hermes-agent/tests/acp/test_mcp_e2e.py
kshitijk4poor 66827f8947 chore: prune unused imports and duplicate import redefinitions
Remove unused imports (F401) and duplicate/shadowed import
redefinitions (F811) across the codebase using ruff's safe
autofixes. No behavioral changes -- imports only.

- ~1400 safe autofixes applied across 644 files (net -1072 lines)
- __init__.py re-exports preserved (excluded from F401 removal so
  public re-export surfaces stay intact)
- Re-exports that are imported or monkeypatched by tests but look
  unused in their defining module are kept with explicit # noqa:
  F401 (gateway/run.py load_dotenv; run_agent re-exports from
  agent.message_sanitization, agent.context_compressor,
  agent.retry_utils, agent.prompt_builder, agent.process_bootstrap,
  agent.codex_responses_adapter)
- Unsafe F841 (unused-variable) fixes deliberately skipped -- those
  can change behavior when the RHS has side effects
- ruff lints remain disabled in pyproject.toml (only PLW1514 is
  selected); this is a one-time cleanup, not a config change

Verification:
- python -m compileall: clean
- pytest --collect-only: all 27161 tests collect (zero import errors)
- core entry points import clean (run_agent, model_tools, cli,
  toolsets, hermes_state, batch_runner, gateway)
- static scan: every name any test imports directly from an edited
  module still resolves
2026-05-28 22:26:25 -07:00

362 lines
14 KiB
Python

"""End-to-end tests for ACP MCP server registration and tool-result reporting.
Exercises the full flow through the ACP server layer:
new_session(mcpServers) → MCP tools registered → prompt() →
tool_progress_callback (ToolCallStart) →
step_callback with results (ToolCallUpdate with rawOutput) →
session_update events arrive at the mock client
"""
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
import acp
from acp.schema import (
EnvVariable,
HttpHeader,
McpServerHttp,
McpServerStdio,
NewSessionResponse,
PromptResponse,
TextContentBlock,
ToolCallProgress,
ToolCallStart,
)
from acp_adapter.server import HermesACPAgent
from acp_adapter.session import SessionManager
from acp_adapter.tools import build_tool_start
# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------
@pytest.fixture()
def mock_manager():
return SessionManager(agent_factory=lambda: MagicMock(name="MockAIAgent"))
@pytest.fixture()
def acp_agent(mock_manager):
return HermesACPAgent(session_manager=mock_manager)
# ---------------------------------------------------------------------------
# E2E: MCP registration → prompt → tool events
# ---------------------------------------------------------------------------
class TestMcpRegistrationE2E:
"""Full flow: session with MCP servers → prompt with tool calls → ACP events."""
@pytest.mark.asyncio
async def test_session_with_mcp_servers_registers_tools(self, acp_agent, mock_manager):
"""new_session with mcpServers converts them to Hermes config and registers."""
servers = [
McpServerStdio(
name="test-fs",
command="/usr/bin/mcp-fs",
args=["--root", "/tmp"],
env=[EnvVariable(name="DEBUG", value="1")],
),
McpServerHttp(
name="test-api",
url="https://api.example.com/mcp",
headers=[HttpHeader(name="Authorization", value="Bearer tok123")],
),
]
registered_configs = {}
def mock_register(config_map):
registered_configs.update(config_map)
return ["mcp_test_fs_read", "mcp_test_fs_write", "mcp_test_api_search"]
fake_tools = [
{"function": {"name": "mcp_test_fs_read"}},
{"function": {"name": "mcp_test_fs_write"}},
{"function": {"name": "mcp_test_api_search"}},
{"function": {"name": "terminal"}},
]
with patch("tools.mcp_tool.register_mcp_servers", side_effect=mock_register), \
patch("model_tools.get_tool_definitions", return_value=fake_tools):
resp = await acp_agent.new_session(cwd="/tmp", mcp_servers=servers)
assert isinstance(resp, NewSessionResponse)
state = mock_manager.get_session(resp.session_id)
# Verify stdio server was converted correctly
assert "test-fs" in registered_configs
fs_cfg = registered_configs["test-fs"]
assert fs_cfg["command"] == "/usr/bin/mcp-fs"
assert fs_cfg["args"] == ["--root", "/tmp"]
assert fs_cfg["env"] == {"DEBUG": "1"}
# Verify HTTP server was converted correctly
assert "test-api" in registered_configs
api_cfg = registered_configs["test-api"]
assert api_cfg["url"] == "https://api.example.com/mcp"
assert api_cfg["headers"] == {"Authorization": "Bearer tok123"}
# Verify agent tool surface was refreshed
assert state.agent.tools == fake_tools
assert state.agent.valid_tool_names == {
"mcp_test_fs_read", "mcp_test_fs_write", "mcp_test_api_search", "terminal"
}
@pytest.mark.asyncio
async def test_prompt_with_tool_calls_emits_acp_events(self, acp_agent, mock_manager):
"""Prompt → agent fires callbacks → ACP ToolCallStart + ToolCallUpdate events."""
resp = await acp_agent.new_session(cwd="/tmp")
session_id = resp.session_id
state = mock_manager.get_session(session_id)
# Wire up a mock ACP client connection
mock_conn = MagicMock(spec=acp.Client)
mock_conn.session_update = AsyncMock()
mock_conn.request_permission = AsyncMock()
acp_agent._conn = mock_conn
def mock_run_conversation(user_message, conversation_history=None, task_id=None, **kwargs):
"""Simulate an agent turn that calls terminal, gets a result, then responds."""
agent = state.agent
# 1) Agent fires tool_progress_callback (ToolCallStart)
if agent.tool_progress_callback:
agent.tool_progress_callback(
"tool.started", "terminal", "$ echo hello", {"command": "echo hello"}
)
# 2) Agent fires step_callback with tool results (ToolCallUpdate)
if agent.step_callback:
agent.step_callback(1, [
{"name": "terminal", "result": '{"output": "hello\\n", "exit_code": 0}'}
])
return {
"final_response": "The command output 'hello'.",
"messages": [
{"role": "user", "content": user_message},
{"role": "assistant", "content": "The command output 'hello'."},
],
}
state.agent.run_conversation = mock_run_conversation
prompt = [TextContentBlock(type="text", text="run echo hello")]
resp = await acp_agent.prompt(prompt=prompt, session_id=session_id)
assert isinstance(resp, PromptResponse)
assert resp.stop_reason == "end_turn"
# Collect all session_update calls
updates = []
for call in mock_conn.session_update.call_args_list:
# session_update(session_id, update) — grab the update
update_arg = call[1].get("update") or call[0][1]
updates.append(update_arg)
# Find tool_call (start) and tool_call_update (completion) events
starts = [u for u in updates if getattr(u, "session_update", None) == "tool_call"]
completions = [u for u in updates if getattr(u, "session_update", None) == "tool_call_update"]
# Should have at least one ToolCallStart for "terminal"
assert len(starts) >= 1, f"Expected ToolCallStart, got updates: {[getattr(u, 'session_update', '?') for u in updates]}"
start_event = starts[0]
assert isinstance(start_event, ToolCallStart)
assert start_event.title.startswith("terminal:")
# Should have at least one ToolCallUpdate (completion) with rawOutput
assert len(completions) >= 1, f"Expected ToolCallUpdate, got updates: {[getattr(u, 'session_update', '?') for u in updates]}"
complete_event = completions[0]
assert isinstance(complete_event, ToolCallProgress)
assert complete_event.status == "completed"
# Completion should contain human-readable output rather than forcing raw JSON panes.
assert complete_event.content
assert "hello" in complete_event.content[0].content.text
assert complete_event.raw_output is None
def test_patch_mode_tool_start_defers_diff_to_edit_approval_prompt(self):
update = build_tool_start(
"tc-1",
"patch",
{
"mode": "patch",
"patch": "*** Begin Patch\n*** Update File: src/app.py\n@@\n-old line\n+new line\n*** Add File: src/new.py\n+hello\n*** End Patch",
},
)
assert len(update.content) == 1
assert update.content[0].type == "content"
assert "Approval prompt shows the diff" in update.content[0].content.text
@pytest.mark.asyncio
async def test_prompt_tool_results_paired_by_call_id(self, acp_agent, mock_manager):
"""The ToolCallUpdate's toolCallId must match the ToolCallStart's."""
resp = await acp_agent.new_session(cwd="/tmp")
session_id = resp.session_id
state = mock_manager.get_session(session_id)
mock_conn = MagicMock(spec=acp.Client)
mock_conn.session_update = AsyncMock()
mock_conn.request_permission = AsyncMock()
acp_agent._conn = mock_conn
def mock_run(user_message, conversation_history=None, task_id=None, **kwargs):
agent = state.agent
# Fire two tool calls
if agent.tool_progress_callback:
agent.tool_progress_callback("tool.started", "read_file", "read: /etc/hosts", {"path": "/etc/hosts"})
agent.tool_progress_callback("tool.started", "web_search", "web search: test", {"query": "test"})
if agent.step_callback:
agent.step_callback(1, [
{"name": "read_file", "result": '{"content": "127.0.0.1 localhost"}'},
{"name": "web_search", "result": '{"data": {"web": []}}'},
])
return {"final_response": "Done.", "messages": []}
state.agent.run_conversation = mock_run
prompt = [TextContentBlock(type="text", text="test")]
await acp_agent.prompt(prompt=prompt, session_id=session_id)
updates = []
for call in mock_conn.session_update.call_args_list:
update_arg = call[1].get("update") or call[0][1]
updates.append(update_arg)
starts = [u for u in updates if getattr(u, "session_update", None) == "tool_call"]
completions = [u for u in updates if getattr(u, "session_update", None) == "tool_call_update"]
assert len(starts) == 2, f"Expected 2 starts, got {len(starts)}"
assert len(completions) == 2, f"Expected 2 completions, got {len(completions)}"
# Each completion's toolCallId must match a start's toolCallId
start_ids = {s.tool_call_id for s in starts}
completion_ids = {c.tool_call_id for c in completions}
assert start_ids == completion_ids, (
f"IDs must match: starts={start_ids}, completions={completion_ids}"
)
class TestMcpSanitizationE2E:
"""Verify server names with special chars work end-to-end."""
@pytest.mark.asyncio
async def test_slashed_server_name_registers_cleanly(self, acp_agent, mock_manager):
"""Server name 'ai.exa/exa' should not crash — tools get sanitized names."""
servers = [
McpServerHttp(
name="ai.exa/exa",
url="https://exa.ai/mcp",
headers=[],
),
]
registered_configs = {}
def mock_register(config_map):
registered_configs.update(config_map)
return ["mcp_ai_exa_exa_search"]
fake_tools = [{"function": {"name": "mcp_ai_exa_exa_search"}}]
with patch("tools.mcp_tool.register_mcp_servers", side_effect=mock_register), \
patch("model_tools.get_tool_definitions", return_value=fake_tools):
resp = await acp_agent.new_session(cwd="/tmp", mcp_servers=servers)
state = mock_manager.get_session(resp.session_id)
# Raw server name preserved as config key
assert "ai.exa/exa" in registered_configs
# Agent tools refreshed with sanitized name
assert "mcp_ai_exa_exa_search" in state.agent.valid_tool_names
class TestSessionLifecycleMcpE2E:
"""Verify MCP servers are registered on all session lifecycle methods."""
@pytest.mark.asyncio
async def test_load_session_registers_mcp(self, acp_agent, mock_manager):
"""load_session re-registers MCP servers (spec says agents may not retain them)."""
# Create a session first
create_resp = await acp_agent.new_session(cwd="/tmp")
sid = create_resp.session_id
servers = [
McpServerStdio(name="srv", command="/bin/test", args=[], env=[]),
]
registered = {}
def mock_register(config_map):
registered.update(config_map)
return []
state = mock_manager.get_session(sid)
state.agent.enabled_toolsets = ["hermes-acp"]
state.agent.disabled_toolsets = None
state.agent.tools = []
state.agent.valid_tool_names = set()
with patch("tools.mcp_tool.register_mcp_servers", side_effect=mock_register), \
patch("model_tools.get_tool_definitions", return_value=[]):
await acp_agent.load_session(cwd="/tmp", session_id=sid, mcp_servers=servers)
assert "srv" in registered
@pytest.mark.asyncio
async def test_resume_session_registers_mcp(self, acp_agent, mock_manager):
"""resume_session re-registers MCP servers."""
create_resp = await acp_agent.new_session(cwd="/tmp")
sid = create_resp.session_id
servers = [
McpServerStdio(name="srv2", command="/bin/test2", args=[], env=[]),
]
registered = {}
def mock_register(config_map):
registered.update(config_map)
return []
state = mock_manager.get_session(sid)
state.agent.enabled_toolsets = ["hermes-acp"]
state.agent.disabled_toolsets = None
state.agent.tools = []
state.agent.valid_tool_names = set()
with patch("tools.mcp_tool.register_mcp_servers", side_effect=mock_register), \
patch("model_tools.get_tool_definitions", return_value=[]):
await acp_agent.resume_session(cwd="/tmp", session_id=sid, mcp_servers=servers)
assert "srv2" in registered
@pytest.mark.asyncio
async def test_fork_session_registers_mcp(self, acp_agent, mock_manager):
"""fork_session registers MCP servers on the new forked session."""
create_resp = await acp_agent.new_session(cwd="/tmp")
sid = create_resp.session_id
servers = [
McpServerHttp(name="api", url="https://api.test/mcp", headers=[]),
]
registered = {}
def mock_register(config_map):
registered.update(config_map)
return []
# Need to set up the forked session's agent too
with patch("tools.mcp_tool.register_mcp_servers", side_effect=mock_register), \
patch("model_tools.get_tool_definitions", return_value=[]):
fork_resp = await acp_agent.fork_session(
cwd="/tmp", session_id=sid, mcp_servers=servers
)
assert fork_resp.session_id != ""
assert "api" in registered