PYTHON-2128 Fix test_ssl_pem_passphrase

Author: behackett

.evergreen/run-pyopenssl-tests.sh

@@ -21,7 +21,7 @@ fi
 $PYTHON -m virtualenv pyopenssltest
 trap "deactivate; rm -rf pyopenssltest" EXIT HUP
 . pyopenssltest/bin/activate
-pip install pyopenssl>=17.2.0 service_identity>=18.1.0
+pip install pyopenssl>=17.2.0 "requests<3.0.0" service_identity>=18.1.0
 pip list
 python -c 'import sys; print(sys.version)'
 python setup.py test

test/test_ssl.py

@@ -43,7 +43,10 @@
 
 _HAVE_PYOPENSSL = False
 try:
+    # All of these must be available to use PyOpenSSL
     import OpenSSL
+    import requests
+    import service_identity
     _HAVE_PYOPENSSL = True
 except ImportError:
     pass
@@ -190,8 +193,7 @@ def test_ssl_pem_passphrase(self):
         #
         #   --sslPEMKeyFile=/path/to/pymongo/test/certificates/server.pem
         #   --sslCAFile=/path/to/pymongo/test/certificates/ca.pem
-        vi = sys.version_info
-        if vi[0] == 2 and vi < (2, 7, 9) and not _ssl.IS_PYOPENSSL:
+        if not hasattr(ssl, 'SSLContext') and not _ssl.IS_PYOPENSSL:
             self.assertRaises(
                 ConfigurationError,
                 MongoClient,