Use the right types in {Dummy,Fake}Application

sphinx/ext/autosummary/__init__.py

@@ -57,6 +57,7 @@
 import re
 import sys
 from inspect import Parameter
+from pathlib import Path
 from types import ModuleType
 from typing import TYPE_CHECKING, Any, ClassVar, cast
 
@@ -154,10 +155,10 @@ class FakeApplication:
     verbosity = 0
 
     def __init__(self) -> None:
-        self.doctreedir = None
+        self.doctreedir = Path()
         self.events = None
         self.extensions: dict[str, Extension] = {}
-        self.srcdir = None
+        self.srcdir = Path()
         self.config = Config()
         self.project = Project('', {})
         self.registry = SphinxComponentRegistry()

sphinx/ext/autosummary/generate.py

@@ -46,6 +46,7 @@
 from sphinx.pycode import ModuleAnalyzer
 from sphinx.registry import SphinxComponentRegistry
 from sphinx.util import logging, rst
+from sphinx.util._pathlib import _StrPath
 from sphinx.util.inspect import getall, safe_getattr
 from sphinx.util.osutil import ensuredir
 from sphinx.util.template import SphinxTemplateLoader
@@ -67,7 +68,7 @@ def __init__(self, translator: NullTranslations) -> None:
         self.config = Config()
         self.registry = SphinxComponentRegistry()
         self.messagelog: list[str] = []
-        self.srcdir = '/'
+        self.srcdir = _StrPath('/')
         self.translator = translator
         self.verbosity = 0
         self._warncount = 0