typing: fix errors

upath/core.py

@@ -214,6 +214,8 @@ def protocol(self) -> str:
         is backed by fsspec or '' if it's backed by stdlib pathlib. For
         both `fsspec.get_filesystem_class` returns `LocalFileSystem`.
         """
+        if self._url is None:
+            return ""
         return self._url.scheme
 
     @property

upath/implementations/cloud.py

@@ -73,6 +73,8 @@ def joinpath(self, *args):
 
     @property
     def path(self) -> str:
+        if self._url is None:
+            raise RuntimeError(str(self))
         return f"{self._url.netloc}{super()._path}"
 
 

upath/implementations/http.py

@@ -89,4 +89,6 @@ def resolve(
     @property
     def path(self) -> str:
         # http filesystems use the full url as path
+        if self._url is None:
+            raise RuntimeError(str(self))
         return urlunsplit(self._url)

upath/implementations/webdav.py

@@ -53,10 +53,14 @@ def _sub_path(self, name):
 
     @property
     def protocol(self) -> str:
+        if self._url is None:
+            raise RuntimeError(str(self))
         return self._url.scheme.split("+")[0]
 
     @property
     def storage_options(self) -> dict[str, Any]:
+        if self._url is None:
+            raise RuntimeError(str(self))
         sopts = super().storage_options
         http_protocol = self._url.scheme.split("+")[1]
         assert http_protocol in {"http", "https"}