bpo-32410: Improve sock_sendfile tests (#5294)

* Rename sock_sendfile test methods
* Make sock_sendfile tests more stable

Lib/test/test_asyncio/test_unix_events.py

@@ -484,8 +484,11 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.run_loop(self.loop.sock_connect(sock, (support.HOST, port)))
 
         def cleanup():
-            proto.transport.close()
-            self.run_loop(proto.wait_closed())
+            if proto.transport is not None:
+                # can be None if the task was cancelled before
+                # connection_made callback
+                proto.transport.close()
+                self.run_loop(proto.wait_closed())
 
             server.close()
             self.run_loop(server.wait_closed())
@@ -494,7 +497,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
 
         return sock, proto
 
-    def test_success(self):
+    def test_sock_sendfile_success(self):
         sock, proto = self.prepare()
         ret = self.run_loop(self.loop.sock_sendfile(sock, self.file))
         sock.close()
@@ -504,7 +507,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertEqual(proto.data, self.DATA)
         self.assertEqual(self.file.tell(), len(self.DATA))
 
-    def test_with_offset_and_count(self):
+    def test_sock_sendfile_with_offset_and_count(self):
         sock, proto = self.prepare()
         ret = self.run_loop(self.loop.sock_sendfile(sock, self.file,
                                                     1000, 2000))
@@ -515,7 +518,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertEqual(self.file.tell(), 3000)
         self.assertEqual(ret, 2000)
 
-    def test_sendfile_not_available(self):
+    def test_sock_sendfile_not_available(self):
         sock, proto = self.prepare()
         with mock.patch('asyncio.unix_events.os', spec=[]):
             with self.assertRaisesRegex(events.SendfileNotAvailableError,
@@ -524,7 +527,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
                                                               0, None))
         self.assertEqual(self.file.tell(), 0)
 
-    def test_sendfile_not_a_file(self):
+    def test_sock_sendfile_not_a_file(self):
         sock, proto = self.prepare()
         f = object()
         with self.assertRaisesRegex(events.SendfileNotAvailableError,
@@ -533,7 +536,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
                                                           0, None))
         self.assertEqual(self.file.tell(), 0)
 
-    def test_sendfile_iobuffer(self):
+    def test_sock_sendfile_iobuffer(self):
         sock, proto = self.prepare()
         f = io.BytesIO()
         with self.assertRaisesRegex(events.SendfileNotAvailableError,
@@ -542,7 +545,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
                                                           0, None))
         self.assertEqual(self.file.tell(), 0)
 
-    def test_sendfile_not_regular_file(self):
+    def test_sock_sendfile_not_regular_file(self):
         sock, proto = self.prepare()
         f = mock.Mock()
         f.fileno.return_value = -1
@@ -552,7 +555,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
                                                           0, None))
         self.assertEqual(self.file.tell(), 0)
 
-    def test_sendfile_zero_size(self):
+    def test_sock_sendfile_zero_size(self):
         sock, proto = self.prepare()
         fname = support.TESTFN + '.suffix'
         with open(fname, 'wb') as f:
@@ -568,7 +571,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertEqual(ret, 0)
         self.assertEqual(self.file.tell(), 0)
 
-    def test_mix_sendfile_and_regular_send(self):
+    def test_sock_sendfile_mix_with_regular_send(self):
         buf = b'1234567890' * 1024 * 1024  # 10 MB
         sock, proto = self.prepare()
         self.run_loop(self.loop.sock_sendall(sock, buf))
@@ -582,7 +585,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertEqual(proto.data, expected)
         self.assertEqual(self.file.tell(), len(self.DATA))
 
-    def test_cancel1(self):
+    def test_sock_sendfile_cancel1(self):
         sock, proto = self.prepare()
 
         fut = self.loop.create_future()
@@ -595,7 +598,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         with self.assertRaises(KeyError):
             self.loop._selector.get_key(sock)
 
-    def test_cancel2(self):
+    def test_sock_sendfile_cancel2(self):
         sock, proto = self.prepare()
 
         fut = self.loop.create_future()
@@ -608,7 +611,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         with self.assertRaises(KeyError):
             self.loop._selector.get_key(sock)
 
-    def test_blocking_error(self):
+    def test_sock_sendfile_blocking_error(self):
         sock, proto = self.prepare()
 
         fileno = self.file.fileno()
@@ -621,7 +624,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertIsNotNone(key)
         fut.add_done_callback.assert_called_once_with(mock.ANY)
 
-    def test_os_error_first_call(self):
+    def test_sock_sendfile_os_error_first_call(self):
         sock, proto = self.prepare()
 
         fileno = self.file.fileno()
@@ -635,7 +638,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertIsInstance(exc, events.SendfileNotAvailableError)
         self.assertEqual(0, self.file.tell())
 
-    def test_os_error_next_call(self):
+    def test_sock_sendfile_os_error_next_call(self):
         sock, proto = self.prepare()
 
         fileno = self.file.fileno()
@@ -652,7 +655,7 @@ class SelectorEventLoopUnixSockSendfileTests(test_utils.TestCase):
         self.assertIs(exc, err)
         self.assertEqual(1000, self.file.tell())
 
-    def test_exception(self):
+    def test_sock_sendfile_exception(self):
         sock, proto = self.prepare()
 
         fileno = self.file.fileno()