Do not duplicate nox.Session interface in type stubs (#391)

* Do not duplicate nox.Session interface in type stubs

* mypy: Ignore [attr-defined] for private attribute access in test

src/nox_poetry/sessions.pyi

@@ -26,45 +26,13 @@ class _PoetrySession:
     def export_requirements(self) -> Path: ...
     def build_package(self, *, distribution_format: str = ...) -> str: ...
 
-class Session:
-    poetry: _PoetrySession
-    _session: nox.Session
-    _runner: nox.sessions.SessionRunner
+class Session(nox.Session):
     def __init__(self, session: nox.Session) -> None: ...
-    def install(self, *args: str, **kwargs: Any) -> None: ...
-    @property
-    def env(self) -> Dict[str, str]: ...
-    @property
-    def posargs(self) -> List[str]: ...
-    @property
-    def virtualenv(self) -> nox.virtualenv.ProcessEnv: ...
-    @property
-    def python(self) -> Python: ...
-    @property
-    def bin_paths(self) -> Optional[List[str]]: ...
-    @property
-    def bin(self) -> Optional[str]: ...
-    def create_tmp(self) -> str: ...
-    @property
-    def interactive(self) -> bool: ...
-    def chdir(self, dir: str) -> None: ...
-    def cd(self, dir: str) -> None: ...
-    def run(
-        self, *args: str, env: Optional[Mapping[str, str]] = ..., **kwargs: Any
-    ) -> Optional[Any]: ...
-    def run_always(
-        self, *args: str, env: Optional[Mapping[str, str]] = ..., **kwargs: Any
-    ) -> Optional[Any]: ...
-    def conda_install(
-        self, *args: str, auto_offline: bool = ..., **kwargs: Any
-    ) -> None: ...
-    def notify(self, target: Union[str, nox.sessions.SessionRunner]) -> None: ...
-    def log(self, *args: Any, **kwargs: Any) -> None: ...
-    def error(self, *args: Any) -> NoReturn: ...
-    def skip(self, *args: Any) -> NoReturn: ...
+    poetry: _PoetrySession
 
 SessionFunction = Callable[..., None]
 SessionDecorator = Callable[[SessionFunction], SessionFunction]
+
 @overload
 def session(__func: SessionFunction) -> SessionFunction: ...
 @overload

tests/unit/test_sessions.py

@@ -87,7 +87,7 @@ def tests(proxy: nox_poetry.Session) -> None:
 
     [proxy] = calls
 
-    assert proxy._session is session
+    assert proxy._session is session  # type: ignore[attr-defined]
 
 
 def test_wrapper_parametrize(session: nox.Session) -> None: