Add new tests

src/crewai/agents/agent_builder/base_agent.py

@@ -187,7 +187,6 @@ class BaseAgent(ABC, BaseModel):
         """Get the converter class for the agent to create json/pydantic outputs."""
         pass
 
-    # TODO: HAVE LORENZE REVIEW THIS WITH OTHER AGENTS
     @abstractmethod
     def copy(self):
         """Create a copy of the agent."""

src/crewai/crew.py

@@ -423,7 +423,7 @@ class Crew(BaseModel):
 
         self._finish_execution(task_output)
 
-        token_usage = self._calculate_usage_metrics()
+        token_usage = self.calculate_usage_metrics()
 
         # type: ignore # Incompatible return value type (got "tuple[str, Any]", expected "str")
         return self._format_output(task_output, token_usage)