fix: restrict Path.iterdir mock in test_desktop to avoid breaking jsonschema on Windows

The previous implementation patched Path.iterdir globally on the class, which
caused jsonschema_specifications to receive fake paths when it lazily loads its
schema files on Windows, resulting in FileNotFoundError.

Capture the original method and forward all non-fake paths to it so that only
iterdir calls on the mocked desktop path return the stub file list.

Author: harsh543

tests/test_examples.py

@@ -69,7 +69,16 @@ async def test_desktop(monkeypatch: pytest.MonkeyPatch):
     """Test the desktop server"""
     # Mock desktop directory listing
     mock_files = [Path("/fake/path/file1.txt"), Path("/fake/path/file2.txt")]
-    monkeypatch.setattr(Path, "iterdir", lambda self: mock_files)  # type: ignore[reportUnknownArgumentType]
+    original_iterdir = Path.iterdir
+
+    def _mock_iterdir(self: Path) -> object:
+        # Restrict the patch to our fake path so that jsonschema's lazy schema
+        # loading (which also calls Path.iterdir) is not affected on any platform.
+        if "fake" in str(self):
+            return mock_files
+        return original_iterdir(self)  # type: ignore[reportUnknownArgumentType]
+
+    monkeypatch.setattr(Path, "iterdir", _mock_iterdir)
     monkeypatch.setattr(Path, "home", lambda: Path("/fake/home"))
 
     from examples.mcpserver.desktop import mcp