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chore: import upstream snapshot with attribution
2026-07-13 13:25:13 +08:00

750 lines
24 KiB
Python

# Copyright 2026 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.
"""End-to-end client-server integration tests for a2a-sdk 1.x."""
from __future__ import annotations
from google.adk.a2a import _compat
from google.adk.a2a.executor.config import A2aAgentExecutorConfig
from google.adk.a2a.executor.interceptors.include_artifacts_in_a2a_event import include_artifacts_in_a2a_event_interceptor
from google.adk.agents.remote_a2a_agent import A2A_METADATA_PREFIX
from google.adk.events.event import Event
from google.adk.events.event_actions import EventActions
from google.adk.platform import uuid as platform_uuid
from google.adk.runners import Runner
from google.adk.sessions.in_memory_session_service import InMemorySessionService
from google.genai import types
import pytest
pytestmark = pytest.mark.skipif(
not _compat.IS_A2A_V1,
reason="1.x-only client-server tests (0.3.x covered by test_client_server)",
)
from .client import create_a2a_client
from .client import create_client
from .server import agent_card
from .server import create_server_app_v1
# -----------------------------------------------------------------------------
# Mock server-side agents
# -----------------------------------------------------------------------------
def _streaming_run_async(received_requests: list):
"""A mock run_async that streams partial chunks (text + artifact) then final."""
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
content=types.Content(parts=[types.Part(text="Hello")]),
partial=True,
)
yield Event(
author="FakeAgent",
content=types.Content(parts=[types.Part(text=" world")]),
partial=True,
)
yield Event(
author="FakeAgent",
partial=True,
actions=EventActions(artifact_delta={"file1": 1}),
)
yield Event(
author="FakeAgent",
content=types.Content(parts=[types.Part(text="Hello world")]),
partial=False,
)
return run_async
def _non_streaming_run_async(received_requests: list):
"""A mock run_async that yields a single non-partial event."""
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
content=types.Content(parts=[types.Part(text="Hello world")]),
partial=False,
)
return run_async
def _multi_agent_run_async(received_requests: list):
"""A mock run_async that interleaves two agents' streamed chunks."""
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent1",
content=types.Content(parts=[types.Part(text="Hello")]),
partial=True,
)
yield Event(
author="FakeAgent2",
content=types.Content(parts=[types.Part(text=" Hi")]),
partial=True,
)
yield Event(
author="FakeAgent1",
content=types.Content(parts=[types.Part(text=" world")]),
partial=True,
)
yield Event(
author="FakeAgent2",
content=types.Content(parts=[types.Part(text=" human")]),
partial=True,
)
yield Event(
author="FakeAgent1",
content=types.Content(parts=[types.Part(text="Hello world")]),
partial=False,
)
yield Event(
author="FakeAgent2",
content=types.Content(parts=[types.Part(text="Hi human")]),
partial=False,
)
return run_async
def _function_call_run_async(received_requests: list):
"""A mock run_async that yields a function call + response pair."""
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
content=types.Content(
parts=[
types.Part(
function_call=types.FunctionCall(
name="get_weather",
args={"location": "San Francisco"},
id="call_1",
)
),
types.Part(
function_response=types.FunctionResponse(
name="get_weather",
response={"temperature": "22C"},
id="call_1",
)
),
],
role="model",
),
)
return run_async
def _long_running_run_async(received_requests: list):
"""A mock run_async modeling a long-running tool needing a user response."""
async def run_async(**kwargs):
received_requests.append(kwargs)
if len(received_requests) == 1:
yield Event(
author="FakeAgent",
content=types.Content(
parts=[
types.Part(
function_call=types.FunctionCall(
name="long_task", args={}, id="call_long"
)
)
],
role="model",
),
long_running_tool_ids={"call_long"},
)
yield Event(
author="FakeAgent",
content=types.Content(
parts=[
types.Part(
function_response=types.FunctionResponse(
name="long_task",
response={"status": "pending"},
id="call_long",
)
)
],
role="model",
),
)
else:
yield Event(
author="FakeAgent",
content=types.Content(
parts=[types.Part(text="Task completed well")], role="model"
),
)
return run_async
# -----------------------------------------------------------------------------
# Client driver helpers
# -----------------------------------------------------------------------------
async def _run_client(agent, *, message_text: str = "Hi"):
"""Drives the agent through a client-side Runner and collects results."""
session_service = InMemorySessionService()
await session_service.create_session(
app_name="ClientApp", user_id="test_user", session_id="test_session"
)
client_runner = Runner(
app_name="ClientApp", agent=agent, session_service=session_service
)
new_message = types.Content(
parts=[types.Part(text=message_text)], role="user"
)
texts = []
artifact_deltas = []
func_calls = []
func_responses = []
async for event in client_runner.run_async(
user_id="test_user", session_id="test_session", new_message=new_message
):
if event.content and event.content.parts:
for part in event.content.parts:
if part.text:
texts.append(part.text)
if part.function_response:
func_responses.append(part.function_response)
func_calls.extend(event.get_function_calls())
if event.actions and event.actions.artifact_delta:
artifact_deltas.append(event.actions.artifact_delta)
return {
"texts": texts,
"artifact_deltas": artifact_deltas,
"func_calls": func_calls,
"func_responses": func_responses,
}
# -----------------------------------------------------------------------------
# RemoteA2aAgent round-trip tests (streaming variants)
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_non_streaming_round_trip():
"""A non-streaming agent response round-trips to the client on 1.x."""
received_requests = []
app = create_server_app_v1(_non_streaming_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=False)
result = await _run_client(agent)
assert len(received_requests) == 1
assert received_requests[0]["session_id"] is not None
assert "Hello world" in result["texts"]
@pytest.mark.asyncio
async def test_non_streaming_adk_to_streaming_a2a():
"""A non-streaming agent response round-trips over a streaming client."""
received_requests = []
app = create_server_app_v1(_non_streaming_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
result = await _run_client(agent)
assert len(received_requests) == 1
assert "Hello world" in result["texts"]
@pytest.mark.asyncio
async def test_streaming_round_trip():
"""A streaming agent response delivers its aggregate text on 1.x."""
received_requests = []
app = create_server_app_v1(_streaming_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
result = await _run_client(agent)
assert len(received_requests) == 1
assert "Hello world" in result["texts"]
@pytest.mark.asyncio
async def test_streaming_adk_to_non_streaming_a2a():
"""A streaming agent response collapses to its final text on a non-streaming client."""
received_requests = []
app = create_server_app_v1(_streaming_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=False)
result = await _run_client(agent)
assert len(received_requests) == 1
assert "Hello world" in result["texts"]
@pytest.mark.asyncio
async def test_multiple_agents_streaming_round_trip():
"""Interleaved chunks from multiple server-side agents stream on 1.x."""
received_requests = []
app = create_server_app_v1(_multi_agent_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
result = await _run_client(agent)
assert len(received_requests) == 1
# The request reached the server and the last author's final text arrives.
assert "Hi human" in result["texts"]
@pytest.mark.asyncio
async def test_artifact_producing_agent_round_trip():
"""An agent that records an artifact delta still round-trips its content."""
received_requests = []
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
content=types.Content(parts=[types.Part(text="with artifact")]),
actions=EventActions(artifact_delta={"file1": 1}),
partial=False,
)
app = create_server_app_v1(run_async)
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
result = await _run_client(agent)
assert len(received_requests) == 1
assert "with artifact" in result["texts"]
# -----------------------------------------------------------------------------
# Function-call round trip
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_function_calls():
"""Function call + response pairs round-trip to the client on 1.x."""
received_requests = []
app = create_server_app_v1(_function_call_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app)
result = await _run_client(agent)
assert len(result["func_calls"]) == 1
assert result["func_calls"][0].name == "get_weather"
assert result["func_calls"][0].args == {"location": "San Francisco"}
assert len(result["func_responses"]) == 1
assert result["func_responses"][0].name == "get_weather"
assert result["func_responses"][0].response == {"temperature": "22C"}
# -----------------------------------------------------------------------------
# Long-running flows (multi-turn)
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_long_running_function_calls_success():
"""A long-running tool flow completes across two turns, preserving task_id."""
received_requests = []
app = create_server_app_v1(_long_running_run_async(received_requests))
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
session_service = InMemorySessionService()
await session_service.create_session(
app_name="ClientApp", user_id="test_user", session_id="test_session"
)
client_runner = Runner(
app_name="ClientApp", agent=agent, session_service=session_service
)
# Turn 1: triggers the long-running tool, surfaces it to the client.
new_message_1 = types.Content(parts=[types.Part(text="Hi")], role="user")
func_calls_1 = []
task_id_1 = ""
has_long_running_id = False
async for event in client_runner.run_async(
user_id="test_user",
session_id="test_session",
new_message=new_message_1,
):
if event.custom_metadata:
task_id_1 = event.custom_metadata.get(
A2A_METADATA_PREFIX + "task_id", task_id_1
)
if (
event.long_running_tool_ids
and "call_long" in event.long_running_tool_ids
):
has_long_running_id = True
func_calls_1.extend(event.get_function_calls())
assert has_long_running_id
assert any(c.name == "long_task" for c in func_calls_1)
# Turn 2: provide the function response; task should complete.
new_message_2 = types.Content(
parts=[
types.Part(
function_response=types.FunctionResponse(
name="long_task",
response={"result": "done"},
id="call_long",
)
)
],
role="user",
)
texts = []
task_id_2 = ""
async for event in client_runner.run_async(
user_id="test_user",
session_id="test_session",
new_message=new_message_2,
):
if event.custom_metadata:
task_id_2 = event.custom_metadata.get(
A2A_METADATA_PREFIX + "task_id", task_id_2
)
if event.content and event.content.parts:
for p in event.content.parts:
if p.text:
texts.append(p.text)
assert task_id_1 == task_id_2
assert "Task completed well" in texts
@pytest.mark.asyncio
async def test_long_running_function_calls_error():
"""A follow-up without a function response yields an INPUT_REQUIRED error."""
received_requests = []
app = create_server_app_v1(_long_running_run_async(received_requests))
async with app.router.lifespan_context(app):
a2a_client = create_a2a_client(app, streaming=False)
request_1 = _compat.make_message(
message_id=platform_uuid.new_uuid(),
role=_compat.ROLE_USER,
parts=[_compat.make_text_part("Hi")],
)
response_1_events = []
normalize = _compat.make_stream_normalizer()
async for item in _compat.send_message(a2a_client, request=request_1):
response_1_events.append(normalize(item))
assert len(response_1_events) == 1
task, update = response_1_events[0]
assert update is None
assert task.status.state == _compat.TS_INPUT_REQUIRED
extracted_task_id = task.id
assert extracted_task_id
request_2 = _compat.make_message(
message_id=platform_uuid.new_uuid(),
role=_compat.ROLE_USER,
parts=[_compat.make_text_part("Any update?")],
task_id=extracted_task_id,
context_id=task.context_id,
)
response_2_events = []
normalize = _compat.make_stream_normalizer()
async for item in _compat.send_message(a2a_client, request=request_2):
response_2_events.append(normalize(item))
assert len(response_2_events) == 1
error_task, error_update = response_2_events[0]
assert error_update is None
status_message = _compat.normalize_message(error_task.status.message)
assert status_message is not None
assert _compat.part_text(status_message.parts[0]) == (
"It was not provided a function response for the function call."
)
# -----------------------------------------------------------------------------
# Multi-turn session continuity
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_user_follow_up():
"""Two turns on the same session reuse the same server-side session id."""
received_requests = []
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
content=types.Content(
parts=[types.Part(text="Follow up response")], role="model"
),
custom_metadata={"server_state": "active"},
)
app = create_server_app_v1(run_async)
async with app.router.lifespan_context(app):
agent = create_client(app)
session_service = InMemorySessionService()
await session_service.create_session(
app_name="ClientApp", user_id="test_user", session_id="test_session"
)
client_runner = Runner(
app_name="ClientApp", agent=agent, session_service=session_service
)
new_message_1 = types.Content(
parts=[types.Part(text="Turn 1")], role="user"
)
async for _ in client_runner.run_async(
user_id="test_user",
session_id="test_session",
new_message=new_message_1,
):
pass
new_message_2 = types.Content(
parts=[types.Part(text="Turn 2")], role="user"
)
last_event = None
async for event in client_runner.run_async(
user_id="test_user",
session_id="test_session",
new_message=new_message_2,
):
last_event = event
assert len(received_requests) == 2
assert (
received_requests[1]["session_id"] == received_requests[0]["session_id"]
)
assert last_event is not None
# -----------------------------------------------------------------------------
# Artifact interceptor
# -----------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_include_artifacts_in_a2a_event():
"""The artifact interceptor surfaces recorded artifacts on the task on 1.x."""
async def run_async(**kwargs):
yield Event(
actions=EventActions(artifact_delta={"artifact1": 1, "artifact2": 1}),
author="agent",
content=types.Content(
parts=[types.Part(text="Here are the artifacts")]
),
)
config = A2aAgentExecutorConfig(
execute_interceptors=[include_artifacts_in_a2a_event_interceptor]
)
app = create_server_app_v1(run_async, config=config)
async with app.router.lifespan_context(app):
a2a_client = create_a2a_client(app, streaming=False)
request = _compat.make_message(
message_id="test_message_id",
role=_compat.ROLE_USER,
parts=[_compat.make_text_part("Hi")],
)
events = []
normalize = _compat.make_stream_normalizer()
async for item in _compat.send_message(a2a_client, request=request):
events.append(normalize(item))
assert len(events) == 1
task, update = events[0]
assert update is None
assert task.artifacts is not None
# The text part plus the two recorded artifacts.
assert len(task.artifacts) == 3
assert _compat.part_text(task.artifacts[0].parts[0]) == (
"Here are the artifacts"
)
artifact_names = {a.name for a in task.artifacts[1:]}
assert artifact_names == {"artifact1", "artifact2"}
for art in task.artifacts[1:]:
assert _compat.part_text(art.parts[0]) == "artifact content"
def _multi_artifact_streaming_run_async(received_requests: list):
"""A streaming agent that records two distinct artifacts across chunks."""
async def run_async(**kwargs):
received_requests.append(kwargs)
yield Event(
author="FakeAgent",
partial=True,
content=types.Content(parts=[types.Part(text="chunk one")]),
actions=EventActions(artifact_delta={"file1": 1}),
)
yield Event(
author="FakeAgent",
partial=True,
content=types.Content(parts=[types.Part(text="chunk two")]),
actions=EventActions(artifact_delta={"file2": 1}),
)
yield Event(
author="FakeAgent",
partial=False,
content=types.Content(parts=[types.Part(text="done")]),
)
return run_async
@pytest.mark.asyncio
async def test_streaming_artifacts_are_aggregated_into_single_task():
"""Streaming multi-artifact responses arrive aggregated as one ``task`` item."""
received_requests = []
config = A2aAgentExecutorConfig(
execute_interceptors=[include_artifacts_in_a2a_event_interceptor]
)
app = create_server_app_v1(
_multi_artifact_streaming_run_async(received_requests), config=config
)
async with app.router.lifespan_context(app):
a2a_client = create_a2a_client(app, streaming=True)
request = _compat.make_message(
message_id="test_message_id",
role=_compat.ROLE_USER,
parts=[_compat.make_text_part("Hi")],
)
events = []
normalize = _compat.make_stream_normalizer()
async for item in _compat.send_message(a2a_client, request=request):
events.append(normalize(item))
# The whole stream collapses to a single aggregated task carrier.
assert len(events) == 1
task, update = events[0]
assert update is None
assert task.artifacts is not None
# Both recorded artifacts are present (plus any text-carrying artifact).
artifact_names = {a.name for a in task.artifacts}
assert {"file1", "file2"}.issubset(artifact_names)
@pytest.mark.asyncio
async def test_streaming_artifact_run_completes_through_remote_agent():
"""A streaming multi-artifact run round-trips through RemoteA2aAgent"""
received_requests = []
config = A2aAgentExecutorConfig(
execute_interceptors=[include_artifacts_in_a2a_event_interceptor]
)
app = create_server_app_v1(
_multi_artifact_streaming_run_async(received_requests), config=config
)
async with app.router.lifespan_context(app):
agent = create_client(app, streaming=True)
result = await _run_client(agent)
assert len(received_requests) == 1
# The aggregated final response reaches the client (no mid-stream failure).
assert "done" in result["texts"]
@pytest.mark.asyncio
async def test_make_stream_normalizer_aggregates_incremental_artifacts():
"""The stateful normalizer accumulates artifacts across incremental updates."""
from a2a.types import a2a_pb2 as pb
def _artifact_update(name: str) -> pb.StreamResponse:
item = pb.StreamResponse()
item.artifact_update.task_id = "task-1"
item.artifact_update.context_id = "ctx-1"
item.artifact_update.append = False
item.artifact_update.last_chunk = True
artifact = item.artifact_update.artifact
artifact.artifact_id = name
artifact.name = name
artifact.parts.add().text = f"content-{name}"
return item
initial = pb.StreamResponse()
initial.task.id = "task-1"
initial.task.context_id = "ctx-1"
stream = [initial, _artifact_update("file1"), _artifact_update("file2")]
normalize = _compat.make_stream_normalizer()
results = [normalize(item) for item in stream]
# The running task accumulates artifacts across updates.
names_per_step = [{a.name for a in task.artifacts} for task, _ in results]
assert names_per_step[0] == set()
assert names_per_step[1] == {"file1"}
assert names_per_step[2] == {"file1", "file2"}
@pytest.mark.asyncio
async def test_make_stream_normalizer_accumulates_status_history():
"""Status update messages accumulate into task.history; status is applied.
Mirrors the 0.3.x ClientTaskManager, which appended each status message to
task.history before overwriting the task status.
"""
from a2a.types import a2a_pb2 as pb
def _status_update(text: str, state: int) -> pb.StreamResponse:
item = pb.StreamResponse()
item.status_update.task_id = "task-1"
item.status_update.context_id = "ctx-1"
item.status_update.status.state = state
item.status_update.status.message.message_id = text
item.status_update.status.message.parts.add().text = text
return item
initial = pb.StreamResponse()
initial.task.id = "task-1"
initial.task.context_id = "ctx-1"
stream = [
initial,
_status_update("working", pb.TASK_STATE_WORKING),
_status_update("done", pb.TASK_STATE_COMPLETED),
]
normalize = _compat.make_stream_normalizer()
results = [normalize(item) for item in stream]
# history accumulates one message per status update carrying a message.
history_ids_per_step = [
[m.message_id for m in task.history] for task, _ in results
]
assert history_ids_per_step[0] == []
assert history_ids_per_step[1] == ["working"]
assert history_ids_per_step[2] == ["working", "done"]
# the latest status is applied to the running task.
final_task, _ = results[2]
assert final_task.status.state == pb.TASK_STATE_COMPLETED