Stop testing 3.7, add 3.11

This removes our reliance on asynctest and reduces the maintenance
burden slightly.  We still support 3.7, just removing explicit testing
of it.

.github/workflows/run-tests.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9, 3.11]
     steps:
       - uses: actions/checkout@v2
       - name: Install python ${{ matrix.python-version }}

CHANGELOG.rst

@@ -1,6 +1,7 @@
 Next
 ----
 - Removed debug-level logging of processing metric
+- Stop testing Python 3.7
 
 :tag:`1.0.0 <0.1.0...1.0.0>` (20-Jul-2021)
 ------------------------------------------

setup.cfg

@@ -23,6 +23,7 @@ classifiers =
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Topic :: Communications
     Topic :: Internet
     Topic :: Software Development
@@ -36,7 +37,6 @@ install_requires =
 tornado =
     tornado>=5
 dev =
-    asynctest==0.13.0
     coverage==5.5
     flake8==3.9.2
     flake8-import-order==0.18.1

tests/test_processor.py

@@ -6,23 +6,16 @@ import time
 import typing
 import unittest.mock
 
-import asynctest
-
 from sprockets_statsd import statsd
 from tests import helpers
 
 
-class ProcessorTestCase(asynctest.TestCase):
+class ProcessorTestCase(unittest.IsolatedAsyncioTestCase):
     ip_protocol: int
 
-    async def setUp(self):
+    def setUp(self):
         self.test_timeout = 5.0
         super().setUp()
-        await self.asyncSetUp()
-
-    async def tearDown(self):
-        await self.asyncTearDown()
-        super().tearDown()
 
     async def wait_for(self, fut):
         try:
@@ -31,6 +24,7 @@ class ProcessorTestCase(asynctest.TestCase):
             self.fail('future took too long to resolve')
 
     async def asyncSetUp(self):
+        await super().asyncSetUp()
         self.statsd_server = helpers.StatsdServer(self.ip_protocol)
         self.statsd_task = asyncio.create_task(self.statsd_server.run())
         await self.statsd_server.wait_running()
@@ -38,6 +32,7 @@ class ProcessorTestCase(asynctest.TestCase):
     async def asyncTearDown(self):
         self.statsd_server.close()
         await self.statsd_server.wait_closed()
+        await super().asyncTearDown()
 
 
 class ProcessorTests(ProcessorTestCase):

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = lint,distcheck,py37,py38,py39,tornado5
+envlist = lint,distcheck,py38,py39,py311,tornado5
 toxworkdir = ./build/tox
 
 [testenv]