Fix tests that were checking usage metrics

tests/pipeline/test_pipeline.py

@@ -10,13 +10,12 @@ from crewai.pipeline.pipeline_run_result import PipelineRunResult
 from crewai.process import Process
 from crewai.task import Task
 from crewai.tasks.task_output import TaskOutput
+from crewai.types.usage_metrics import UsageMetrics
 from pydantic import BaseModel, ValidationError
 
-DEFAULT_TOKEN_USAGE = {
-    "total_tokens": 100,
-    "prompt_tokens": 50,
-    "completion_tokens": 50,
-}
+DEFAULT_TOKEN_USAGE = UsageMetrics(
+    total_tokens=100, prompt_tokens=50, completion_tokens=50, successful_requests=3
+)
 
 
 @pytest.fixture
@@ -443,6 +442,7 @@ Options:
 - Should the final output include the accumulation of previous stages' outputs?
 """
 
+
 @pytest.mark.asyncio
 async def test_pipeline_data_accumulation(mock_crew_factory):
     crew1 = mock_crew_factory(name="Crew 1", output_json_dict={"key1": "value1"})