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feat: Add rewind_async to support rewinding the session to before a previous invocation
PiperOrigin-RevId: 820552460
This commit is contained in:
Shangjie Chen
committed by
Copybara-Service
Copybara-Service
parent
307896aece
commit
9dce06f9b0
@@ -0,0 +1,248 @@
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# Copyright 2025 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for runner.rewind_async."""
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from google.adk.agents.base_agent import BaseAgent
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from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService
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from google.adk.events.event import Event
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from google.adk.events.event import EventActions
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from google.adk.runners import Runner
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from google.adk.sessions.in_memory_session_service import InMemorySessionService
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from google.genai import types
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import pytest
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class TestRunnerRewind:
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"""Tests for runner.rewind_async."""
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runner: Runner
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def setup_method(self):
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"""Set up test fixtures."""
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root_agent = BaseAgent(name="test_agent")
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session_service = InMemorySessionService()
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artifact_service = InMemoryArtifactService()
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self.runner = Runner(
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app_name="test_app",
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agent=root_agent,
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session_service=session_service,
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artifact_service=artifact_service,
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)
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@pytest.mark.asyncio
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async def test_rewind_async_with_state_and_artifacts(self):
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"""Tests rewind_async rewinds state and artifacts."""
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runner = self.runner
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user_id = "test_user"
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session_id = "test_session"
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# 1. Setup session and initial artifacts
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session = await runner.session_service.create_session(
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app_name=runner.app_name, user_id=user_id, session_id=session_id
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)
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# invocation1
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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artifact=types.Part.from_text(text="f1v0"),
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)
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event1 = Event(
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invocation_id="invocation1",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event1")]),
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actions=EventActions(
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state_delta={"k1": "v1"}, artifact_delta={"f1": 0}
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),
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)
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await runner.session_service.append_event(session=session, event=event1)
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# invocation2
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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artifact=types.Part.from_text(text="f1v1"),
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)
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f2",
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artifact=types.Part.from_text(text="f2v0"),
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)
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event2 = Event(
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invocation_id="invocation2",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event2")]),
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actions=EventActions(
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state_delta={"k1": "v2", "k2": "v2"},
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artifact_delta={"f1": 1, "f2": 0},
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),
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)
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await runner.session_service.append_event(session=session, event=event2)
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# invocation3
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event3 = Event(
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invocation_id="invocation3",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event3")]),
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actions=EventActions(state_delta={"k2": "v3"}),
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)
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await runner.session_service.append_event(session=session, event=event3)
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session = await runner.session_service.get_session(
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app_name=runner.app_name, user_id=user_id, session_id=session_id
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)
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assert session.state == {"k1": "v2", "k2": "v3"}
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assert await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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) == types.Part.from_text(text="f1v1")
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assert await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f2",
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) == types.Part.from_text(text="f2v0")
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# 2. Rewind before invocation2
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await runner.rewind_async(
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user_id=user_id,
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session_id=session_id,
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rewind_before_invocation_id="invocation2",
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)
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# 3. Verify state and artifacts are rewinded
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session = await runner.session_service.get_session(
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app_name=runner.app_name, user_id=user_id, session_id=session_id
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)
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# After rewind before invocation2, only event1 state delta should apply.
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assert session.state["k1"] == "v1"
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assert not session.state["k2"]
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# f1 should be rewinded to v0
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assert await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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) == types.Part.from_text(text="f1v0")
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# f2 should not exist
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assert (
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await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f2",
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)
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is None
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)
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@pytest.mark.asyncio
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async def test_rewind_async_not_first_invocation(self):
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"""Tests rewind_async rewinds state and artifacts to invocation2."""
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runner = self.runner
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user_id = "test_user"
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session_id = "test_session"
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# 1. Setup session and initial artifacts
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session = await runner.session_service.create_session(
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app_name=runner.app_name, user_id=user_id, session_id=session_id
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)
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# invocation1
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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artifact=types.Part.from_text(text="f1v0"),
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)
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event1 = Event(
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invocation_id="invocation1",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event1")]),
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actions=EventActions(
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state_delta={"k1": "v1"}, artifact_delta={"f1": 0}
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),
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)
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await runner.session_service.append_event(session=session, event=event1)
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# invocation2
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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artifact=types.Part.from_text(text="f1v1"),
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)
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await runner.artifact_service.save_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f2",
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artifact=types.Part.from_text(text="f2v0"),
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)
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event2 = Event(
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invocation_id="invocation2",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event2")]),
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actions=EventActions(
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state_delta={"k1": "v2", "k2": "v2"},
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artifact_delta={"f1": 1, "f2": 0},
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),
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)
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await runner.session_service.append_event(session=session, event=event2)
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# invocation3
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event3 = Event(
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invocation_id="invocation3",
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author="agent",
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content=types.Content(parts=[types.Part.from_text(text="event3")]),
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actions=EventActions(state_delta={"k2": "v3"}),
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)
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await runner.session_service.append_event(session=session, event=event3)
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# 2. Rewind before invocation3
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await runner.rewind_async(
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user_id=user_id,
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session_id=session_id,
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rewind_before_invocation_id="invocation3",
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)
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# 3. Verify state and artifacts are rewinded
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session = await runner.session_service.get_session(
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app_name=runner.app_name, user_id=user_id, session_id=session_id
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)
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# After rewind before invocation3, event1 and event2 state deltas should apply.
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assert session.state == {"k1": "v2", "k2": "v2"}
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# f1 should be v1
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assert await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f1",
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) == types.Part.from_text(text="f1v1")
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# f2 should be v0
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assert await runner.artifact_service.load_artifact(
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app_name=runner.app_name,
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user_id=user_id,
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session_id=session_id,
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filename="f2",
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) == types.Part.from_text(text="f2v0")
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