fix: Creates an InMemoryMemoryService within the EvaluationGenerator

Merge #2263 Addresses #2084 COPYBARA_INTEGRATE_REVIEW=#2263 from sjhatfield:main 8d6fca4 PiperOrigin-RevId: 792336301

Author: sjhatfield

src/google/adk/evaluation/evaluation_generator.py

@@ -24,6 +24,8 @@
 from ..agents.llm_agent import Agent
 from ..artifacts.base_artifact_service import BaseArtifactService
 from ..artifacts.in_memory_artifact_service import InMemoryArtifactService
+from ..memory.base_memory_service import BaseMemoryService
+from ..memory.in_memory_memory_service import InMemoryMemoryService
 from ..runners import Runner
 from ..sessions.base_session_service import BaseSessionService
 from ..sessions.in_memory_session_service import InMemorySessionService
@@ -142,11 +144,15 @@ async def _generate_inferences_from_root_agent(
  session_id: Optional[str] = None,
  session_service: Optional[BaseSessionService] = None,
  artifact_service: Optional[BaseArtifactService] = None,
+ memory_service: Optional[BaseMemoryService] = None,
  ) -> list[Invocation]:
  """Scrapes the root agent given the list of Invocations."""
  if not session_service:
  session_service = InMemorySessionService()
 
+ if not memory_service:
+ memory_service = InMemoryMemoryService()
+
  app_name = (
  initial_session.app_name if initial_session else "EvaluationGenerator"
  )
@@ -168,6 +174,7 @@ async def _generate_inferences_from_root_agent(
  agent=root_agent,
  artifact_service=artifact_service,
  session_service=session_service,
+ memory_service=memory_service,
  )
 
  # Reset agent state for each query