bpo-35998: Avoid TimeoutError in test_asyncio: test_start_tls_server_1() (GH-14080)

Lib/test/test_asyncio/test_sslproto.py

@@ -494,17 +494,14 @@ class BaseStartTLS(func_tests.FunctionalTestCaseMixin):
 
     def test_start_tls_server_1(self):
         HELLO_MSG = b'1' * self.PAYLOAD_SIZE
+        ANSWER = b'answer'
 
         server_context = test_utils.simple_server_sslcontext()
         client_context = test_utils.simple_client_sslcontext()
-        if sys.platform.startswith('freebsd') or sys.platform.startswith('win'):
-            # bpo-35031: Some FreeBSD and Windows buildbots fail to run this test
-            # as the eof was not being received by the server if the payload
-            # size is not big enough. This behaviour only appears if the
-            # client is using TLS1.3.
-            client_context.options |= ssl.OP_NO_TLSv1_3
+        answer = None
 
         def client(sock, addr):
+            nonlocal answer
             sock.settimeout(self.TIMEOUT)
 
             sock.connect(addr)
@@ -513,33 +510,36 @@ class BaseStartTLS(func_tests.FunctionalTestCaseMixin):
 
             sock.start_tls(client_context)
             sock.sendall(HELLO_MSG)
-
-            sock.shutdown(socket.SHUT_RDWR)
+            answer = sock.recv_all(len(ANSWER))
             sock.close()
 
         class ServerProto(asyncio.Protocol):
-            def __init__(self, on_con, on_eof, on_con_lost):
+            def __init__(self, on_con, on_con_lost):
                 self.on_con = on_con
-                self.on_eof = on_eof
                 self.on_con_lost = on_con_lost
                 self.data = b''
+                self.transport = None
 
             def connection_made(self, tr):
+                self.transport = tr
                 self.on_con.set_result(tr)
 
+            def replace_transport(self, tr):
+                self.transport = tr
+
             def data_received(self, data):
                 self.data += data
-
-            def eof_received(self):
-                self.on_eof.set_result(1)
+                if len(self.data) >= len(HELLO_MSG):
+                    self.transport.write(ANSWER)
 
             def connection_lost(self, exc):
+                self.transport = None
                 if exc is None:
                     self.on_con_lost.set_result(None)
                 else:
                     self.on_con_lost.set_exception(exc)
 
-        async def main(proto, on_con, on_eof, on_con_lost):
+        async def main(proto, on_con, on_con_lost):
             tr = await on_con
             tr.write(HELLO_MSG)
 
@@ -550,16 +550,16 @@ class BaseStartTLS(func_tests.FunctionalTestCaseMixin):
                 server_side=True,
                 ssl_handshake_timeout=self.TIMEOUT)
 
-            await on_eof
+            proto.replace_transport(new_tr)
+
             await on_con_lost
             self.assertEqual(proto.data, HELLO_MSG)
             new_tr.close()
 
         async def run_main():
             on_con = self.loop.create_future()
-            on_eof = self.loop.create_future()
             on_con_lost = self.loop.create_future()
-            proto = ServerProto(on_con, on_eof, on_con_lost)
+            proto = ServerProto(on_con, on_con_lost)
 
             server = await self.loop.create_server(
                 lambda: proto, '127.0.0.1', 0)
@@ -568,11 +568,12 @@ class BaseStartTLS(func_tests.FunctionalTestCaseMixin):
             with self.tcp_client(lambda sock: client(sock, addr),
                                  timeout=self.TIMEOUT):
                 await asyncio.wait_for(
-                    main(proto, on_con, on_eof, on_con_lost),
+                    main(proto, on_con, on_con_lost),
                     timeout=self.TIMEOUT)
 
             server.close()
             await server.wait_closed()
+            self.assertEqual(answer, ANSWER)
 
         self.loop.run_until_complete(run_main())
 

Misc/NEWS.d/next/Tests/2019-06-14-17-05-49.bpo-35998.yX82oD.rst

@@ -0,0 +1 @@
+Avoid TimeoutError in test_asyncio: test_start_tls_server_1()