Refactor test cases for improved readability and consistency

- Adjusted function signatures in various test files to enhance clarity by aligning parameters.
- Updated patching syntax for better readability across test cases.
- Improved formatting and spacing in test assertions and mock setups.
- Ensured consistent use of async/await patterns in async test functions.
- Enhanced comments for better understanding of test intentions.

app/utils/credit_decorators.py

@@ -40,6 +40,7 @@ def requires_credits(
             return True
 
     """
+
     def decorator(func: F) -> F:
         @functools.wraps(func)
         async def wrapper(*args: Any, **kwargs: Any) -> Any:  # noqa: ANN401
@@ -70,7 +71,8 @@ def requires_credits(
 
             # Validate credits before execution
             await credit_service.validate_and_reserve_credits(
-                user_id, action_type,
+                user_id,
+                action_type,
             )
 
             # Execute the function
@@ -86,10 +88,14 @@ def requires_credits(
             finally:
                 # Deduct credits based on success
                 await credit_service.deduct_credits(
-                    user_id, action_type, success=success, metadata=metadata,
+                    user_id,
+                    action_type,
+                    success=success,
+                    metadata=metadata,
                 )
 
         return wrapper  # type: ignore[return-value]
+
     return decorator
 
 
@@ -111,6 +117,7 @@ def validate_credits_only(
         Decorated function that validates credits only
 
     """
+
     def decorator(func: F) -> F:
         @functools.wraps(func)
         async def wrapper(*args: Any, **kwargs: Any) -> Any:  # noqa: ANN401
@@ -141,6 +148,7 @@ def validate_credits_only(
             return await func(*args, **kwargs)
 
         return wrapper  # type: ignore[return-value]
+
     return decorator
 
 
@@ -173,7 +181,8 @@ class CreditManager:
     async def __aenter__(self) -> "CreditManager":
         """Enter context manager - validate credits."""
         await self.credit_service.validate_and_reserve_credits(
-            self.user_id, self.action_type,
+            self.user_id,
+            self.action_type,
         )
         self.validated = True
         return self
@@ -189,7 +198,10 @@ class CreditManager:
             # If no exception occurred, consider it successful
             success = exc_type is None and self.success
             await self.credit_service.deduct_credits(
-                self.user_id, self.action_type, success=success, metadata=self.metadata,
+                self.user_id,
+                self.action_type,
+                success=success,
+                metadata=self.metadata,
             )
 
     def mark_success(self) -> None: