Refactor user endpoint tests to include pagination and response structure validation

- Updated tests for listing users to validate pagination and response format.
- Changed mock return values to include total count and pagination details.
- Refactored user creation mocks for clarity and consistency.
- Enhanced assertions to check for presence of pagination fields in responses.
- Adjusted test cases for user retrieval and updates to ensure proper handling of user data.
- Improved readability by restructuring mock definitions and assertions across various test files.

tests/api/v1/test_playlist_endpoints.py

@@ -109,9 +109,15 @@ class TestPlaylistEndpoints:
 
         assert response.status_code == 200
         data = response.json()
-        assert len(data) == 2
+        assert "playlists" in data
+        assert "total" in data
+        assert "page" in data
+        assert "limit" in data
+        assert "total_pages" in data
+        assert len(data["playlists"]) == 2
+        assert data["total"] == 2
 
-        playlist_names = {p["name"] for p in data}
+        playlist_names = {p["name"] for p in data["playlists"]}
         assert "Test Playlist" in playlist_names
         assert "Main Playlist" in playlist_names