feat: expanduser no-op (#293)

* feat: expanduser no-op

* test: expanduser for pathlib paths

* chore: undo autoformatting

Author: ollie-bell

upath/core.py

@@ -1072,4 +1072,4 @@ def hardlink_to(  # type: ignore[override]
         raise NotImplementedError
 
     def expanduser(self) -> Self:
-        raise NotImplementedError
+        return self

upath/tests/cases.py

@@ -65,8 +65,7 @@ def test_exists(self, url, expected):
         assert path.exists() == expected
 
     def test_expanduser(self):
-        with pytest.raises(NotImplementedError):
-            self.path.expanduser()
+        assert self.path.expanduser() == self.path
 
     @pytest.mark.parametrize(
         "pattern",

upath/tests/test_core.py

@@ -445,3 +445,8 @@ def test_joinpath_on_protocol_mismatch(base, join):
 )
 def test_joinuri_on_protocol_mismatch(base, join):
     assert UPath(base).joinuri(UPath(join)) == UPath(join)
+
+
+def test_upath_expanduser():
+    assert UPath("~").expanduser() == UPath(os.path.expanduser("~"))
+    assert UPath("~") != UPath("~").expanduser()