import inspect

# ...

class TestWorkdirRequire:
    def fake_site_packages(self, tmp_path, monkeypatch, dist_files):
        site_packages = tmp_path / "site-packages"
        site_packages.mkdir()
        for file, content in self.FILES.items():
            path = site_packages / file
            path.parent.mkdir(exist_ok=True, parents=True)
            path.write_text(inspect.cleandoc(content), encoding="utf-8")

        monkeypatch.setattr(sys, "path", [site_packages])
        return os.fspath(site_packages)

    FILES = {
        "pkg1_mod-1.2.3.dist-info/METADATA": """
            Metadata-Version: 2.4
            Name: pkg1.mod
            Version: 1.2.3
            """,
        "pkg2.mod-0.42.dist-info/METADATA": """
            Metadata-Version: 2.1
            Name: pkg2.mod
            Version: 0.42
            """,
        "pkg3_mod.egg-info/PKG-INFO": """
            Name: pkg3.mod
            Version: 1.2.3
            """,
        "pkg4.mod.egg-info/PKG-INFO": """
            Name: pkg4.mod
            Version: 0.42
            """,
    }

    @pytest.mark.parametrize(
        ("name", "version", "req"),
        [
            ("pkg1.mod", "1.2.3", "pkg1.mod>=1"),
            ("pkg2.mod", "0.42", "pkg2.mod>=0.4"),
            ("pkg3.mod", "1.2.3", "pkg3.mod<=2"),
            ("pkg4.mod", "0.42", "pkg4.mod>0.2,<1"),
        ],
    )
    def test_require_normalised_name(self, tmp_path, monkeypatch, name, version, req):
        # https://github.com/pypa/setuptools/issues/4853
        site_packages = self.fake_site_packages(tmp_path, monkeypatch, self.FILES)
        ws = pkg_resources.WorkingSet([site_packages])

        [dist] = ws.require(req)
        assert dist.version == version
        assert dist.project_name == name
        assert os.path.commonpath([dist.location, site_packages]) == site_packages