Issue #8498: In socket.accept(), allow to specify 0 as a backlog value in

order to accept exactly one connection.  Patch by Daniel Evers.

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index c811ec4..3efe1bb 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -797,6 +797,13 @@ class GeneralModuleTests(unittest.TestCase):
             for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
                 self.assertRaises(TypeError, pickle.dumps, sock, protocol)
 
+    def test_listen_backlog0(self):
+        srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        srv.bind((HOST, 0))
+        # backlog = 0
+        srv.listen(0)
+        srv.close()
+
 
 @unittest.skipUnless(thread, 'Threading required for this test.')
 class BasicTCPTest(SocketConnectedTest):