Set COVERAGE_CORE=sysmon to speed up 3.12 tests

Author: desertaxle

.github/workflows/ci.yml

@@ -66,6 +66,10 @@ jobs:
       - name: Install dependencies
         run: uv sync --upgrade-package 'redis${{ matrix.backend.redis-py-version }}'
 
+      - name: Set COVERAGE_CORE for Python 3.12
+        if: ${{ matrix.python-version == '3.12' }}
+        run: |
+          echo "COVERAGE_CORE=sysmon" >> $GITHUB_ENV
       - name: Run tests
         env:
           REDIS_VERSION: ${{ matrix.backend.redis-version }}

tests/cli/test_snapshot.py

@@ -96,7 +96,7 @@ async def test_snapshot_with_mixed_tasks(docket: Docket):
     future = datetime.now(timezone.utc) + timedelta(seconds=5)
     await docket.add(tasks.trace, when=future)("hi!")
     for _ in range(5):  # more than the concurrency allows
-        await docket.add(tasks.sleep)(4)
+        await docket.add(tasks.sleep)(2)
 
     async with Worker(docket, name="test-worker", concurrency=2) as worker:
         worker_running = asyncio.create_task(worker.run_until_finished())
@@ -187,10 +187,10 @@ async def test_snapshot_with_stats_flag_mixed_tasks(docket: Docket):
 
     # Add multiple tasks of different types
     future = datetime.now(timezone.utc) + timedelta(seconds=5)
-    await docket.add(tasks.trace, when=future, key="trace-1")("hi!")
-    await docket.add(tasks.trace, when=future, key="trace-2")("hello!")
+    await docket.add(tasks.trace, when=future)("hi!")
+    await docket.add(tasks.trace, when=future)("hello!")
     for _ in range(3):
-        await docket.add(tasks.sleep, key=f"sleep-{_}")(4)
+        await docket.add(tasks.sleep)(2)
 
     async with Worker(docket, name="test-worker", concurrency=2) as worker:
         worker_running = asyncio.create_task(worker.run_until_finished())
@@ -206,7 +206,7 @@ async def test_snapshot_with_stats_flag_mixed_tasks(docket: Docket):
         assert result.exit_code == 0, result.output
 
         # Should show the normal summary
-        assert "1 workers, 2/5 running" in result.output, result.output
+        assert "1 workers, 2/5 running" in result.output
 
         # Should show task statistics table with enhanced columns
         assert "Task Count Statistics by Function" in result.output

tests/cli/utils.py

@@ -22,6 +22,8 @@ async def run_cli(
 ) -> CliResult:
     """Run `python -m docket ...` and capture output."""
     merged_env = {**os.environ, "PYTHONUNBUFFERED": "1"} | (env or {})
+    if sys.version_info >= (3, 12) and sys.version_info < (3, 13):
+        merged_env.setdefault("COVERAGE_CORE", "sysmon")
 
     same_python = sys.executable
     has_pytest_cov = any(k.startswith("COV_CORE_") for k in merged_env)