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Artemis-Eapil/tests/unit/mcp/test_mcp_tools.py
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# 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.
"""Unit tests for Artemis MCP Tools."""
import inspect
import shutil
import tempfile
from types import SimpleNamespace
import uuid
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
from mcp_server.tools import (
mobile_get_device_state,
mobile_inspect_trace,
mobile_manage_task,
mobile_run_task,
)
from mcp_server.utils import trace_store
@pytest.fixture
def temp_trace_env(monkeypatch):
temp_dir = tempfile.mkdtemp()
monkeypatch.setattr(trace_store, "TRACES_DIR", temp_dir)
yield temp_dir
shutil.rmtree(temp_dir, ignore_errors=True)
def test_tool_signatures():
# mobile_run_task signature check
sig_run = inspect.signature(mobile_run_task)
assert "task_desc" in sig_run.parameters
assert "conversation_id" in sig_run.parameters
assert "model" in sig_run.parameters
assert "locked_app_package" in sig_run.parameters
assert "app_path" in sig_run.parameters
assert "expected_output_desc" in sig_run.parameters
# mobile_manage_task signature check
sig_manage = inspect.signature(mobile_manage_task)
assert "action" in sig_manage.parameters
assert "trace_id" in sig_manage.parameters
assert "instruction" in sig_manage.parameters
# mobile_get_device_state signature check
sig_device = inspect.signature(mobile_get_device_state)
assert "view_type" in sig_device.parameters
# mobile_inspect_trace signature check
sig_inspect = inspect.signature(mobile_inspect_trace)
assert "action" in sig_inspect.parameters
assert "trace_id" in sig_inspect.parameters
assert "step_number" in sig_inspect.parameters
def test_mobile_run_task_invalid_model():
with pytest.raises(ValueError, match="Invalid model"):
mobile_run_task(task_desc="test", conversation_id="conv-1", model="invalid_model")
def test_mobile_run_task_reserves_and_passes_global_queue_ticket(temp_trace_env):
process = MagicMock(pid=43210)
with (
patch(
"mcp_server.tools.task_runner.DeviceExecutionLock.reserve",
return_value="queue-ticket-1",
) as reserve,
patch("mcp_server.tools.task_runner.DeviceExecutionLock.transfer_reservation") as transfer,
patch("mcp_server.tools.task_runner.subprocess.Popen", return_value=process) as popen,
):
result = mobile_run_task(
task_desc="Open Settings",
conversation_id="conv-1",
model="Flash",
)
reserve.assert_called_once()
transfer.assert_called_once_with(
"queue-ticket-1",
43210,
description="MCP task: Open Settings",
session_id=result["trace_id"],
ingress="mcp",
)
assert result["trace_id"]
assert popen.call_args.kwargs["env"]["ARTEMIS_DEVICE_QUEUE_TICKET"] == "queue-ticket-1"
assert popen.call_args.kwargs["env"]["ARTEMIS_TASK_INGRESS"] == "mcp"
status = trace_store.read_status(result["trace_id"])
assert status["queue_ticket"] == "queue-ticket-1"
def test_mobile_manage_task_unknown_trace(temp_trace_env):
res = mobile_manage_task(action="status", trace_id="non-existent-trace")
assert res["status"] == "unknown"
assert "not found" in res["message"]
def test_mobile_manage_task_status_and_stop(temp_trace_env):
trace_id = str(uuid.uuid4())
trace_store.init_trace(trace_id, "Test task", "Flash", "conv-1")
# Status check
status_res = mobile_manage_task(action="status", trace_id=trace_id)
assert status_res["trace_id"] == trace_id
assert status_res["status"] == "running"
assert status_res["model"] == "Flash"
# Stop without PID
stop_res = mobile_manage_task(action="stop", trace_id=trace_id)
assert stop_res["trace_id"] == trace_id
assert "PID" in stop_res["message"] or "Cannot stop" in stop_res["message"]
def test_mobile_manage_task_inject_instruction(temp_trace_env):
trace_id = str(uuid.uuid4())
trace_store.init_trace(trace_id, "Test task", "Pro", "conv-1")
# Missing instruction parameter
err_res = mobile_manage_task(action="inject_instruction", trace_id=trace_id)
assert "Missing required argument" in err_res["message"]
# Valid injection
ok_res = mobile_manage_task(
action="inject_instruction", trace_id=trace_id, instruction="Scroll down slowly"
)
assert "Successfully injected" in ok_res["message"]
@pytest.mark.asyncio
async def test_mobile_get_device_state_hierarchy_without_ocr():
"""XML hierarchy remains available when OCR is not configured."""
controller = MagicMock()
controller.ctx.device.device_width = 1080
controller.ctx.device.device_height = 2400
controller.get_screen_data = AsyncMock(
return_value=SimpleNamespace(
base64="ZHVtbXk=",
elements=[
{
"class": "android.widget.Button",
"text": "Start",
"bounds": "[100,500][400,600]",
}
],
width=1080,
height=2400,
)
)
with (
patch("mcp_server.tools.device_state._get_controller", return_value=controller),
patch("mcp_server.tools.device_state.is_ocr_configured", return_value=False),
patch(
"mcp_server.tools.device_state.perform_ocr", new_callable=AsyncMock
) as perform_ocr_mock,
):
result = await mobile_get_device_state(view_type="hierarchy")
assert "Start" in result
perform_ocr_mock.assert_not_awaited()
@pytest.mark.asyncio
async def test_mobile_inspect_trace_invalid_action():
res = await mobile_inspect_trace(action="invalid_action", trace_id="trace-123")
assert "error" in res
assert "not supported" in res["message"]
@pytest.mark.asyncio
async def test_mcp_server_auto_registers_tools():
"""Verify that importing mcp_server.base auto-registers all mobile tools without manual tools import."""
from mcp_server.base import mcp
tools = await mcp.list_tools()
tool_names = {t.name for t in tools}
assert {
"mobile_run_task",
"mobile_manage_task",
"mobile_get_device_state",
"mobile_inspect_trace",
}.issubset(tool_names)