bpo-32327: Convert asyncio functions documented as coroutines to coroutines. (#4872)

Doc/library/asyncio-eventloop.rst

@@ -269,9 +269,8 @@ Creating connections
    socket type :py:data:`~socket.SOCK_STREAM`.  *protocol_factory* must be a
    callable returning a :ref:`protocol <asyncio-protocol>` instance.
 
-   This method is a :ref:`coroutine <coroutine>` which will try to
+   This method will try to establish the connection in the background.
-   establish the connection in the background.  When successful, the
+   When successful, it returns a ``(transport, protocol)`` pair.
-   coroutine returns a ``(transport, protocol)`` pair.
 
    The chronological synopsis of the underlying operation is as follows:
 
@@ -344,9 +343,8 @@ Creating connections
    :py:data:`~socket.SOCK_DGRAM`. *protocol_factory* must be a
    callable returning a :ref:`protocol <asyncio-protocol>` instance.
 
-   This method is a :ref:`coroutine <coroutine>` which will try to
+   This method will try to establish the connection in the background.
-   establish the connection in the background.  When successful, the
+   When successful, the it returns a ``(transport, protocol)`` pair.
-   coroutine returns a ``(transport, protocol)`` pair.
 
    Options changing how the connection is created:
 
@@ -395,9 +393,8 @@ Creating connections
    family is used to communicate between processes on the same machine
    efficiently.
 
-   This method is a :ref:`coroutine <coroutine>` which will try to
+   This method will try to establish the connection in the background.
-   establish the connection in the background.  When successful, the
+   When successful, the it returns a ``(transport, protocol)`` pair.
-   coroutine returns a ``(transport, protocol)`` pair.
 
    *path* is the name of a UNIX domain socket, and is required unless a *sock*
    parameter is specified.  Abstract UNIX sockets, :class:`str`,
@@ -459,8 +456,6 @@ Creating listening connections
      set this flag when being created. This option is not supported on
      Windows.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
    .. versionchanged:: 3.5
 
       On Windows with :class:`ProactorEventLoop`, SSL/TLS is now supported.
@@ -484,8 +479,6 @@ Creating listening connections
    parameter is specified.  Abstract UNIX sockets, :class:`str`,
    :class:`bytes`, and :class:`~pathlib.Path` paths are supported.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
    Availability: UNIX.
 
    .. versionchanged:: 3.7
@@ -507,8 +500,7 @@ Creating listening connections
    * *ssl* can be set to an :class:`~ssl.SSLContext` to enable SSL over the
      accepted connections.
 
-   This method is a :ref:`coroutine <coroutine>`.  When completed, the
+   When completed it returns a ``(transport, protocol)`` pair.
-   coroutine returns a ``(transport, protocol)`` pair.
 
    .. versionadded:: 3.5.3
 
@@ -565,7 +557,10 @@ Low-level socket operations
    With :class:`SelectorEventLoop` event loop, the socket *sock* must be
    non-blocking.
 
-   This method is a :ref:`coroutine <coroutine>`.
+   .. versionchanged:: 3.7
+      Even though the method was always documented as a coroutine
+      method, before Python 3.7 it returned a :class:`Future`.
+      Since Python 3.7, this is an ``async def`` method.
 
 .. coroutinemethod:: AbstractEventLoop.sock_recv_into(sock, buf)
 
@@ -578,8 +573,6 @@ Low-level socket operations
    With :class:`SelectorEventLoop` event loop, the socket *sock* must be
    non-blocking.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
    .. versionadded:: 3.7
 
 .. coroutinemethod:: AbstractEventLoop.sock_sendall(sock, data)
@@ -596,7 +589,10 @@ Low-level socket operations
    With :class:`SelectorEventLoop` event loop, the socket *sock* must be
    non-blocking.
 
-   This method is a :ref:`coroutine <coroutine>`.
+   .. versionchanged:: 3.7
+      Even though the method was always documented as a coroutine
+      method, before Python 3.7 it returned an :class:`Future`.
+      Since Python 3.7, this is an ``async def`` method.
 
 .. coroutinemethod:: AbstractEventLoop.sock_connect(sock, address)
 
@@ -606,8 +602,6 @@ Low-level socket operations
    With :class:`SelectorEventLoop` event loop, the socket *sock* must be
    non-blocking.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
    .. versionchanged:: 3.5.2
       ``address`` no longer needs to be resolved.  ``sock_connect``
       will try to check if the *address* is already resolved by calling
@@ -634,7 +628,10 @@ Low-level socket operations
 
    The socket *sock* must be non-blocking.
 
-   This method is a :ref:`coroutine <coroutine>`.
+   .. versionchanged:: 3.7
+      Even though the method was always documented as a coroutine
+      method, before Python 3.7 it returned a :class:`Future`.
+      Since Python 3.7, this is an ``async def`` method.
 
    .. seealso::
 
@@ -673,8 +670,6 @@ Use :class:`ProactorEventLoop` to support pipes on Windows.
    With :class:`SelectorEventLoop` event loop, the *pipe* is set to
    non-blocking mode.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
 .. coroutinemethod:: AbstractEventLoop.connect_write_pipe(protocol_factory, pipe)
 
    Register write pipe in eventloop.
@@ -687,8 +682,6 @@ Use :class:`ProactorEventLoop` to support pipes on Windows.
    With :class:`SelectorEventLoop` event loop, the *pipe* is set to
    non-blocking mode.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
 .. seealso::
 
    The :meth:`AbstractEventLoop.subprocess_exec` and
@@ -738,8 +731,6 @@ pool of processes). By default, an event loop uses a thread pool executor
    :ref:`Use functools.partial to pass keywords to the *func*
    <asyncio-pass-keywords>`.
 
-   This method is a :ref:`coroutine <coroutine>`.
-
    .. versionchanged:: 3.5.3
       :meth:`BaseEventLoop.run_in_executor` no longer configures the
       ``max_workers`` of the thread pool executor it creates, instead
@@ -747,6 +738,11 @@ pool of processes). By default, an event loop uses a thread pool executor
       (:class:`~concurrent.futures.ThreadPoolExecutor`) to set the
       default.
 
+   .. versionchanged:: 3.7
+      Even though the method was always documented as a coroutine
+      method, before Python 3.7 it returned a :class:`Future`.
+      Since Python 3.7, this is an ``async def`` method.
+
 .. method:: AbstractEventLoop.set_default_executor(executor)
 
    Set the default executor used by :meth:`run_in_executor`.
@@ -857,8 +853,6 @@ Server
 
       Wait until the :meth:`close` method completes.
 
-      This method is a :ref:`coroutine <coroutine>`.
-
    .. attribute:: sockets
 
       List of :class:`socket.socket` objects the server is listening to, or

Lib/asyncio/base_events.py

@@ -157,20 +157,6 @@ def _ipaddr_info(host, port, family, type, proto):
     return None
 
 
-def _ensure_resolved(address, *, family=0, type=socket.SOCK_STREAM, proto=0,
-                     flags=0, loop):
-    host, port = address[:2]
-    info = _ipaddr_info(host, port, family, type, proto)
-    if info is not None:
-        # "host" is already a resolved IP.
-        fut = loop.create_future()
-        fut.set_result([info])
-        return fut
-    else:
-        return loop.getaddrinfo(host, port, family=family, type=type,
-                                proto=proto, flags=flags)
-
-
 def _run_until_complete_cb(fut):
     exc = fut._exception
     if isinstance(exc, BaseException) and not isinstance(exc, Exception):
@@ -614,7 +600,7 @@ class BaseEventLoop(events.AbstractEventLoop):
         self._write_to_self()
         return handle
 
-    def run_in_executor(self, executor, func, *args):
+    async def run_in_executor(self, executor, func, *args):
         self._check_closed()
         if self._debug:
             self._check_callback(func, 'run_in_executor')
@@ -623,7 +609,8 @@ class BaseEventLoop(events.AbstractEventLoop):
             if executor is None:
                 executor = concurrent.futures.ThreadPoolExecutor()
                 self._default_executor = executor
-        return futures.wrap_future(executor.submit(func, *args), loop=self)
+        return await futures.wrap_future(
+            executor.submit(func, *args), loop=self)
 
     def set_default_executor(self, executor):
         self._default_executor = executor
@@ -652,17 +639,19 @@ class BaseEventLoop(events.AbstractEventLoop):
             logger.debug(msg)
         return addrinfo
 
-    def getaddrinfo(self, host, port, *,
+    async def getaddrinfo(self, host, port, *,
-                    family=0, type=0, proto=0, flags=0):
+                          family=0, type=0, proto=0, flags=0):
         if self._debug:
-            return self.run_in_executor(None, self._getaddrinfo_debug,
+            getaddr_func = self._getaddrinfo_debug
-                                        host, port, family, type, proto, flags)
         else:
-            return self.run_in_executor(None, socket.getaddrinfo,
+            getaddr_func = socket.getaddrinfo
-                                        host, port, family, type, proto, flags)
 
-    def getnameinfo(self, sockaddr, flags=0):
+        return await self.run_in_executor(
-        return self.run_in_executor(None, socket.getnameinfo, sockaddr, flags)
+            None, getaddr_func, host, port, family, type, proto, flags)
+
+    async def getnameinfo(self, sockaddr, flags=0):
+        return await self.run_in_executor(
+            None, socket.getnameinfo, sockaddr, flags)
 
     async def create_connection(self, protocol_factory, host=None, port=None,
                                 *, ssl=None, family=0,
@@ -703,25 +692,17 @@ class BaseEventLoop(events.AbstractEventLoop):
                 raise ValueError(
                     'host/port and sock can not be specified at the same time')
 
-            f1 = _ensure_resolved((host, port), family=family,
+            infos = await self._ensure_resolved(
-                                  type=socket.SOCK_STREAM, proto=proto,
+                (host, port), family=family,
-                                  flags=flags, loop=self)
+                type=socket.SOCK_STREAM, proto=proto, flags=flags, loop=self)
-            fs = [f1]
-            if local_addr is not None:
-                f2 = _ensure_resolved(local_addr, family=family,
-                                      type=socket.SOCK_STREAM, proto=proto,
-                                      flags=flags, loop=self)
-                fs.append(f2)
-            else:
-                f2 = None
-
-            await tasks.wait(fs, loop=self)
-
-            infos = f1.result()
             if not infos:
                 raise OSError('getaddrinfo() returned empty list')
-            if f2 is not None:
+
-                laddr_infos = f2.result()
+            if local_addr is not None:
+                laddr_infos = await self._ensure_resolved(
+                    local_addr, family=family,
+                    type=socket.SOCK_STREAM, proto=proto,
+                    flags=flags, loop=self)
                 if not laddr_infos:
                     raise OSError('getaddrinfo() returned empty list')
 
@@ -730,7 +711,7 @@ class BaseEventLoop(events.AbstractEventLoop):
                 try:
                     sock = socket.socket(family=family, type=type, proto=proto)
                     sock.setblocking(False)
-                    if f2 is not None:
+                    if local_addr is not None:
                         for _, _, _, _, laddr in laddr_infos:
                             try:
                                 sock.bind(laddr)
@@ -863,7 +844,7 @@ class BaseEventLoop(events.AbstractEventLoop):
                         assert isinstance(addr, tuple) and len(addr) == 2, (
                             '2-tuple is expected')
 
-                        infos = await _ensure_resolved(
+                        infos = await self._ensure_resolved(
                             addr, family=family, type=socket.SOCK_DGRAM,
                             proto=proto, flags=flags, loop=self)
                         if not infos:
@@ -946,10 +927,22 @@ class BaseEventLoop(events.AbstractEventLoop):
 
         return transport, protocol
 
+    async def _ensure_resolved(self, address, *,
+                               family=0, type=socket.SOCK_STREAM,
+                               proto=0, flags=0, loop):
+        host, port = address[:2]
+        info = _ipaddr_info(host, port, family, type, proto)
+        if info is not None:
+            # "host" is already a resolved IP.
+            return [info]
+        else:
+            return await loop.getaddrinfo(host, port, family=family, type=type,
+                                          proto=proto, flags=flags)
+
     async def _create_server_getaddrinfo(self, host, port, family, flags):
-        infos = await _ensure_resolved((host, port), family=family,
+        infos = await self._ensure_resolved((host, port), family=family,
-                                       type=socket.SOCK_STREAM,
+                                            type=socket.SOCK_STREAM,
-                                       flags=flags, loop=self)
+                                            flags=flags, loop=self)
         if not infos:
             raise OSError(f'getaddrinfo({host!r}) returned empty list')
         return infos

Lib/asyncio/proactor_events.py

@@ -432,20 +432,20 @@ class BaseProactorEventLoop(base_events.BaseEventLoop):
         # Close the event loop
         super().close()
 
-    def sock_recv(self, sock, n):
+    async def sock_recv(self, sock, n):
-        return self._proactor.recv(sock, n)
+        return await self._proactor.recv(sock, n)
 
-    def sock_recv_into(self, sock, buf):
+    async def sock_recv_into(self, sock, buf):
-        return self._proactor.recv_into(sock, buf)
+        return await self._proactor.recv_into(sock, buf)
 
-    def sock_sendall(self, sock, data):
+    async def sock_sendall(self, sock, data):
-        return self._proactor.send(sock, data)
+        return await self._proactor.send(sock, data)
 
-    def sock_connect(self, sock, address):
+    async def sock_connect(self, sock, address):
-        return self._proactor.connect(sock, address)
+        return await self._proactor.connect(sock, address)
 
-    def sock_accept(self, sock):
+    async def sock_accept(self, sock):
-        return self._proactor.accept(sock)
+        return await self._proactor.accept(sock)
 
     def _close_self_pipe(self):
         if self._self_reading_future is not None:

Lib/asyncio/selector_events.py

@@ -336,20 +336,18 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
         self._ensure_fd_no_transport(fd)
         return self._remove_writer(fd)
 
-    def sock_recv(self, sock, n):
+    async def sock_recv(self, sock, n):
         """Receive data from the socket.
 
         The return value is a bytes object representing the data received.
         The maximum amount of data to be received at once is specified by
         nbytes.
-
-        This method is a coroutine.
         """
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
         self._sock_recv(fut, None, sock, n)
-        return fut
+        return await fut
 
     def _sock_recv(self, fut, registered_fd, sock, n):
         # _sock_recv() can add itself as an I/O callback if the operation can't
@@ -372,19 +370,17 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
         else:
             fut.set_result(data)
 
-    def sock_recv_into(self, sock, buf):
+    async def sock_recv_into(self, sock, buf):
         """Receive data from the socket.
 
         The received data is written into *buf* (a writable buffer).
         The return value is the number of bytes written.
-
-        This method is a coroutine.
         """
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
         self._sock_recv_into(fut, None, sock, buf)
-        return fut
+        return await fut
 
     def _sock_recv_into(self, fut, registered_fd, sock, buf):
         # _sock_recv_into() can add itself as an I/O callback if the operation
@@ -408,7 +404,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
         else:
             fut.set_result(nbytes)
 
-    def sock_sendall(self, sock, data):
+    async def sock_sendall(self, sock, data):
         """Send data to the socket.
 
         The socket must be connected to a remote socket. This method continues
@@ -416,8 +412,6 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
         error occurs. None is returned on success. On error, an exception is
         raised, and there is no way to determine how much data, if any, was
         successfully processed by the receiving end of the connection.
-
-        This method is a coroutine.
         """
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
@@ -426,7 +420,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
             self._sock_sendall(fut, None, sock, data)
         else:
             fut.set_result(None)
-        return fut
+        return await fut
 
     def _sock_sendall(self, fut, registered_fd, sock, data):
         if registered_fd is not None:
@@ -459,11 +453,9 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
             raise ValueError("the socket must be non-blocking")
 
         if not hasattr(socket, 'AF_UNIX') or sock.family != socket.AF_UNIX:
-            resolved = base_events._ensure_resolved(
+            resolved = await self._ensure_resolved(
                 address, family=sock.family, proto=sock.proto, loop=self)
-            if not resolved.done():
+            _, _, _, _, address = resolved[0]
-                await resolved
-            _, _, _, _, address = resolved.result()[0]
 
         fut = self.create_future()
         self._sock_connect(fut, sock, address)
@@ -506,21 +498,19 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
         else:
             fut.set_result(None)
 
-    def sock_accept(self, sock):
+    async def sock_accept(self, sock):
         """Accept a connection.
 
         The socket must be bound to an address and listening for connections.
         The return value is a pair (conn, address) where conn is a new socket
         object usable to send and receive data on the connection, and address
         is the address bound to the socket on the other end of the connection.
-
-        This method is a coroutine.
         """
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
         self._sock_accept(fut, False, sock)
-        return fut
+        return await fut
 
     def _sock_accept(self, fut, registered, sock):
         fd = sock.fileno()

Lib/test/test_asyncio/test_base_events.py

@@ -217,14 +217,6 @@ class BaseEventLoopTests(test_utils.TestCase):
         self.loop.set_default_executor(executor)
         self.assertIs(executor, self.loop._default_executor)
 
-    def test_getnameinfo(self):
-        sockaddr = mock.Mock()
-        self.loop.run_in_executor = mock.Mock()
-        self.loop.getnameinfo(sockaddr)
-        self.assertEqual(
-            (None, socket.getnameinfo, sockaddr, 0),
-            self.loop.run_in_executor.call_args[0])
-
     def test_call_soon(self):
         def cb():
             pass
@@ -345,26 +337,6 @@ class BaseEventLoopTests(test_utils.TestCase):
         # check disabled if debug mode is disabled
         test_thread(self.loop, False, create_loop=True)
 
-    def test_run_once_in_executor_plain(self):
-        def cb():
-            pass
-        f = asyncio.Future(loop=self.loop)
-        executor = mock.Mock()
-        executor.submit.return_value = f
-
-        self.loop.set_default_executor(executor)
-
-        res = self.loop.run_in_executor(None, cb)
-        self.assertIs(f, res)
-
-        executor = mock.Mock()
-        executor.submit.return_value = f
-        res = self.loop.run_in_executor(executor, cb)
-        self.assertIs(f, res)
-        self.assertTrue(executor.submit.called)
-
-        f.cancel()  # Don't complain about abandoned Future.
-
     def test__run_once(self):
         h1 = asyncio.TimerHandle(time.monotonic() + 5.0, lambda: True, (),
                                  self.loop)
@@ -1007,6 +979,12 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
         self.loop = asyncio.new_event_loop()
         self.set_event_loop(self.loop)
 
+    @mock.patch('socket.getnameinfo')
+    def test_getnameinfo(self, m_gai):
+        m_gai.side_effect = lambda *args: 42
+        r = self.loop.run_until_complete(self.loop.getnameinfo(('abc', 123)))
+        self.assertEqual(r, 42)
+
     @patch_socket
     def test_create_connection_multiple_errors(self, m_socket):
 
@@ -1119,9 +1097,7 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
             OSError, self.loop.run_until_complete, coro)
 
     def test_create_connection_connect_err(self):
-        @asyncio.coroutine
+        async def getaddrinfo(*args, **kw):
-        def getaddrinfo(*args, **kw):
-            yield from []
             return [(2, 1, 6, '', ('107.6.106.82', 80))]
 
         def getaddrinfo_task(*args, **kwds):
@@ -1714,10 +1690,11 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
         self.assertTrue(m_log.error.called)
         self.assertFalse(sock.close.called)
         self.loop._remove_reader.assert_called_with(10)
-        self.loop.call_later.assert_called_with(constants.ACCEPT_RETRY_DELAY,
+        self.loop.call_later.assert_called_with(
-                                                # self.loop._start_serving
+            constants.ACCEPT_RETRY_DELAY,
-                                                mock.ANY,
+            # self.loop._start_serving
-                                                MyProto, sock, None, None, mock.ANY)
+            mock.ANY,
+            MyProto, sock, None, None, mock.ANY)
 
     def test_call_coroutine(self):
         @asyncio.coroutine
@@ -1738,7 +1715,8 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
             with self.assertRaises(TypeError):
                 self.loop.call_at(self.loop.time() + 60, func)
             with self.assertRaises(TypeError):
-                self.loop.run_in_executor(None, func)
+                self.loop.run_until_complete(
+                    self.loop.run_in_executor(None, func))
 
     @mock.patch('asyncio.base_events.logger')
     def test_log_slow_callbacks(self, m_logger):

Lib/test/test_asyncio/test_events.py

@@ -1702,7 +1702,7 @@ class EventLoopTestsMixin:
     def test_prompt_cancellation(self):
         r, w = socket.socketpair()
         r.setblocking(False)
-        f = self.loop.sock_recv(r, 1)
+        f = self.loop.create_task(self.loop.sock_recv(r, 1))
         ov = getattr(f, 'ov', None)
         if ov is not None:
             self.assertTrue(ov.pending)
@@ -1819,7 +1819,8 @@ class EventLoopTestsMixin:
         with self.assertRaises(RuntimeError):
             self.loop.call_at(self.loop.time() + .0, func)
         with self.assertRaises(RuntimeError):
-            self.loop.run_in_executor(None, func)
+            self.loop.run_until_complete(
+                self.loop.run_in_executor(None, func))
         with self.assertRaises(RuntimeError):
             self.loop.create_task(coro)
         with self.assertRaises(RuntimeError):

Lib/test/test_asyncio/test_proactor_events.py

@@ -483,27 +483,6 @@ class BaseProactorEventLoopTests(test_utils.TestCase):
         self.loop.close()
         self.assertFalse(self.loop._close_self_pipe.called)
 
-    def test_sock_recv(self):
-        self.loop.sock_recv(self.sock, 1024)
-        self.proactor.recv.assert_called_with(self.sock, 1024)
-
-    def test_sock_recv_into(self):
-        buf = bytearray(10)
-        self.loop.sock_recv_into(self.sock, buf)
-        self.proactor.recv_into.assert_called_with(self.sock, buf)
-
-    def test_sock_sendall(self):
-        self.loop.sock_sendall(self.sock, b'data')
-        self.proactor.send.assert_called_with(self.sock, b'data')
-
-    def test_sock_connect(self):
-        self.loop.sock_connect(self.sock, ('1.2.3.4', 123))
-        self.proactor.connect.assert_called_with(self.sock, ('1.2.3.4', 123))
-
-    def test_sock_accept(self):
-        self.loop.sock_accept(self.sock)
-        self.proactor.accept.assert_called_with(self.sock)
-
     def test_make_socket_transport(self):
         tr = self.loop._make_socket_transport(self.sock, asyncio.Protocol())
         self.assertIsInstance(tr, _ProactorSocketTransport)

Lib/test/test_asyncio/test_selector_events.py

@@ -176,9 +176,15 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
         sock = test_utils.mock_nonblocking_socket()
         self.loop._sock_recv = mock.Mock()
 
-        f = self.loop.sock_recv(sock, 1024)
+        f = self.loop.create_task(self.loop.sock_recv(sock, 1024))
-        self.assertIsInstance(f, asyncio.Future)
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
-        self.loop._sock_recv.assert_called_with(f, None, sock, 1024)
+
+        self.assertEqual(self.loop._sock_recv.call_args[0][1:],
+                         (None, sock, 1024))
+
+        f.cancel()
+        with self.assertRaises(asyncio.CancelledError):
+            self.loop.run_until_complete(f)
 
     def test_sock_recv_reconnection(self):
         sock = mock.Mock()
@@ -188,7 +194,11 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
 
         self.loop.add_reader = mock.Mock()
         self.loop.remove_reader = mock.Mock()
-        fut = self.loop.sock_recv(sock, 1024)
+        fut = self.loop.create_task(
+            self.loop.sock_recv(sock, 1024))
+
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
+
         callback = self.loop.add_reader.call_args[0][1]
         params = self.loop.add_reader.call_args[0][2:]
 
@@ -198,6 +208,8 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
         sock.recv.side_effect = OSError(9)
         callback(*params)
 
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
+
         self.assertIsInstance(fut.exception(), OSError)
         self.assertEqual((10,), self.loop.remove_reader.call_args[0])
 
@@ -245,18 +257,26 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
         sock = test_utils.mock_nonblocking_socket()
         self.loop._sock_sendall = mock.Mock()
 
-        f = self.loop.sock_sendall(sock, b'data')
+        f = self.loop.create_task(
-        self.assertIsInstance(f, asyncio.Future)
+            self.loop.sock_sendall(sock, b'data'))
+
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
+
         self.assertEqual(
-            (f, None, sock, b'data'),
+            (None, sock, b'data'),
-            self.loop._sock_sendall.call_args[0])
+            self.loop._sock_sendall.call_args[0][1:])
+
+        f.cancel()
+        with self.assertRaises(asyncio.CancelledError):
+            self.loop.run_until_complete(f)
 
     def test_sock_sendall_nodata(self):
         sock = test_utils.mock_nonblocking_socket()
         self.loop._sock_sendall = mock.Mock()
 
-        f = self.loop.sock_sendall(sock, b'')
+        f = self.loop.create_task(self.loop.sock_sendall(sock, b''))
-        self.assertIsInstance(f, asyncio.Future)
+        self.loop.run_until_complete(asyncio.sleep(0, loop=self.loop))
+
         self.assertTrue(f.done())
         self.assertIsNone(f.result())
         self.assertFalse(self.loop._sock_sendall.called)
@@ -269,7 +289,10 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
 
         self.loop.add_writer = mock.Mock()
         self.loop.remove_writer = mock.Mock()
-        fut = self.loop.sock_sendall(sock, b'data')
+        fut = self.loop.create_task(self.loop.sock_sendall(sock, b'data'))
+
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
+
         callback = self.loop.add_writer.call_args[0][1]
         params = self.loop.add_writer.call_args[0][2:]
 
@@ -279,6 +302,8 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
         sock.send.side_effect = OSError(9)
         callback(*params)
 
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
+
         self.assertIsInstance(fut.exception(), OSError)
         self.assertEqual((10,), self.loop.remove_writer.call_args[0])
 
@@ -402,17 +427,17 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
     def test_sock_connect_resolve_using_socket_params(self, m_gai):
         addr = ('need-resolution.com', 8080)
         sock = test_utils.mock_nonblocking_socket()
-        m_gai.side_effect = (None, None, None, None, ('127.0.0.1', 0))
+
-        m_gai._is_coroutine = False
+        m_gai.side_effect = \
+            lambda *args: [(None, None, None, None, ('127.0.0.1', 0))]
+
         con = self.loop.create_task(self.loop.sock_connect(sock, addr))
-        while not m_gai.called:
+        self.loop.run_until_complete(con)
-            self.loop._run_once()
         m_gai.assert_called_with(
             addr[0], addr[1], sock.family, sock.type, sock.proto, 0)
 
-        con.cancel()
+        self.loop.run_until_complete(con)
-        with self.assertRaises(asyncio.CancelledError):
+        sock.connect.assert_called_with(('127.0.0.1', 0))
-            self.loop.run_until_complete(con)
 
     def test__sock_connect(self):
         f = asyncio.Future(loop=self.loop)
@@ -487,10 +512,15 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
         sock = test_utils.mock_nonblocking_socket()
         self.loop._sock_accept = mock.Mock()
 
-        f = self.loop.sock_accept(sock)
+        f = self.loop.create_task(self.loop.sock_accept(sock))
-        self.assertIsInstance(f, asyncio.Future)
+        self.loop.run_until_complete(asyncio.sleep(0.01, loop=self.loop))
-        self.assertEqual(
+
-            (f, False, sock), self.loop._sock_accept.call_args[0])
+        self.assertFalse(self.loop._sock_accept.call_args[0][1])
+        self.assertIs(self.loop._sock_accept.call_args[0][2], sock)
+
+        f.cancel()
+        with self.assertRaises(asyncio.CancelledError):
+            self.loop.run_until_complete(f)
 
     def test__sock_accept(self):
         f = asyncio.Future(loop=self.loop)

Lib/test/test_asyncio/test_tasks.py

@@ -2545,19 +2545,26 @@ class RunCoroutineThreadsafeTests(test_utils.TestCase):
     def test_run_coroutine_threadsafe_task_factory_exception(self):
         """Test coroutine submission from a tread to an event loop
         when the task factory raise an exception."""
-        # Schedule the target
+
-        future = self.loop.run_in_executor(
+        def task_factory(loop, coro):
-            None, lambda: self.target(advance_coro=True))
+            raise NameError
-        # Set corrupted task factory
+
-        self.loop.set_task_factory(lambda loop, coro: wrong_name)
+        run = self.loop.create_task(
+            self.loop.run_in_executor(
+                None, lambda: self.target(advance_coro=True)))
+
         # Set exception handler
         callback = test_utils.MockCallback()
         self.loop.set_exception_handler(callback)
+
+        # Set corrupted task factory
+        self.loop.set_task_factory(task_factory)
+
         # Run event loop
         with self.assertRaises(NameError) as exc_context:
-            self.loop.run_until_complete(future)
+            self.loop.run_until_complete(run)
+
         # Check exceptions
-        self.assertIn('wrong_name', exc_context.exception.args[0])
         self.assertEqual(len(callback.call_args_list), 1)
         (loop, context), kwargs = callback.call_args
         self.assertEqual(context['exception'], exc_context.exception)

Lib/test/test_asyncio/test_windows_events.py

@@ -39,7 +39,7 @@ class ProactorTests(test_utils.TestCase):
     def test_close(self):
         a, b = socket.socketpair()
         trans = self.loop._make_socket_transport(a, asyncio.Protocol())
-        f = asyncio.ensure_future(self.loop.sock_recv(b, 100))
+        f = asyncio.ensure_future(self.loop.sock_recv(b, 100), loop=self.loop)
         trans.close()
         self.loop.run_until_complete(f)
         self.assertEqual(f.result(), b'')

Misc/NEWS.d/next/Library/2017-12-14-16-00-25.bpo-32327.bbkSxA.rst

@@ -0,0 +1,3 @@
+Convert asyncio functions that were documented as coroutines to coroutines.
+Affected functions: loop.sock_sendall, loop.sock_recv, loop.sock_accept,
+loop.run_in_executor, loop.getaddrinfo, loop.getnameinfo.