Initial versions

Author: atom-andrew

.github/workflows/tox.yaml

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+name: Python package
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.10', '3.11', '3.12.0']
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install tox tox-gh-actions
+    - name: Test with tox
+      run: tox

.gitignore

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+.coverage

example.py

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+import asyncio
+import coverage
+
+
+async def run():
+    def raise_exception():
+        raise RuntimeError("This is a test exception.")
+
+    async def return_false():
+        # simply returning false here causes the incorrectly missed line to be marked as hit
+        try:
+            await asyncio.to_thread(raise_exception)
+            # raise RuntimeError("This is a test exception.")  # doing this instead will cause line below to show up
+        finally:
+            return False
+
+    # remove this conditional also fixes the problem
+    if await return_false():
+        return False
+
+    await asyncio.to_thread(print, "hello",)  # this line is incorrectly marked as missing the coverage report
+
+
+if __name__ == '__main__':
+    cov = coverage.Coverage(branch=False)
+    cov.start()
+
+    asyncio.run(run())
+
+    cov.stop()
+    cov.save()
+
+    cov.report(show_missing=True)

tox.ini

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+[tox]
+requires =
+    tox>=4
+    tox-gh-actions
+
+env_list = py{310,311,312_0}
+
+[gh-actions]
+python =
+    3.10: py310
+    3.11: py312
+    3.12.0: py312_0
+
+[testenv:py312_0]
+basepython = python3.12.0
+
+[testenv]
+description = run unit tests
+deps =
+    coverage
+commands =
+    python --version
+    python example.py