Function test_disable_plugin_autoload

testing/test_config.py:1624–1702

(
    pytester: Pytester,
    monkeypatch: MonkeyPatch,
    enable_plugin_method: str,
    disable_plugin_method: str,
)

@pytest.mark.parametrize("disable_plugin_method", ["env_var", "flag", ""])
@pytest.mark.parametrize("enable_plugin_method", ["env_var", "flag", ""])
def test_disable_plugin_autoload(
    pytester: Pytester,
    monkeypatch: MonkeyPatch,
    enable_plugin_method: str,
    disable_plugin_method: str,
) -> None:
    class DummyEntryPoint:
        project_name = name = "mytestplugin"
        group = "pytest11"
        version = "1.0"

        def load(self):
            return sys.modules[self.name]

    class Distribution:
        metadata = {"name": "foo"}
        entry_points = (DummyEntryPoint(),)
        files = ()

    class PseudoPlugin:
        x = 42

        attrs_used = []

        def __getattr__(self, name):
            assert name in ("__loader__", "__spec__")
            self.attrs_used.append(name)
            return object()

    def distributions():
        return (Distribution(),)

    parse_args: list[str] = []

    if disable_plugin_method == "env_var":
        monkeypatch.setenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD", "1")
    elif disable_plugin_method == "flag":
        monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD")
        parse_args.append("--disable-plugin-autoload")
    else:
        assert disable_plugin_method == ""
        monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD")

    if enable_plugin_method == "env_var":
        monkeypatch.setenv("PYTEST_PLUGINS", "mytestplugin")
    elif enable_plugin_method == "flag":
        parse_args.extend(["-p", "mytestplugin"])
    else:
        assert enable_plugin_method == ""

    monkeypatch.setattr(importlib.metadata, "distributions", distributions)
    monkeypatch.setitem(sys.modules, "mytestplugin", PseudoPlugin())
    config = pytester.parseconfig(*parse_args)

    has_loaded = config.pluginmanager.get_plugin("mytestplugin") is not None
    # it should load if it's enabled, or we haven't disabled autoloading
    assert has_loaded == (bool(enable_plugin_method) or not disable_plugin_method)