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gh-72889: remove redundant `mock.Mock()._is_coroutine = False` workarounds by graingert · Pull Request #94926 · python/cpython · GitHub

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gh-72889: remove redundant mock.Mock()._is_coroutine = False workarounds #94926

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Merged
gvanrossum merged 2 commits into from
Jul 17, 2022
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gh-72889: remove redundant mock.Mock()._is_coroutine = False workarounds #94926

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bfafdb5
remove redundant mock.Mock()._is_coroutine = False workarounds
graingert Jul 17, 2022
d794dfd
Merge branch 'main' into remove-redudant-mock-is-coroutine-workarounds
graingert Jul 17, 2022
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10 changes: 0 additions & 10 deletions Lib/test/test_asyncio/test_base_events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,6 @@ def mock_socket_module():

m_socket.socket = mock.MagicMock()
m_socket.socket.return_value = test_utils.mock_nonblocking_socket()
m_socket.getaddrinfo._is_coroutine = False

return m_socket

Expand Down Expand Up @@ -1286,9 +1285,7 @@ def _test_create_connection_ip_addr(self, m_socket, allow_inet_pton):
sock = m_socket.socket.return_value

self.loop._add_reader = mock.Mock()
self.loop._add_reader._is_coroutine = False
Comment on lines 1287 to -1289

graingert Jul 17, 2022 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

when asyncio.iscoroutinefunction was implemented as:

cpython/Lib/asyncio/coroutines.py

Lines 245 to 248 in 2f84144

def iscoroutinefunction(func):
"""Return True if func is a decorated coroutine function."""
return (getattr(func, '_is_coroutine', False) or
_inspect_iscoroutinefunction(func))

this meant

self.loop._add_reader = mock.Mock()
assert asyncio.iscoroutinefunction(self.loop._add_reader) is True  # mock objects have a truthy _is_coroutine attribute!
self.loop._add_reader._is_coroutine = False
assert asyncio.iscoroutinefunction(self.loop._add_reader) is False  # patching it works around the issue

however the implementation was changed to use a marker object:

cpython/Lib/asyncio/coroutines.py

Lines 16 to 23 in ec4745b

# A marker for iscoroutinefunction.
_is_coroutine = object()
def iscoroutinefunction(func):
"""Return True if func is a decorated coroutine function."""
return (inspect.iscoroutinefunction(func) or
getattr(func, '_is_coroutine', None) is _is_coroutine)

and so now the _is_coroutine = False work-around is redundant:

self.loop._add_reader = mock.Mock()
assert asyncio.iscoroutinefunction(self.loop._add_reader) is False  # mock objects have an _is_coroutine but it's not the asyncio.coroutines._is_coroutine sentinel
self.loop._add_reader._is_coroutine = False
assert asyncio.iscoroutinefunction(self.loop._add_reader) is False  # it's still False so the workaround is redundant
self.loop._add_writer = mock.Mock()
self.loop._add_writer._is_coroutine = False

coro = self.loop.create_connection(asyncio.Protocol, '1.2.3.4', 80)
t, p = self.loop.run_until_complete(coro)
Expand Down Expand Up @@ -1330,9 +1327,7 @@ def test_create_connection_ipv6_scope(self, m_socket):
sock.family = socket.AF_INET6

self.loop._add_reader = mock.Mock()
self.loop._add_reader._is_coroutine = False
self.loop._add_writer = mock.Mock()
self.loop._add_writer._is_coroutine = False

coro = self.loop.create_connection(asyncio.Protocol, 'fe80::1%1', 80)
t, p = self.loop.run_until_complete(coro)
Expand All @@ -1359,9 +1354,7 @@ def test_create_connection_service_name(self, m_socket):
sock = m_socket.socket.return_value

self.loop._add_reader = mock.Mock()
self.loop._add_reader._is_coroutine = False
self.loop._add_writer = mock.Mock()
self.loop._add_writer._is_coroutine = False

for service, port in ('http', 80), (b'http', 80):
coro = self.loop.create_connection(asyncio.Protocol,
Expand Down Expand Up @@ -1590,7 +1583,6 @@ class Err(OSError):

m_socket.getaddrinfo.return_value = [
(2, 1, 6, '', ('127.0.0.1', 10100))]
m_socket.getaddrinfo._is_coroutine = False
m_sock = m_socket.socket.return_value = mock.Mock()
m_sock.bind.side_effect = Err

Expand All @@ -1601,7 +1593,6 @@ class Err(OSError):
@patch_socket
def test_create_datagram_endpoint_no_addrinfo(self, m_socket):
m_socket.getaddrinfo.return_value = []
m_socket.getaddrinfo._is_coroutine = False

coro = self.loop.create_datagram_endpoint(
MyDatagramProto, local_addr=('localhost', 0))
Expand Down Expand Up @@ -1835,7 +1826,6 @@ def getaddrinfo(*args, **kw):
m_socket.getaddrinfo = getaddrinfo
m_socket.socket.return_value.bind = bind = mock.Mock()
self.loop._add_reader = mock.Mock()
self.loop._add_reader._is_coroutine = False

reuseport_supported = hasattr(socket, 'SO_REUSEPORT')
coro = self.loop.create_datagram_endpoint(
Expand Down
1 change: 0 additions & 1 deletion Lib/test/test_asyncio/test_selector_events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,6 @@ def setUp(self):
def test_make_socket_transport(self):
m = mock.Mock()
self.loop.add_reader = mock.Mock()
self.loop.add_reader._is_coroutine = False
transport = self.loop._make_socket_transport(m, asyncio.Protocol())
self.assertIsInstance(transport, _SelectorSocketTransport)

Expand Down
2 changes: 0 additions & 2 deletions Lib/test/test_asyncio/test_subprocess.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,8 +50,6 @@ def setUp(self):

def create_transport(self, waiter=None):
protocol = mock.Mock()
protocol.connection_made._is_coroutine = False
protocol.process_exited._is_coroutine = False
transport = TestSubprocessTransport(
self.loop, protocol, ['test'], False,
None, None, None, 0, waiter=waiter)
Expand Down
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