Add tests for setsockopt errors

python · serhiy-storchaka · Aug 5, 2025 · Jun 23, 2025 · Jun 23, 2025 · Jun 23, 2025
commit 82be24527b8f8485cd0145478ed909829b605554
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
@@ -1538,6 +1538,31 @@ def testSetSockOpt(self):
         reuse = sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR)
         self.assertFalse(reuse == 0, "failed to set reuse mode")
 
+    @unittest.skipIf(_testcapi is None, "requires _testcapi")
+    def test_setsockopt_errors(self):
+        # See issue #107546.
+        from _testcapi import INT_MAX, INT_MIN
+
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.addCleanup(sock.close)
+
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)  # No error expected.
+
+        with self.assertRaises(OverflowError):
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, INT_MAX + 1)
+
+        with self.assertRaises(OverflowError):
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, INT_MIN - 1)
+
+        with self.assertRaises(OverflowError):
+            sock.setsockopt(socket.SOL_SOCKET, INT_MAX + 1, 1)
+
+        with self.assertRaises(OverflowError):
+            sock.setsockopt(INT_MAX + 1, socket.SO_REUSEADDR, 1)
+
+        with self.assertRaises(TypeError):
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, dict())
+
     def testSendAfterClose(self):
         # testing send() after close() with timeout
         with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock: