[3.8] bpo-36373: Fix deprecation warnings (GH-15889) (GH-15901)

https://bugs.python.org/issue36373
(cherry picked from commit 7264e92)

Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>

Lib/asyncio/locks.py

@@ -332,7 +332,7 @@ def __init__(self, lock=None, *, loop=None):
                           DeprecationWarning, stacklevel=2)
 
         if lock is None:
-            lock = Lock(loop=self._loop)
+            lock = Lock(loop=loop)
         elif lock._loop is not self._loop:
             raise ValueError("loop argument must agree with lock")
 

Lib/asyncio/queues.py

@@ -45,7 +45,7 @@ def __init__(self, maxsize=0, *, loop=None):
         # Futures.
         self._putters = collections.deque()
         self._unfinished_tasks = 0
-        self._finished = locks.Event(loop=self._loop)
+        self._finished = locks.Event(loop=loop)
         self._finished.set()
         self._init(maxsize)
 

Lib/test/test_asyncio/test_locks.py

@@ -500,10 +500,9 @@ def test_ctor_loop(self):
             self.assertIs(cond._loop, self.loop)
 
     def test_ctor_noloop(self):
-        with self.assertWarns(DeprecationWarning):
-            asyncio.set_event_loop(self.loop)
-            cond = asyncio.Condition()
-            self.assertIs(cond._loop, self.loop)
+        asyncio.set_event_loop(self.loop)
+        cond = asyncio.Condition()
+        self.assertIs(cond._loop, self.loop)
 
     def test_wait(self):
         with self.assertWarns(DeprecationWarning):

Lib/test/test_asyncio/test_queues.py

@@ -83,8 +83,7 @@ def test_ctor_loop(self):
 
     def test_ctor_noloop(self):
         asyncio.set_event_loop(self.loop)
-        with self.assertWarns(DeprecationWarning):
-            q = asyncio.Queue()
+        q = asyncio.Queue()
         self.assertIs(q._loop, self.loop)
 
     def test_repr(self):

Lib/unittest/async_case.py

@@ -89,8 +89,9 @@ def _callMaybeAsync(self, func, /, *args, **kwargs):
         else:
             return ret
 
-    async def _asyncioLoopRunner(self):
-        queue = self._asyncioCallsQueue
+    async def _asyncioLoopRunner(self, fut):
+        self._asyncioCallsQueue = queue = asyncio.Queue()
+        fut.set_result(None)
         while True:
             query = await queue.get()
             queue.task_done()
@@ -113,8 +114,9 @@ def _setupAsyncioLoop(self):
         asyncio.set_event_loop(loop)
         loop.set_debug(True)
         self._asyncioTestLoop = loop
-        self._asyncioCallsQueue = asyncio.Queue(loop=loop)
-        self._asyncioCallsTask = loop.create_task(self._asyncioLoopRunner())
+        fut = loop.create_future()
+        self._asyncioCallsTask = loop.create_task(self._asyncioLoopRunner(fut))
+        loop.run_until_complete(fut)
 
     def _tearDownAsyncioLoop(self):
         assert self._asyncioTestLoop is not None