agent-exec transport d746852ae50f236002975c61a064caa9/397c60bd1367

tests/test_port_alloc.py

@@ -0,0 +1,24 @@
+"""Regression for tests/_port_alloc.free_test_port."""
+import os
+import socket
+import sys
+import unittest
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from _port_alloc import free_test_port  # noqa: E402
+
+
+class FreeTestPortTests(unittest.TestCase):
+    def test_two_calls_return_distinct_bindable_ports(self):
+        first = free_test_port()
+        second = free_test_port()
+        self.assertNotEqual(first, second)
+        for port in (first, second):
+            with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as listener:
+                listener.bind(("127.0.0.1", port))
+                listener.listen(1)
+                self.assertEqual(listener.getsockname()[1], port)
+
+
+if __name__ == "__main__":
+    unittest.main()