Enhance docstring and tests for cases with no path

Signed-off-by: BoazBD <boazbd@amazon.com>

python/python/glide/async_commands/server_modules/json.py

@@ -416,7 +416,7 @@ async def objlen(
         client (TGlideClient): The client to execute the command.
         key (TEncodable): The key of the JSON document.
         path (Optional[TEncodable]): Represents the path within the JSON document where the key names will be retrieved.
-            Defaults to None.
+            Defaults to None.If not provided, the root of the document is used, equivalent to setting the path to ".".
     Returns:
         Optional[Union[int, List[int]]]:
             For JSONPath (`path` starts with `$`):
@@ -427,6 +427,7 @@ async def objlen(
                 If multiple objects match the path, the length of the first object is returned.
                 If a value matching the path is not an object, an error is raised.
 
+
     Examples:
         >>> from glide import json
         >>> await json.set(client, "doc", "$", '{"a": 1.0, "b": {"a": {"x": 1, "y": 2}, "b": 2.5, "c": true}}')
@@ -436,9 +437,11 @@ async def objlen(
         >>> await json.objlen(client, "doc", ".")
             2  # Returns the number of key-value pairs for the object matching the path '.', which has 2 keys: 'a' and 'b'.
         >>> await json.objlen(client, "doc", "$.b")
-            3  # Returns the length of the object at path '$.b', which has 3 keys: 'a', 'b', and 'c'.
+            [3]  # Returns the length of the object at path '$.b', which has 3 keys: 'a', 'b', and 'c'.
         >>> await json.objlen(client, "doc", ".b")
             3  # Returns the length of the nested object at path '.b', which has 3 keys.
+        >>> await json.objlen(client, "doc")
+            2  # Returns the number of key-value pairs for the object matching the path '.', which has 2 keys: 'a' and 'b'.
     """
     args = ["JSON.OBJLEN", key]
     if path:

python/python/tests/tests_server_modules/test_json.py

@@ -304,6 +304,9 @@ async def test_json_objlen(self, glide_client: TGlideClient):
         len = await json.objlen(glide_client, key, "..b")
         assert len == 3
 
+        len = await json.objlen(glide_client, key)
+        assert len == 2
+
         # path doesn't exist
         assert await json.objlen(glide_client, key, "$.non_existing_path") == []
         with pytest.raises(RequestError):