adk-python/tests/unittests/agents/test_parallel_agent.py
Shangjie Chen 5b3204c356 feat! Update session service interface to be async.
Also keep the sync version in the InMemorySessionService as create_session_sync() as a temporary migration option.

PiperOrigin-RevId: 759224250
2025-05-15 11:17:13 -07:00

93 lines
2.9 KiB
Python

# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for the ParallelAgent."""
import asyncio
from typing import AsyncGenerator
from google.adk.agents.base_agent import BaseAgent
from google.adk.agents.invocation_context import InvocationContext
from google.adk.agents.parallel_agent import ParallelAgent
from google.adk.events import Event
from google.adk.sessions.in_memory_session_service import InMemorySessionService
from google.genai import types
import pytest
from typing_extensions import override
class _TestingAgent(BaseAgent):
delay: float = 0
"""The delay before the agent generates an event."""
@override
async def _run_async_impl(
self, ctx: InvocationContext
) -> AsyncGenerator[Event, None]:
await asyncio.sleep(self.delay)
yield Event(
author=self.name,
branch=ctx.branch,
invocation_id=ctx.invocation_id,
content=types.Content(
parts=[types.Part(text=f'Hello, async {self.name}!')]
),
)
async def _create_parent_invocation_context(
test_name: str, agent: BaseAgent
) -> InvocationContext:
session_service = InMemorySessionService()
session = await session_service.create_session(
app_name='test_app', user_id='test_user'
)
return InvocationContext(
invocation_id=f'{test_name}_invocation_id',
agent=agent,
session=session,
session_service=session_service,
)
@pytest.mark.asyncio
async def test_run_async(request: pytest.FixtureRequest):
agent1 = _TestingAgent(
name=f'{request.function.__name__}_test_agent_1',
delay=0.5,
)
agent2 = _TestingAgent(name=f'{request.function.__name__}_test_agent_2')
parallel_agent = ParallelAgent(
name=f'{request.function.__name__}_test_parallel_agent',
sub_agents=[
agent1,
agent2,
],
)
parent_ctx = await _create_parent_invocation_context(
request.function.__name__, parallel_agent
)
events = [e async for e in parallel_agent.run_async(parent_ctx)]
assert len(events) == 2
# agent2 generates an event first, then agent1. Because they run in parallel
# and agent1 has a delay.
assert events[0].author == agent2.name
assert events[1].author == agent1.name
assert events[0].branch.endswith(agent2.name)
assert events[1].branch.endswith(agent1.name)
assert events[0].content.parts[0].text == f'Hello, async {agent2.name}!'
assert events[1].content.parts[0].text == f'Hello, async {agent1.name}!'