PYTHON-1198 Test PyMongo v2.9 on Evergreen.

Install nose via setup_requires to produce XML test output.
Add Python 2.4, 2.5, Jython 2.5 testing.
Only run the SSL test suite when SSL is enabled.
test_ssl.py should not fail when auth_context.client does not exist.
Work around the nosetests command and verbosity flag on Python 3.

.evergreen/config.yml

@@ -307,7 +307,7 @@ functions:
         file_location: "${DRIVERS_TOOLS}/results.json"
     - command: attach.xunit_results
       params:
-        file: "src/xunit-results/TEST-*.xml"
+        file: "src/nosetests.xml"
 
   "bootstrap mongo-orchestration":
     - command: shell.exec
@@ -780,6 +780,14 @@ axes:
   - id: python-version
     display_name: "Python"
     values:
+      - id: "2.4"
+        display_name: "Python 2.4"
+        variables:
+           PYTHON_BINARY: "/opt/python/2.4/bin/python"
+      - id: "2.5"
+        display_name: "Python 2.5"
+        variables:
+           PYTHON_BINARY: "/opt/python/2.5/bin/python"
       - id: "2.6"
         display_name: "Python 2.6"
         variables:
@@ -812,6 +820,10 @@ axes:
         display_name: "PyPy 3"
         variables:
            PYTHON_BINARY: "/opt/python/pypy3/bin/pypy3"
+      - id: "jython2.5"
+        display_name: "Jython 2.5"
+        variables:
+           PYTHON_BINARY: "/opt/python/jython2.5/bin/jython"
       - id: "jython2.7"
         display_name: "Jython 2.7"
         variables:
@@ -931,7 +943,7 @@ buildvariants:
   matrix_spec: {"python-version": "*", auth: "*", ssl: "ssl" }
   exclude_spec:
     # PYTHON-498: disable Jython SSL tests
-    python-version: "jython2.7"
+    python-version: ["jython2.5", "jython2.7"]
     # EVG-1410: exlcude_spec must specifiy values for all axes
     auth: "*"
     ssl: "ssl"

.evergreen/run-tests.sh

@@ -20,11 +20,6 @@ if [ "$AUTH" != "noauth" ]; then
     export DB_PASSWORD="pwd123"
 fi
 
-if [ "$SSL" != "nossl" ]; then
-    export CLIENT_PEM="$DRIVERS_TOOLS/.evergreen/x509gen/client.pem"
-    export CA_PEM="$DRIVERS_TOOLS/.evergreen/x509gen/ca.pem"
-fi
-
 if [ -z "$PYTHON_BINARY" ]; then
     PYTHON=$(command -v python || command -v python3)
     if [ -z "$PYTHON" ]; then
@@ -35,6 +30,34 @@ else
     PYTHON="$PYTHON_BINARY"
 fi
 
+PYTHON_VERSION=$($PYTHON -c 'import sys; sys.stdout.write(str(sys.version_info[0]))')
+
+if [ "$SSL" = "ssl" ]; then
+    if [ "$PYTHON_VERSION" = "3" ]; then
+        # We cannot pass arguments to the "nosetests" command with Python 3
+        # because of the hacks in setup.py to work around nose/2to3 usage.
+        # Instead, use the "test" command directly to run only test/test_ssl.py.
+        # Unfortunately, this does not produce XML output.
+        TEST_CMD="test --test-suite test.test_ssl"
+    else
+        # With Python 2 we use the nosetests command
+        # Run only test/test_ssl.py and produces nosetests.xml output.
+        TEST_CMD="nosetests --tests test/test_ssl.py"
+    fi
+else
+    # Run all the tests and produces nosetests.xml output.
+    TEST_CMD="nosetests"
+fi
+
+# Set verbose test output flag.
+if [ "$PYTHON_VERSION" = "3" ]; then
+    # With Python 3, the tests do not accept a "--verbosity=2" flag.
+    TEST_VERBOSITY="-v"
+else
+    # With Python 2, the tests accepts a "-v" flag but only "--verbosity=2"
+    # causes the verbose output we want.
+    TEST_VERBOSITY="--verbosity=2"
+fi
 
 echo "Running $AUTH tests over $SSL with python $PYTHON, connecting to $MONGODB_URI"
 $PYTHON -c 'import sys; print(sys.version)'
@@ -43,4 +66,4 @@ $PYTHON -c 'import sys; print(sys.version)'
 # files in the xunit-results/ directory.
 
 $PYTHON setup.py clean
-$PYTHON setup.py test --xunit-output=xunit-results
+$PYTHON setup.py $TEST_CMD $TEST_VERBOSITY

setup.py

@@ -315,6 +315,19 @@ Performance may be degraded.\n
 else:
     extra_opts['ext_modules'] = ext_modules
 
+# The nosetests command requires nose be available, otherwise the xunit
+# plugin will not work.
+# Note: projects listed in setup_requires will NOT be automatically installed
+# on the system where the setup script is being run. They are simply
+# downloaded to the ./.eggs directory if they're not locally available
+# already.
+# See:
+# https://nose.readthedocs.io/en/latest/api/commands.html#bootstrapping
+# https://nose.readthedocs.io/en/latest/setuptools_integration.html
+# https://setuptools.readthedocs.io/en/latest/setuptools.html#new-and-changed-setup-keywords
+if "nosetests" in sys.argv:
+    extra_opts["setup_requires"] = ["nose"]
+
 if PY3:
     extra_opts["use_2to3"] = True
     if should_run_tests:

test/__init__.py

@@ -148,6 +148,8 @@ def setup():
 
 def teardown():
     client = auth_context.client
+    if not client:
+        return
     if auth_context.auth_enabled:
         auth_context.add_user_and_log_in()