test both cythonised and pure-Python

Author: P403n1x87

.github/workflows/cis.yml

@@ -36,20 +36,13 @@ jobs:
           tox
 
   tests:
-    name: Unit tests
+    name: "Unit tests (Python ${{ matrix.python-version }}, ${{ matrix.pure_python && 'pure' || 'cython' }})"
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - python-version: "3.11"
-            toxenv: py311
-          - python-version: "3.12"
-            toxenv: py312
-          - python-version: "3.13"
-            toxenv: py313
-          - python-version: "3.14"
-            toxenv: py314
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
+        pure_python: ["", "1"]
     steps:
       - uses: actions/checkout@v6
       - name: Get history and tags for SCM versioning to work
@@ -66,9 +59,9 @@ jobs:
           python -m pip install tox
       - name: Test
         env:
-          TOXENV: ${{ matrix.toxenv }}
+          BYTECODE_PURE_PYTHON: ${{ matrix.pure_python }}
         run: |
-          tox
+          tox -e py$(echo '${{ matrix.python-version }}' | tr -d .)
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v6
         if: github.event_name != 'schedule'

setup.py

@@ -29,6 +29,7 @@ def pretend_cython():
 
 
 _pure_python = os.getenv("BYTECODE_PURE_PYTHON")
+print(f"bytecode: building {'pure-Python' if _pure_python else 'Cython'} version")
 
 setup(
     name="bytecode",

tests/conftest.py

@@ -0,0 +1,9 @@
+import bytecode
+
+
+def pytest_report_header():
+    import importlib.util
+
+    spec = importlib.util.find_spec("bytecode.concrete")
+    kind = "pure-Python" if (spec and spec.origin and spec.origin.endswith(".py")) else "Cython"
+    return f"bytecode: {kind} build ({bytecode.__file__})"

tox.ini

@@ -3,6 +3,7 @@ envlist = py3, py38, py39, py310, py311, py312, py313, py314, fmt, docs
 isolated_build = true
 
 [testenv]
+passenv = BYTECODE_PURE_PYTHON
 deps=
     pytest
     pytest-cov