create an InMemoryMemoryService within the evaluation generator and passed it to the runner so that evaluation does not break when InMemoryMemoryService is used

Author: sjhatfield

src/google/adk/evaluation/evaluation_generator.py

@@ -24,9 +24,11 @@
 from ..agents.llm_agent import Agent
 from ..artifacts.base_artifact_service import BaseArtifactService
 from ..artifacts.in_memory_artifact_service import InMemoryArtifactService
+from ..memory import BaseMemoryService, InMemoryMemoryService
 from ..runners import Runner
 from ..sessions.base_session_service import BaseSessionService
 from ..sessions.in_memory_session_service import InMemorySessionService
+from ..memory.in_memory_memory_service import InMemoryMemoryService
 from ..sessions.session import Session
 from .eval_case import EvalCase
 from .eval_case import IntermediateData
@@ -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