asyncio: sync with Tulip

* Cleanup gather(): use cancelled() method instead of using private Future
  attribute
* Fix _UnixReadPipeTransport and _UnixWritePipeTransport. Only start reading
  when connection_made() has been called.
* Issue #23333: Fix BaseSelectorEventLoop._accept_connection(). Close the
  transport on error. In debug mode, log errors using call_exception_handler()

2 files changed, 35 insertions, 31 deletions

diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index a38c90e..12af62b 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -886,13 +886,18 @@ class EventLoopTestsMixin:
         if hasattr(sslcontext_client, 'check_hostname'):
             sslcontext_client.check_hostname = True
 
+
         # no CA loaded
         f_c = self.loop.create_connection(MyProto, host, port,
                                           ssl=sslcontext_client)
-        with test_utils.disable_logger():
-            with self.assertRaisesRegex(ssl.SSLError,
-                                        'certificate verify failed '):
-                self.loop.run_until_complete(f_c)
+        with mock.patch.object(self.loop, 'call_exception_handler'):
+            with test_utils.disable_logger():
+                with self.assertRaisesRegex(ssl.SSLError,
+                                            'certificate verify failed '):
+                    self.loop.run_until_complete(f_c)
+
+            # execute the loop to log the connection error
+            test_utils.run_briefly(self.loop)
 
         # close connection
         self.assertIsNone(proto.transport)
@@ -919,15 +924,20 @@ class EventLoopTestsMixin:
         f_c = self.loop.create_unix_connection(MyProto, path,
                                                ssl=sslcontext_client,
                                                server_hostname='invalid')
-        with test_utils.disable_logger():
-            with self.assertRaisesRegex(ssl.SSLError,
-                                        'certificate verify failed '):
-                self.loop.run_until_complete(f_c)
+        with mock.patch.object(self.loop, 'call_exception_handler'):
+            with test_utils.disable_logger():
+                with self.assertRaisesRegex(ssl.SSLError,
+                                            'certificate verify failed '):
+                    self.loop.run_until_complete(f_c)
+
+            # execute the loop to log the connection error
+            test_utils.run_briefly(self.loop)
 
         # close connection
         self.assertIsNone(proto.transport)
         server.close()
 
+
     def test_legacy_create_unix_server_ssl_verify_failed(self):
         with test_utils.force_legacy_ssl_support():
             self.test_create_unix_server_ssl_verify_failed()
@@ -949,11 +959,12 @@ class EventLoopTestsMixin:
         # incorrect server_hostname
         f_c = self.loop.create_connection(MyProto, host, port,
                                           ssl=sslcontext_client)
-        with test_utils.disable_logger():
-            with self.assertRaisesRegex(
-                    ssl.CertificateError,
-                    "hostname '127.0.0.1' doesn't match 'localhost'"):
-                self.loop.run_until_complete(f_c)
+        with mock.patch.object(self.loop, 'call_exception_handler'):
+            with test_utils.disable_logger():
+                with self.assertRaisesRegex(
+                        ssl.CertificateError,
+                        "hostname '127.0.0.1' doesn't match 'localhost'"):
+                    self.loop.run_until_complete(f_c)
 
         # close connection
         proto.transport.close()
diff --git a/Lib/test/test_asyncio/test_unix_events.py b/Lib/test/test_asyncio/test_unix_events.py
index 126196d..41249ff 100644
--- a/Lib/test/test_asyncio/test_unix_events.py
+++ b/Lib/test/test_asyncio/test_unix_events.py
@@ -350,16 +350,13 @@ class UnixReadPipeTransportTests(test_utils.TestCase):
         return transport
 
     def test_ctor(self):
-        tr = self.read_pipe_transport()
-        self.loop.assert_reader(5, tr._read_ready)
-        test_utils.run_briefly(self.loop)
-        self.protocol.connection_made.assert_called_with(tr)
+        waiter = asyncio.Future(loop=self.loop)
+        tr = self.read_pipe_transport(waiter=waiter)
+        self.loop.run_until_complete(waiter)
 
-    def test_ctor_with_waiter(self):
-        fut = asyncio.Future(loop=self.loop)
-        tr = self.read_pipe_transport(waiter=fut)
-        test_utils.run_briefly(self.loop)
-        self.assertIsNone(fut.result())
+        self.protocol.connection_made.assert_called_with(tr)
+        self.loop.assert_reader(5, tr._read_ready)
+        self.assertIsNone(waiter.result())
 
     @mock.patch('os.read')
     def test__read_ready(self, m_read):
@@ -502,17 +499,13 @@ class UnixWritePipeTransportTests(test_utils.TestCase):
         return transport
 
     def test_ctor(self):
-        tr = self.write_pipe_transport()
-        self.loop.assert_reader(5, tr._read_ready)
-        test_utils.run_briefly(self.loop)
-        self.protocol.connection_made.assert_called_with(tr)
+        waiter = asyncio.Future(loop=self.loop)
+        tr = self.write_pipe_transport(waiter=waiter)
+        self.loop.run_until_complete(waiter)
 
-    def test_ctor_with_waiter(self):
-        fut = asyncio.Future(loop=self.loop)
-        tr = self.write_pipe_transport(waiter=fut)
+        self.protocol.connection_made.assert_called_with(tr)
         self.loop.assert_reader(5, tr._read_ready)
-        test_utils.run_briefly(self.loop)
-        self.assertEqual(None, fut.result())
+        self.assertEqual(None, waiter.result())
 
     def test_can_write_eof(self):
         tr = self.write_pipe_transport()