data(b'chunk2 ')
stream.feed_data(b'chunk3 ')
stream.feed_data(b'\n chunk4')
self.loop.call_soon(cb)
line = self.loop.run_until_complete(read_task)
self.assertEqual(b'chunk1 chunk2 chunk3 \n', line)
self.assertEqual(b' chunk4', stream._buffer)
def test_readline_limit_with_existing_data(self):
# Read one line. The data is in Stream's buffer
# before the event loop is run.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=3, loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'li')
stream.feed_data(b'ne1\nline2\n')
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readline())
# The buffer should contain the remaining data after exception
self.assertEqual(b'line2\n', stream._buffer)
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=3, loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'li')
stream.feed_data(b'ne1')
stream.feed_data(b'li')
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readline())
# No b'\n' at the end. The 'limit' is set to 3. So before
# waiting for the new data in buffer, 'readline' will consume
# the entire buffer, and since the length of the consumed data
# is more than 3, it will raise a ValueError. The buffer is
# expected to be empty now.
self.assertEqual(b'', stream._buffer)
def test_at_eof(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
self.assertFalse(stream.at_eof())
stream.feed_data(b'some data\n')
self.assertFalse(stream.at_eof())
self.loop.run_until_complete(stream.readline())
self.assertFalse(stream.at_eof())
stream.feed_data(b'some data\n')
stream.feed_eof()
self.loop.run_until_complete(stream.readline())
self.assertTrue(stream.at_eof())
def test_readline_limit(self):
# Read one line. Streams are fed with data after
# their 'readline' methods are called.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=7, loop=self.loop,
_asyncio_internal=True)
def cb():
stream.feed_data(b'chunk1')
stream.feed_data(b'chunk2')
stream.feed_data(b'chunk3\n')
stream.feed_eof()
self.loop.call_soon(cb)
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readline())
# The buffer had just one line of data, and after raising
# a ValueError it should be empty.
self.assertEqual(b'', stream._buffer)
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=7, loop=self.loop,
_asyncio_internal=True)
def cb():
stream.feed_data(b'chunk1')
stream.feed_data(b'chunk2\n')
stream.feed_data(b'chunk3\n')
stream.feed_eof()
self.loop.call_soon(cb)
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readline())
self.assertEqual(b'chunk3\n', stream._buffer)
# check strictness of the limit
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=7, loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'1234567\n')
line = self.loop.run_until_complete(stream.readline())
self.assertEqual(b'1234567\n', line)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'12345678\n')
with self.assertRaises(ValueError) as cm:
self.loop.run_until_complete(stream.readline())
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'12345678')
with self.assertRaises(ValueError) as cm:
self.loop.run_until_complete(stream.readline())
self.assertEqual(b'', stream._buffer)
def test_readline_nolimit_nowait(self):
# All needed data for the first 'readline' call will be
# in the buffer.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(self.DATA[:6])
stream.feed_data(self.DATA[6:])
line = self.loop.run_until_complete(stream.readline())
self.assertEqual(b'line1\n', line)
self.assertEqual(b'line2\nline3\n', stream._buffer)
def test_readline_eof(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'some data')
stream.feed_eof()
line = self.loop.run_until_complete(stream.readline())
self.assertEqual(b'some data', line)
def test_readline_empty_eof(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_eof()
line = self.loop.run_until_complete(stream.readline())
self.assertEqual(b'', line)
def test_readline_read_byte_count(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(self.DATA)
self.loop.run_until_complete(stream.readline())
data = self.loop.run_until_complete(stream.read(7))
self.assertEqual(b'line2\nl', data)
self.assertEqual(b'ine3\n', stream._buffer)
def test_readline_exception(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'line\n')
data = self.loop.run_until_complete(stream.readline())
self.assertEqual(b'line\n', data)
stream.set_exception(ValueError())
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readline())
self.assertEqual(b'', stream._buffer)
def test_readuntil_separator(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
with self.assertRaisesRegex(ValueError, 'Separator should be'):
self.loop.run_until_complete(stream.readuntil(separator=b''))
def test_readuntil_multi_chunks(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'lineAAA')
data = self.loop.run_until_complete(stream.readuntil(separator=b'AAA'))
self.assertEqual(b'lineAAA', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'lineAAA')
data = self.loop.run_until_complete(stream.readuntil(b'AAA'))
self.assertEqual(b'lineAAA', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'lineAAAxxx')
data = self.loop.run_until_complete(stream.readuntil(b'AAA'))
self.assertEqual(b'lineAAA', data)
self.assertEqual(b'xxx', stream._buffer)
def test_readuntil_multi_chunks_1(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'QWEaa')
stream.feed_data(b'XYaa')
stream.feed_data(b'a')
data = self.loop.run_until_complete(stream.readuntil(b'aaa'))
self.assertEqual(b'QWEaaXYaaa', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'QWEaa')
stream.feed_data(b'XYa')
stream.feed_data(b'aa')
data = self.loop.run_until_complete(stream.readuntil(b'aaa'))
self.assertEqual(b'QWEaaXYaaa', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'aaa')
data = self.loop.run_until_complete(stream.readuntil(b'aaa'))
self.assertEqual(b'aaa', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'Xaaa')
data = self.loop.run_until_complete(stream.readuntil(b'aaa'))
self.assertEqual(b'Xaaa', data)
self.assertEqual(b'', stream._buffer)
stream.feed_data(b'XXX')
stream.feed_data(b'a')
stream.feed_data(b'a')
stream.feed_data(b'a')
data = self.loop.run_until_complete(stream.readuntil(b'aaa'))
self.assertEqual(b'XXXaaa', data)
self.assertEqual(b'', stream._buffer)
def test_readuntil_eof(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'some dataAA')
stream.feed_eof()
with self.assertRaises(asyncio.IncompleteReadError) as cm:
self.loop.run_until_complete(stream.readuntil(b'AAA'))
self.assertEqual(cm.exception.partial, b'some dataAA')
self.assertIsNone(cm.exception.expected)
self.assertEqual(b'', stream._buffer)
def test_readuntil_limit_found_sep(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop, limit=3,
_asyncio_internal=True)
stream.feed_data(b'some dataAA')
with self.assertRaisesRegex(asyncio.LimitOverrunError,
'not found') as cm:
self.loop.run_until_complete(stream.readuntil(b'AAA'))
self.assertEqual(b'some dataAA', stream._buffer)
stream.feed_data(b'A')
with self.assertRaisesRegex(asyncio.LimitOverrunError,
'is found') as cm:
self.loop.run_until_complete(stream.readuntil(b'AAA'))
self.assertEqual(b'some dataAAA', stream._buffer)
def test_readexactly_zero_or_less(self):
# Read exact number of bytes (zero or less).
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(self.DATA)
data = self.loop.run_until_complete(stream.readexactly(0))
self.assertEqual(b'', data)
self.assertEqual(self.DATA, stream._buffer)
with self.assertRaisesRegex(ValueError, 'less than zero'):
self.loop.run_until_complete(stream.readexactly(-1))
self.assertEqual(self.DATA, stream._buffer)
def test_readexactly(self):
# Read exact number of bytes.
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
n = 2 * len(self.DATA)
read_task = asyncio.Task(stream.readexactly(n), loop=self.loop)
def cb():
stream.feed_data(self.DATA)
stream.feed_data(self.DATA)
stream.feed_data(self.DATA)
self.loop.call_soon(cb)
data = self.loop.run_until_complete(read_task)
self.assertEqual(self.DATA + self.DATA, data)
self.assertEqual(self.DATA, stream._buffer)
def test_readexactly_limit(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
limit=3, loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'chunk')
data = self.loop.run_until_complete(stream.readexactly(5))
self.assertEqual(b'chunk', data)
self.assertEqual(b'', stream._buffer)
def test_readexactly_eof(self):
# Read exact number of bytes (eof).
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
n = 2 * len(self.DATA)
read_task = asyncio.Task(stream.readexactly(n), loop=self.loop)
def cb():
stream.feed_data(self.DATA)
stream.feed_eof()
self.loop.call_soon(cb)
with self.assertRaises(asyncio.IncompleteReadError) as cm:
self.loop.run_until_complete(read_task)
self.assertEqual(cm.exception.partial, self.DATA)
self.assertEqual(cm.exception.expected, n)
self.assertEqual(str(cm.exception),
'18 bytes read on a total of 36 expected bytes')
self.assertEqual(b'', stream._buffer)
def test_readexactly_exception(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_data(b'line\n')
data = self.loop.run_until_complete(stream.readexactly(2))
self.assertEqual(b'li', data)
stream.set_exception(ValueError())
self.assertRaises(
ValueError, self.loop.run_until_complete, stream.readexactly(2))
def test_exception(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
self.assertIsNone(stream.exception())
exc = ValueError()
stream.set_exception(exc)
self.assertIs(stream.exception(), exc)
def test_exception_waiter(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
async def set_err():
stream.set_exception(ValueError())
t1 = asyncio.Task(stream.readline(), loop=self.loop)
t2 = asyncio.Task(set_err(), loop=self.loop)
self.loop.run_until_complete(asyncio.wait([t1, t2]))
self.assertRaises(ValueError, t1.result)
def test_exception_cancel(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
t = asyncio.Task(stream.readline(), loop=self.loop)
test_utils.run_briefly(self.loop)
t.cancel()
test_utils.run_briefly(self.loop)
# The following line fails if set_exception() isn't careful.
stream.set_exception(RuntimeError('message'))
test_utils.run_briefly(self.loop)
self.assertIs(stream._waiter, None)
def test_start_server(self):
class MyServer:
def __init__(self, loop):
self.server = None
self.loop = loop
async def handle_client(self, client_reader, client_writer):
data = await client_reader.readline()
client_writer.write(data)
await client_writer.drain()
client_writer.close()
await client_writer.wait_closed()
def start(self):
sock = socket.create_server(('127.0.0.1', 0))
self.server = self.loop.run_until_complete(
asyncio.start_server(self.handle_client,
sock=sock,
loop=self.loop))
return sock.getsockname()
def handle_client_callback(self, client_reader, client_writer):
self.loop.create_task(self.handle_client(client_reader,
client_writer))
def start_callback(self):
sock = socket.create_server(('127.0.0.1', 0))
addr = sock.getsockname()
sock.close()
self.server = self.loop.run_until_complete(
asyncio.start_server(self.handle_client_callback,
host=addr[0], port=addr[1],
loop=self.loop))
return addr
def stop(self):
if self.server is not None:
self.server.close()
self.loop.run_until_complete(self.server.wait_closed())
self.server = None
async def client(addr):
with self.assertWarns(DeprecationWarning):
reader, writer = await asyncio.open_connection(
*addr, loop=self.loop)
# send a line
writer.write(b"hello world!\n")
# read it back
msgback = await reader.readline()
writer.close()
await writer.wait_closed()
return msgback
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
# test the server variant with a coroutine as client handler
server = MyServer(self.loop)
with self.assertWarns(DeprecationWarning):
addr = server.start()
msg = self.loop.run_until_complete(asyncio.Task(client(addr),
loop=self.loop))
server.stop()
self.assertEqual(msg, b"hello world!\n")
# test the server variant with a callback as client handler
server = MyServer(self.loop)
with self.assertWarns(DeprecationWarning):
addr = server.start_callback()
msg = self.loop.run_until_complete(asyncio.Task(client(addr),
loop=self.loop))
server.stop()
self.assertEqual(msg, b"hello world!\n")
self.assertEqual(messages, [])
@support.skip_unless_bind_unix_socket
def test_start_unix_server(self):
class MyServer:
def __init__(self, loop, path):
self.server = None
self.loop = loop
self.path = path
async def handle_client(self, client_reader, client_writer):
data = await client_reader.readline()
client_writer.write(data)
await client_writer.drain()
client_writer.close()
await client_writer.wait_closed()
def start(self):
self.server = self.loop.run_until_complete(
asyncio.start_unix_server(self.handle_client,
path=self.path,
loop=self.loop))
def handle_client_callback(self, client_reader, client_writer):
self.loop.create_task(self.handle_client(client_reader,
client_writer))
def start_callback(self):
start = asyncio.start_unix_server(self.handle_client_callback,
path=self.path,
loop=self.loop)
self.server = self.loop.run_until_complete(start)
def stop(self):
if self.server is not None:
self.server.close()
self.loop.run_until_complete(self.server.wait_closed())
self.server = None
async def client(path):
with self.assertWarns(DeprecationWarning):
reader, writer = await asyncio.open_unix_connection(
path, loop=self.loop)
# send a line
writer.write(b"hello world!\n")
# read it back
msgback = await reader.readline()
writer.close()
await writer.wait_closed()
return msgback
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
# test the server variant with a coroutine as client handler
with test_utils.unix_socket_path() as path:
server = MyServer(self.loop, path)
with self.assertWarns(DeprecationWarning):
server.start()
msg = self.loop.run_until_complete(asyncio.Task(client(path),
loop=self.loop))
server.stop()
self.assertEqual(msg, b"hello world!\n")
# test the server variant with a callback as client handler
with test_utils.unix_socket_path() as path:
server = MyServer(self.loop, path)
with self.assertWarns(DeprecationWarning):
server.start_callback()
msg = self.loop.run_until_complete(asyncio.Task(client(path),
loop=self.loop))
server.stop()
self.assertEqual(msg, b"hello world!\n")
self.assertEqual(messages, [])
@unittest.skipIf(sys.platform == 'win32', "Don't have pipes")
def test_read_all_from_pipe_reader(self):
# See asyncio issue 168. This test is derived from the example
# subprocess_attach_read_pipe.py, but we configure the
# Stream's limit so that twice it is less than the size
# of the data writter. Also we must explicitly attach a child
# watcher to the event loop.
code = """\
import os, sys
fd = int(sys.argv[1])
os.write(fd, b'data')
os.close(fd)
"""
rfd, wfd = os.pipe()
args = [sys.executable, '-c', code, str(wfd)]
pipe = open(rfd, 'rb', 0)
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop, limit=1,
_asyncio_internal=True)
protocol = _StreamProtocol(stream, loop=self.loop,
_asyncio_internal=True)
transport, _ = self.loop.run_until_complete(
self.loop.connect_read_pipe(lambda: protocol, pipe))
watcher = asyncio.SafeChildWatcher()
watcher.attach_loop(self.loop)
try:
asyncio.set_child_watcher(watcher)
create = asyncio.create_subprocess_exec(*args,
pass_fds={wfd},
loop=self.loop)
proc = self.loop.run_until_complete(create)
self.loop.run_until_complete(proc.wait())
finally:
asyncio.set_child_watcher(None)
os.close(wfd)
data = self.loop.run_until_complete(stream.read(-1))
self.assertEqual(data, b'data')
def test_streamreader_constructor(self):
self.addCleanup(asyncio.set_event_loop, None)
asyncio.set_event_loop(self.loop)
# asyncio issue #184: Ensure that _StreamProtocol constructor
# retrieves the current loop if the loop parameter is not set
reader = asyncio.Stream(mode=asyncio.StreamMode.READ,
_asyncio_internal=True)
self.assertIs(reader._loop, self.loop)
def test_streamreaderprotocol_constructor(self):
self.addCleanup(asyncio.set_event_loop, None)
asyncio.set_event_loop(self.loop)
# asyncio issue #184: Ensure that _StreamProtocol constructor
# retrieves the current loop if the loop parameter is not set
stream = mock.Mock()
protocol = _StreamProtocol(stream, _asyncio_internal=True)
self.assertIs(protocol._loop, self.loop)
def test_drain_raises_deprecated(self):
# See http://bugs.python.org/issue25441
# This test should not use asyncio for the mock server; the
# whole point of the test is to test for a bug in drain()
# where it never gives up the event loop but the socket is
# closed on the server side.
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
q = queue.Queue()
def server():
# Runs in a separate thread.
with socket.create_server(('127.0.0.1', 0)) as sock:
addr = sock.getsockname()
q.put(addr)
clt, _ = sock.accept()
clt.close()
async def client(host, port):
with self.assertWarns(DeprecationWarning):
reader, writer = await asyncio.open_connection(
host, port, loop=self.loop)
while True:
writer.write(b"foo\n")
await writer.drain()
# Start the server thread and wait for it to be listening.
thread = threading.Thread(target=server)
thread.setDaemon(True)
thread.start()
addr = q.get()
# Should not be stuck in an infinite loop.
with self.assertRaises((ConnectionResetError, ConnectionAbortedError,
BrokenPipeError)):
self.loop.run_until_complete(client(*addr))
# Clean up the thread. (Only on success; on failure, it may
# be stuck in accept().)
thread.join()
self.assertEqual([], messages)
def test_drain_raises(self):
# See http://bugs.python.org/issue25441
# This test should not use asyncio for the mock server; the
# whole point of the test is to test for a bug in drain()
# where it never gives up the event loop but the socket is
# closed on the server side.
messages = []
self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
q = queue.Queue()
def server():
# Runs in a separate thread.
with socket.create_server(('localhost', 0)) as sock:
addr = sock.getsockname()
q.put(addr)
clt, _ = sock.accept()
clt.close()
async def client(host, port):
stream = await asyncio.connect(host, port)
while True:
stream.write(b"foo\n")
await stream.drain()
# Start the server thread and wait for it to be listening.
thread = threading.Thread(target=server)
thread.setDaemon(True)
thread.start()
addr = q.get()
# Should not be stuck in an infinite loop.
with self.assertRaises((ConnectionResetError, ConnectionAbortedError,
BrokenPipeError)):
self.loop.run_until_complete(client(*addr))
# Clean up the thread. (Only on success; on failure, it may
# be stuck in accept().)
thread.join()
self.assertEqual([], messages)
def test___repr__(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
self.assertEqual("<Stream mode=StreamMode.READ>", repr(stream))
def test___repr__nondefault_limit(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop, limit=123,
_asyncio_internal=True)
self.assertEqual("<Stream mode=StreamMode.READ limit=123>", repr(stream))
def test___repr__eof(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,
loop=self.loop,
_asyncio_internal=True)
stream.feed_eof()
self.assertEqual("<Stream mode=StreamMode.READ eof>", repr(stream))
def test___repr__data(self):
stream = asyncio.Stream(mode=asyncio.StreamMode.READ,