work around urllib3 socket leak

urllib3/urllib3#2570

Author: graingert

tests/test_server.py

@@ -1,5 +1,7 @@
-import os
 import contextlib
+import os
+import re
+import socket
 
 import pytest
 import requests
@@ -40,10 +42,22 @@ def test_server_should_be_http_1_1(httpbin):
     assert resp.startswith(b"HTTP/1.1")
 
 
-def test_dont_crash_on_certificate_problems(httpbin_secure):
-    with pytest.raises(Exception):
+def test_dont_crash_on_certificate_problems(httpbin_secure, capsys):
+    with socket.socket() as sock:
+        sock.connect((httpbin_secure.host, httpbin_secure.port))
         # this request used to hang
-        requests.get(httpbin_secure + "/get", verify=True, cert=__file__)
+        assert sock.recv(1) == b""
+
+    assert (
+        re.match(
+            r"pytest-httpbin server hit an exception serving request: .* The "
+            "handshake operation timed out\nattempting to ignore so the rest "
+            "of the tests can run\n",
+            capsys.readouterr().out,
+        )
+        is not None
+    )
+
     # and this request would never happen
     requests.get(
         httpbin_secure + "/get",