Method test_pyc_vs_pyo

testing/test_assertrewrite.py:1142–1166

(
        self,
        pytester: Pytester,
        monkeypatch: pytest.MonkeyPatch,
    )

    @pytest.mark.skipif('"__pypy__" in sys.modules')
    def test_pyc_vs_pyo(
        self,
        pytester: Pytester,
        monkeypatch: pytest.MonkeyPatch,
    ) -> None:
        pytester.makepyfile(
            """
            import pytest
            def test_optimized():
                "hello"
                assert test_optimized.__doc__ is None"""
        )
        p = make_numbered_dir(root=Path(pytester.path), prefix="runpytest-")
        tmp = f"--basetemp={p}"
        with monkeypatch.context() as mp:
            mp.setenv("PYTHONOPTIMIZE", "2")
            mp.delenv("PYTHONDONTWRITEBYTECODE", raising=False)
            mp.delenv("PYTHONPYCACHEPREFIX", raising=False)
            assert pytester.runpytest_subprocess(tmp).ret == 0
            tagged = "test_pyc_vs_pyo." + PYTEST_TAG
            assert tagged + ".pyo" in os.listdir("__pycache__")
        monkeypatch.delenv("PYTHONDONTWRITEBYTECODE", raising=False)
        monkeypatch.delenv("PYTHONPYCACHEPREFIX", raising=False)
        assert pytester.runpytest_subprocess(tmp).ret == 1
        assert tagged + ".pyc" in os.listdir("__pycache__")

    def test_package(self, pytester: Pytester) -> None:
        pkg = pytester.path.joinpath("pkg")