MOTOR-1160 Test against Python 3.12 (#216)

Author: blink1073

.evergreen/config.yml

@@ -863,6 +863,10 @@ axes:
         variables:
            TOX_ENV: "tornado6-py311"
            PYTHON_BINARY: "/opt/python/3.11/bin/python3"
+      - id: "tornado6-py312"
+        variables:
+           TOX_ENV: "tornado6-py312"
+           PYTHON_BINARY: "/opt/python/3.12/bin/python3"
       - id: "tornado_git-py38"
         variables:
            TOX_ENV: "tornado_git-py38"
@@ -891,6 +895,10 @@ axes:
         variables:
            TOX_ENV: "asyncio-py311"
            PYTHON_BINARY: "/opt/python/3.11/bin/python3"
+      - id: "asyncio-py312"
+        variables:
+           TOX_ENV: "asyncio-py312"
+           PYTHON_BINARY: "/opt/python/3.12/bin/python3"
       - id: "py3-pymongo-latest"
         variables:
            TOX_ENV: "py3-pymongo-latest"
@@ -899,6 +907,10 @@ axes:
         variables:
           TOX_ENV: "synchro37"
           PYTHON_BINARY: "/opt/python/3.7/bin/python3"
+      - id: "synchro312"
+        variables:
+          TOX_ENV: "synchro312"
+          PYTHON_BINARY: "/opt/python/3.12/bin/python3"
 
   - id: tox-env-rhel7
     display_name: "Tox Env RHEL7"
@@ -982,7 +994,7 @@ buildvariants:
     # TODO: synchro needs PyMongo's updated SSL test certs,
     # which may require Motor test suite changes.
     - os: "*"
-      tox-env: ["synchro37"]
+      tox-env: ["synchro37", "synchro312"]
       ssl: "ssl"
   tasks:
      - ".rapid"
@@ -1040,7 +1052,7 @@ buildvariants:
 
 - matrix_name: "enterprise-auth"
   display_name: "Enterprise Auth-${tox-env}"
-  matrix_spec: {"tox-env": ["synchro37"], ssl: "ssl"}
+  matrix_spec: {"tox-env": ["synchro37", "synchro312"], ssl: "ssl"}
   run_on:
      - "rhel84-small"
   tasks:

setup.py

@@ -122,11 +122,15 @@ def run(self):
         runner_kwargs = dict(verbosity=2, failfast=self.failfast)
 
         if self.xunit_output:
-            runner_kwargs["output"] = self.xunit_output
-            from xmlrunner import XMLTestRunner
-
-            runner_class = XMLTestRunner
-        else:
+            try:
+                from xmlrunner import XMLTestRunner
+            except ImportError:
+                self.xunit_output = False
+            else:
+                runner_kwargs["output"] = self.xunit_output
+                runner_class = XMLTestRunner
+
+        if not self.xunit_output:
             import unittest
 
             runner_class = unittest.TextTestRunner

tox.ini

@@ -9,7 +9,7 @@ envlist =
     tornado5-{py37},
 
     # Tornado 6 supports Python 3.5+.
-    tornado6-{pypy37,py37,py38,py39,py310,py311},
+    tornado6-{pypy37,py37,py38,py39,py310,py311,py312},
 
     # Test Tornado's dev version in a few configurations.
     tornado_git-{py38},
@@ -21,13 +21,14 @@ envlist =
     py3-sphinx-doctest,
 
     # asyncio without Tornado.
-    asyncio-{py37,py38,py39,py310,py311},
+    asyncio-{py37,py38,py39,py310,py311,py312},
 
     # Test with the latest PyMongo.
     py3-pymongo-latest,
 
     # Apply PyMongo's test suite to Motor via Synchro.
     synchro37
+    synchro312
 
     # Run pre-commit on all files.
     lint
@@ -58,9 +59,11 @@ basepython =
     py39: {env:PYTHON_BINARY:python3.9}
     py310: {env:PYTHON_BINARY:python3.10}
     py311: {env:PYTHON_BINARY:python3.11}
+    py312: {env:PYTHON_BINARY:python3.12}
     pypy37: {env:PYTHON_BINARY:pypy3}
 
     synchro37: {env:PYTHON_BINARY:python3.7}
+    synchro312: {env:PYTHON_BINARY:python3.12}
 
     # Default Python 3 when we don't care about minor version.
     py3,lint,manifest: {env:PYTHON_BINARY:python3}
@@ -72,6 +75,8 @@ deps =
 
     {py37,py38,py39,py310,py311}: aiohttp
 
+    py312: setuptools
+
     sphinx: sphinx
     sphinx: aiohttp
     sphinx: tornado
@@ -81,6 +86,10 @@ deps =
     synchro37: tornado>=6,<7
     synchro37: nose
 
+    synchro312: tornado>=6,<7
+    synchro312: pynose
+    synchro312: setuptools
+
     pypy37: cryptography<3
 
 setenv =
@@ -128,6 +137,16 @@ commands =
     python3 -m pip install -e {envtmpdir}/mongo-python-driver
     python3 -m synchro.synchrotest --with-xunit --xunit-file=xunit-synchro-results -v -w {envtmpdir}/mongo-python-driver {posargs}
 
+[testenv:synchro312]
+allowlist_externals =
+    git
+setenv =
+    PYTHONPATH = {envtmpdir}/mongo-python-driver
+commands =
+    git clone --depth 1 --branch master https://github.com/mongodb/mongo-python-driver.git {envtmpdir}/mongo-python-driver
+    python3 -m pip install -e {envtmpdir}/mongo-python-driver
+    python3 -m synchro.synchrotest -v -w {envtmpdir}/mongo-python-driver {posargs}
+
 [testenv:lint]
 deps =
     pre-commit