update tests for added socket object

Author: smeng9

tests/test_task.py

@@ -1,4 +1,5 @@
 import io
+import socket
 import unittest
 
 
@@ -804,6 +805,7 @@ def test_get_environment_values(self):
                 "SERVER_PROTOCOL",
                 "SERVER_SOFTWARE",
                 "waitress.client_disconnected",
+                "waitress.socket",
                 "wsgi.errors",
                 "wsgi.file_wrapper",
                 "wsgi.input",
@@ -960,6 +962,7 @@ class DummyChannel:
     adj = DummyAdj()
     creation_time = 0
     addr = ("127.0.0.1", 39830)
+    socket = socket.socket()
 
     def check_client_disconnected(self):
         # For now, until we have tests handling this feature