Fixes _kwargs in local sub paths (#158)

* wip fixes #156

* _from_parsed_parts

* type: ignore[misc]

* formatting

upath/implementations/local.py

@@ -63,6 +63,22 @@ def _from_parts(cls, args, *, url=None, **kw):
         obj._url = SplitResult("", "", str(obj), "", "")
         return obj
 
+    @classmethod
+    def _from_parsed_parts(
+        cls,
+        drv,
+        root,
+        parts,
+        url=None,
+        **kwargs: Any,
+    ):
+        obj = super(UPath, cls)._from_parsed_parts(  # type: ignore[misc]
+            drv, root, parts
+        )
+        obj._kwargs = {}
+        obj._url = SplitResult("", "", str(obj), "", "")
+        return obj
+
 
 class WindowsUPath(WindowsPath, UPath):
     __slots__ = ()
@@ -89,3 +105,19 @@ def _from_parts(cls, args, *, url=None, **kw):
         obj._kwargs = {}
         obj._url = SplitResult("", "", str(obj), "", "")
         return obj
+
+    @classmethod
+    def _from_parsed_parts(
+        cls,
+        drv,
+        root,
+        parts,
+        url=None,
+        **kwargs: Any,
+    ):
+        obj = super(UPath, cls)._from_parsed_parts(  # type: ignore[misc]
+            drv, root, parts
+        )
+        obj._kwargs = {}
+        obj._url = SplitResult("", "", str(obj), "", "")
+        return obj

upath/tests/test_core.py

@@ -259,6 +259,11 @@ def test_access_to_private_kwargs_and_url(urlpath):
     assert isinstance(pth._url, SplitResult)
     assert pth._url.scheme == "" or pth._url.scheme in pth.fs.protocol
     assert pth._url.path == pth.path
+    subpth = pth / "foo"
+    assert subpth._kwargs == {}
+    assert isinstance(subpth._url, SplitResult)
+    assert subpth._url.scheme == "" or subpth._url.scheme in subpth.fs.protocol
+    assert subpth._url.path == subpth.path
 
 
 def test_copy_path_append_kwargs():