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from typing import Any
from unittest.mock import AsyncMock
import pytest
from a2a.server.tasks import TaskManager
from a2a.types import (
Artifact,
InvalidParamsError,
Message,
Part,
Role,
Task,
TaskArtifactUpdateEvent,
TaskState,
TaskStatus,
TaskStatusUpdateEvent,
TextPart,
)
from a2a.utils.errors import ServerError
MINIMAL_TASK: dict[str, Any] = {
'id': 'task-abc',
'context_id': 'session-xyz',
'status': {'state': 'submitted'},
'kind': 'task',
}
@pytest.fixture
def mock_task_store() -> AsyncMock:
"""Fixture for a mock TaskStore."""
return AsyncMock()
@pytest.fixture
def task_manager(mock_task_store: AsyncMock) -> TaskManager:
"""Fixture for a TaskManager with a mock TaskStore."""
return TaskManager(
task_id=MINIMAL_TASK['id'],
context_id=MINIMAL_TASK['context_id'],
task_store=mock_task_store,
initial_message=None,
)
@pytest.mark.parametrize('invalid_task_id', ['', 123])
def test_task_manager_invalid_task_id(
mock_task_store: AsyncMock, invalid_task_id: Any
):
"""Test that TaskManager raises ValueError for an invalid task_id."""
with pytest.raises(ValueError, match='Task ID must be a non-empty string'):
TaskManager(
task_id=invalid_task_id,
context_id='test_context',
task_store=mock_task_store,
initial_message=None,
)
@pytest.mark.asyncio
async def test_get_task_existing(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test getting an existing task."""
expected_task = Task(**MINIMAL_TASK)
mock_task_store.get.return_value = expected_task
retrieved_task = await task_manager.get_task()
assert retrieved_task == expected_task
mock_task_store.get.assert_called_once_with(MINIMAL_TASK['id'])
@pytest.mark.asyncio
async def test_get_task_nonexistent(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test getting a nonexistent task."""
mock_task_store.get.return_value = None
retrieved_task = await task_manager.get_task()
assert retrieved_task is None
mock_task_store.get.assert_called_once_with(MINIMAL_TASK['id'])
@pytest.mark.asyncio
async def test_save_task_event_new_task(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test saving a new task."""
task = Task(**MINIMAL_TASK)
await task_manager.save_task_event(task)
mock_task_store.save.assert_called_once_with(task)
@pytest.mark.asyncio
async def test_save_task_event_status_update(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test saving a status update for an existing task."""
initial_task = Task(**MINIMAL_TASK)
mock_task_store.get.return_value = initial_task
new_status = TaskStatus(
state=TaskState.working,
message=Message(
role=Role.agent,
parts=[Part(TextPart(text='content'))],
message_id='message-id',
),
)
event = TaskStatusUpdateEvent(
task_id=MINIMAL_TASK['id'],
context_id=MINIMAL_TASK['context_id'],
status=new_status,
final=False,
)
await task_manager.save_task_event(event)
updated_task = initial_task
updated_task.status = new_status
mock_task_store.save.assert_called_once_with(updated_task)
@pytest.mark.asyncio
async def test_save_task_event_artifact_update(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test saving an artifact update for an existing task."""
initial_task = Task(**MINIMAL_TASK)
mock_task_store.get.return_value = initial_task
new_artifact = Artifact(
artifact_id='artifact-id',
name='artifact1',
parts=[Part(TextPart(text='content'))],
)
event = TaskArtifactUpdateEvent(
task_id=MINIMAL_TASK['id'],
context_id=MINIMAL_TASK['context_id'],
artifact=new_artifact,
)
await task_manager.save_task_event(event)
updated_task = initial_task
updated_task.artifacts = [new_artifact]
mock_task_store.save.assert_called_once_with(updated_task)
@pytest.mark.asyncio
async def test_save_task_event_metadata_update(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test saving an updated metadata for an existing task."""
initial_task = Task(**MINIMAL_TASK)
mock_task_store.get.return_value = initial_task
new_metadata = {'meta_key_test': 'meta_value_test'}
event = TaskStatusUpdateEvent(
task_id=MINIMAL_TASK['id'],
context_id=MINIMAL_TASK['context_id'],
metadata=new_metadata,
status=TaskStatus(state=TaskState.working),
final=False,
)
await task_manager.save_task_event(event)
updated_task = mock_task_store.save.call_args.args[0]
assert updated_task.metadata == new_metadata
@pytest.mark.asyncio
async def test_ensure_task_existing(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test ensuring an existing task."""
expected_task = Task(**MINIMAL_TASK)
mock_task_store.get.return_value = expected_task
event = TaskStatusUpdateEvent(
task_id=MINIMAL_TASK['id'],
context_id=MINIMAL_TASK['context_id'],
status=TaskStatus(state=TaskState.working),
final=False,
)
retrieved_task = await task_manager.ensure_task(event)
assert retrieved_task == expected_task
mock_task_store.get.assert_called_once_with(MINIMAL_TASK['id'])
@pytest.mark.asyncio
async def test_ensure_task_nonexistent(
mock_task_store: AsyncMock,
) -> None:
"""Test ensuring a nonexistent task (creates a new one)."""
mock_task_store.get.return_value = None
task_manager_without_id = TaskManager(
task_id=None,
context_id=None,
task_store=mock_task_store,
initial_message=None,
)
event = TaskStatusUpdateEvent(
task_id='new-task',
context_id='some-context',
status=TaskStatus(state=TaskState.submitted),
final=False,
)
new_task = await task_manager_without_id.ensure_task(event)
assert new_task.id == 'new-task'
assert new_task.context_id == 'some-context'
assert new_task.status.state == TaskState.submitted
mock_task_store.save.assert_called_once_with(new_task)
assert task_manager_without_id.task_id == 'new-task'
assert task_manager_without_id.context_id == 'some-context'
def test_init_task_obj(task_manager: TaskManager) -> None:
"""Test initializing a new task object."""
new_task = task_manager._init_task_obj('new-task', 'new-context') # type: ignore
assert new_task.id == 'new-task'
assert new_task.context_id == 'new-context'
assert new_task.status.state == TaskState.submitted
assert new_task.history == []
@pytest.mark.asyncio
async def test_save_task(
task_manager: TaskManager, mock_task_store: AsyncMock
) -> None:
"""Test saving a task."""
task = Task(**MINIMAL_TASK)
await task_manager._save_task(task) # type: ignore
mock_task_store.save.assert_called_once_with(task)
@pytest.mark.asyncio
async def test_save_task_event_mismatched_id_raises_error(
task_manager: TaskManager,
) -> None:
"""Test that save_task_event raises ServerError on task ID mismatch."""
# The task_manager is initialized with 'task-abc'
mismatched_task = Task(
id='wrong-id',
context_id='session-xyz',
status=TaskStatus(state=TaskState.submitted),
)
with pytest.raises(ServerError) as exc_info:
await task_manager.save_task_event(mismatched_task)
assert isinstance(exc_info.value.error, InvalidParamsError)
@pytest.mark.asyncio
async def test_save_task_event_new_task_no_task_id(
mock_task_store: AsyncMock,
) -> None:
"""Test saving a task event without task id in TaskManager."""
task_manager_without_id = TaskManager(
task_id=None,
context_id=None,
task_store=mock_task_store,
initial_message=None,
)
task_data: dict[str, Any] = {
'id': 'new-task-id',
'context_id': 'some-context',
'status': {'state': 'working'},
'kind': 'task',
}
task = Task(**task_data)
await task_manager_without_id.save_task_event(task)
mock_task_store.save.assert_called_once_with(task)
assert task_manager_without_id.task_id == 'new-task-id'
assert task_manager_without_id.context_id == 'some-context'
# initial submit should be updated to working
assert task.status.state == TaskState.working
@pytest.mark.asyncio
async def test_get_task_no_task_id(
mock_task_store: AsyncMock,
) -> None:
"""Test getting a task when task_id is not set in TaskManager."""
task_manager_without_id = TaskManager(
task_id=None,
context_id='some-context',
task_store=mock_task_store,
initial_message=None,
)
retrieved_task = await task_manager_without_id.get_task()
assert retrieved_task is None
mock_task_store.get.assert_not_called()
@pytest.mark.asyncio
async def test_save_task_event_no_task_existing(
mock_task_store: AsyncMock,
) -> None:
"""Test saving an event when no task exists and task_id is not set."""
task_manager_without_id = TaskManager(
task_id=None,
context_id=None,
task_store=mock_task_store,
initial_message=None,
)
mock_task_store.get.return_value = None
event = TaskStatusUpdateEvent(
task_id='event-task-id',
context_id='some-context',
status=TaskStatus(state=TaskState.completed),
final=True,
)
await task_manager_without_id.save_task_event(event)
# Check if a new task was created and saved
call_args = mock_task_store.save.call_args
assert call_args is not None
saved_task = call_args[0][0]
assert saved_task.id == 'event-task-id'
assert saved_task.context_id == 'some-context'
assert saved_task.status.state == TaskState.completed
assert task_manager_without_id.task_id == 'event-task-id'
assert task_manager_without_id.context_id == 'some-context'