hermes-agent/tests/agent/test_codex_app_server_event_bridge.py
Teknium ec3d958425 feat(codex): webSearch bubbles + bare hermes-tools names in app-server bridge
Two more display gaps from #26541 grafted onto the merged bridge:

- webSearch: codex's built-in web search now produces a tool.started/
  tool.completed bubble pair (query as preview + args). Previously the
  item type wasn't in _CODEX_TOOL_ITEM_TYPES, so built-in searches
  showed nothing.
- mcp.hermes-tools.* stripping: tools codex invokes through Hermes' own
  hermes-tools MCP server display as their bare names (web_search,
  browser_navigate) instead of mcp.hermes-tools.web_search. The inner
  dispatch subprocess can't fire native progress events, so the
  codex-level event is the display event — name it the way users know
  the tool.

Credit: both behaviors designed and first implemented by @simpolism in
PR #26541 (May 15, earliest of the app-server display-bridge family).
2026-07-17 06:49:47 -07:00

638 lines
24 KiB
Python

"""Regression tests for the codex_app_server → Hermes UI event bridge.
Pin the translation of codex JSON-RPC notifications into agent callbacks
(`tool_progress_callback`, `_fire_stream_delta`, `_fire_reasoning_delta`,
`_emit_interim_assistant_message`) so Discord/Telegram/TUI continue to
surface live tool-progress bubbles and interim assistant commentary when
the active provider runs on `openai_runtime: codex_app_server` (#33200).
Each test drives `make_codex_app_server_event_bridge(agent)` directly with
fixture notifications that mirror codex 0.130.0's `item/*` shape and
asserts the right agent callback fired with the right arguments. The
bridge is deliberately small (~150 lines of pure dict mapping) so the
tests can stay focused on the wire format ↔ callback contract.
"""
from __future__ import annotations
import json
from types import SimpleNamespace
from unittest.mock import MagicMock
import pytest
from agent.codex_runtime import (
_codex_item_completion_payload,
_codex_item_to_args,
_codex_item_to_preview,
_codex_item_to_tool_name,
make_codex_app_server_event_bridge,
)
def _make_stub_agent() -> SimpleNamespace:
"""Minimal stand-in for AIAgent that records every callback fire."""
return SimpleNamespace(
tool_progress_callback=MagicMock(name="tool_progress_callback"),
_fire_stream_delta=MagicMock(name="_fire_stream_delta"),
_fire_reasoning_delta=MagicMock(name="_fire_reasoning_delta"),
_emit_interim_assistant_message=MagicMock(
name="_emit_interim_assistant_message"
),
)
def _item_started(item: dict) -> dict:
return {"method": "item/started", "params": {"item": item}}
def _item_completed(item: dict) -> dict:
return {"method": "item/completed", "params": {"item": item}}
# ---------- name / args / preview / result mapping ----------
class TestCodexItemToToolName:
def test_command_execution_maps_to_exec_command(self):
assert _codex_item_to_tool_name(
{"type": "commandExecution"}
) == "exec_command"
def test_file_change_maps_to_apply_patch(self):
assert _codex_item_to_tool_name(
{"type": "fileChange"}
) == "apply_patch"
def test_mcp_tool_call_includes_server_and_tool(self):
assert _codex_item_to_tool_name(
{"type": "mcpToolCall", "server": "fs", "tool": "read_file"}
) == "mcp.fs.read_file"
def test_mcp_tool_call_falls_back_when_fields_missing(self):
assert _codex_item_to_tool_name(
{"type": "mcpToolCall"}
) == "mcp.mcp.unknown"
def test_dynamic_tool_call_uses_tool_field(self):
assert _codex_item_to_tool_name(
{"type": "dynamicToolCall", "tool": "web_search"}
) == "web_search"
def test_hermes_tools_mcp_server_emits_bare_tool_name(self):
"""The hermes-tools MCP server wraps Hermes' own tools for codex;
the inner dispatch subprocess can't fire native progress events,
so the codex-level event IS the display event — shown without the
mcp.hermes-tools.* namespacing (from #26541 by @simpolism)."""
assert _codex_item_to_tool_name(
{"type": "mcpToolCall", "server": "hermes-tools", "tool": "web_search"}
) == "web_search"
assert _codex_item_to_tool_name(
{"type": "mcpToolCall", "server": "hermes-tools", "tool": "browser_navigate"}
) == "browser_navigate"
def test_web_search_builtin_maps_to_web_search(self):
"""Codex's built-in webSearch tool gets a bubble too (#26541)."""
assert _codex_item_to_tool_name({"type": "webSearch"}) == "web_search"
def test_unknown_type_returns_type_string(self):
assert _codex_item_to_tool_name(
{"type": "plan"}
) == "plan"
def test_missing_type_returns_unknown_sentinel(self):
assert _codex_item_to_tool_name({}) == "unknown"
class TestCodexItemToArgs:
def test_command_execution_args_carry_cwd_and_command(self):
args = _codex_item_to_args({
"type": "commandExecution",
"command": "ls -la",
"cwd": "/tmp",
})
assert args == {"command": "ls -la", "cwd": "/tmp"}
def test_file_change_args_normalize_changes(self):
args = _codex_item_to_args({
"type": "fileChange",
"changes": [
{"path": "/a.py", "kind": {"type": "add"}},
{"path": "/b.py", "kind": {"type": "update"}},
"not-a-dict",
],
})
assert args == {
"changes": [
{"kind": "add", "path": "/a.py"},
{"kind": "update", "path": "/b.py"},
]
}
def test_mcp_tool_call_returns_arguments_dict(self):
args = _codex_item_to_args({
"type": "mcpToolCall", "arguments": {"q": "x"}
})
assert args == {"q": "x"}
def test_non_dict_arguments_get_wrapped(self):
args = _codex_item_to_args({
"type": "dynamicToolCall", "arguments": ["a", "b"],
})
assert args == {"arguments": ["a", "b"]}
class TestCodexItemToPreview:
def test_command_preview_truncated(self):
long_cmd = "echo " + "x" * 500
preview = _codex_item_to_preview({
"type": "commandExecution", "command": long_cmd
})
assert preview is not None
assert len(preview) <= 120
def test_file_change_preview_lists_first_three_paths(self):
preview = _codex_item_to_preview({
"type": "fileChange",
"changes": [
{"path": f"/p{i}.py", "kind": {"type": "update"}}
for i in range(5)
],
})
assert "/p0.py" in preview and "/p2.py" in preview
assert "+2 more" in preview
def test_file_change_no_paths_returns_none(self):
assert _codex_item_to_preview({
"type": "fileChange", "changes": [{}]
}) is None
def test_mcp_args_preview_is_json(self):
preview = _codex_item_to_preview({
"type": "mcpToolCall", "arguments": {"q": "hello"},
})
assert preview is not None
assert "hello" in preview
def test_empty_args_returns_none(self):
assert _codex_item_to_preview({"type": "mcpToolCall"}) is None
class TestCodexItemCompletionPayload:
def test_command_success_returns_aggregated_output(self):
result, is_error = _codex_item_completion_payload({
"type": "commandExecution",
"exitCode": 0,
"aggregatedOutput": "hello\nworld\n",
})
assert result == "hello\nworld\n"
assert is_error is False
def test_command_nonzero_exit_marks_error(self):
result, is_error = _codex_item_completion_payload({
"type": "commandExecution",
"exitCode": 2,
"aggregatedOutput": "boom",
})
assert "[exit 2]" in result
assert "boom" in result
assert is_error is True
def test_file_change_completed_status_not_error(self):
result, is_error = _codex_item_completion_payload({
"type": "fileChange",
"status": "completed",
"changes": [{"path": "/a"}],
})
assert "completed" in result
assert is_error is False
def test_mcp_tool_error_is_error(self):
result, is_error = _codex_item_completion_payload({
"type": "mcpToolCall",
"error": {"message": "nope"},
})
assert "[error]" in result
assert is_error is True
def test_dynamic_tool_failure_is_error(self):
result, is_error = _codex_item_completion_payload({
"type": "dynamicToolCall",
"success": False,
})
assert "False" in result
assert is_error is True
# ---------- bridge: dispatch contracts ----------
class TestStreamDeltaDispatch:
def test_agent_message_delta_fires_stream_delta(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge({"method": "item/agentMessage/delta",
"params": {"delta": "hello "}})
bridge({"method": "item/agentMessage/delta",
"params": {"delta": "world"}})
assert agent._fire_stream_delta.call_count == 2
assert agent._fire_stream_delta.call_args_list[0].args == ("hello ",)
assert agent._fire_stream_delta.call_args_list[1].args == ("world",)
def test_empty_delta_is_skipped(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge({"method": "item/agentMessage/delta", "params": {"delta": ""}})
bridge({"method": "item/agentMessage/delta", "params": {}})
agent._fire_stream_delta.assert_not_called()
def test_text_field_used_when_delta_missing(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge({"method": "item/agentMessage/delta",
"params": {"text": "fallback"}})
agent._fire_stream_delta.assert_called_once_with("fallback")
def test_reasoning_delta_fires_reasoning_callback(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge({"method": "item/reasoning/delta",
"params": {"delta": "thinking..."}})
agent._fire_reasoning_delta.assert_called_once_with("thinking...")
agent._fire_stream_delta.assert_not_called()
class TestToolProgressDispatch:
def test_command_started_fires_tool_started(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "commandExecution",
"id": "exec-1",
"command": "ls /tmp",
"cwd": "/tmp",
}))
agent.tool_progress_callback.assert_called_once()
call = agent.tool_progress_callback.call_args
assert call.args[0] == "tool.started"
assert call.args[1] == "exec_command"
assert "ls /tmp" in call.args[2] # preview
assert call.args[3] == {"command": "ls /tmp", "cwd": "/tmp"}
def test_command_completed_fires_tool_completed_with_result(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "commandExecution",
"id": "exec-2",
"command": "echo hi",
"cwd": "/tmp",
}))
bridge(_item_completed({
"type": "commandExecution",
"id": "exec-2",
"exitCode": 0,
"aggregatedOutput": "hi\n",
"durationMs": 42,
}))
# tool.started then tool.completed
assert agent.tool_progress_callback.call_count == 2
completed = agent.tool_progress_callback.call_args_list[1]
assert completed.args[0] == "tool.completed"
assert completed.args[1] == "exec_command"
assert completed.args[2] is None # preview unused on completion
assert completed.args[3] is None # args unused on completion
assert completed.kwargs["duration"] == pytest.approx(0.042)
assert completed.kwargs["is_error"] is False
assert completed.kwargs["result"] == "hi\n"
def test_nonzero_exit_marks_completion_error(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_completed({
"type": "commandExecution",
"id": "exec-3",
"exitCode": 127,
"aggregatedOutput": "not found",
}))
call = agent.tool_progress_callback.call_args
assert call.args[0] == "tool.completed"
assert call.kwargs["is_error"] is True
assert "[exit 127]" in call.kwargs["result"]
def test_apply_patch_started_and_completed(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "fileChange",
"id": "fc-1",
"changes": [
{"path": "/a.py", "kind": {"type": "add"}},
{"path": "/b.py", "kind": {"type": "update"}},
],
}))
bridge(_item_completed({
"type": "fileChange",
"id": "fc-1",
"status": "completed",
"changes": [{"path": "/a.py"}, {"path": "/b.py"}],
}))
names = [
c.args[1] for c in agent.tool_progress_callback.call_args_list
]
assert names == ["apply_patch", "apply_patch"]
completed = agent.tool_progress_callback.call_args_list[1]
assert completed.kwargs["is_error"] is False
assert "2 change(s)" in completed.kwargs["result"]
def test_mcp_tool_uses_namespaced_tool_name(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "mcpToolCall",
"id": "mcp-1",
"server": "fs",
"tool": "list_dir",
"arguments": {"path": "/tmp"},
}))
call = agent.tool_progress_callback.call_args
assert call.args[1] == "mcp.fs.list_dir"
# Preview should be a json render of the args
assert "/tmp" in call.args[2]
def test_dynamic_tool_uses_tool_field_as_name(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "dynamicToolCall",
"id": "dyn-1",
"tool": "web_search",
"arguments": {"query": "hermes"},
}))
bridge(_item_completed({
"type": "dynamicToolCall",
"id": "dyn-1",
"tool": "web_search",
"success": True,
"contentItems": [{"text": "results"}],
}))
names = [
c.args[1] for c in agent.tool_progress_callback.call_args_list
]
assert names == ["web_search", "web_search"]
completed = agent.tool_progress_callback.call_args_list[1]
assert completed.kwargs["is_error"] is False
assert "results" in completed.kwargs["result"]
def test_web_search_builtin_fires_started_and_completed(self):
"""Codex's built-in webSearch produces a start/complete bubble pair
with the query as preview and args (#26541)."""
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "webSearch",
"id": "ws-1",
"query": "hermes agent docs",
}))
bridge(_item_completed({
"type": "webSearch",
"id": "ws-1",
"query": "hermes agent docs",
}))
calls = agent.tool_progress_callback.call_args_list
assert [c.args[0] for c in calls] == ["tool.started", "tool.completed"]
assert calls[0].args[1] == "web_search"
assert calls[0].args[2] == "hermes agent docs"
assert calls[0].args[3] == {"query": "hermes agent docs"}
def test_duration_falls_back_to_wall_time_when_codex_missing_ms(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "commandExecution",
"id": "exec-4",
"command": "sleep 0",
}))
bridge(_item_completed({
"type": "commandExecution",
"id": "exec-4",
"exitCode": 0,
"aggregatedOutput": "",
# no durationMs
}))
completed = agent.tool_progress_callback.call_args_list[1]
assert completed.kwargs["duration"] is not None
assert completed.kwargs["duration"] >= 0
def test_unknown_started_item_type_is_silent(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({"type": "plan", "id": "p-1"}))
agent.tool_progress_callback.assert_not_called()
class TestAgentMessageInterimDispatch:
def test_completed_agent_message_emits_interim(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_completed({
"type": "agentMessage",
"id": "am-1",
"text": "I'll check the config first.",
}))
agent._emit_interim_assistant_message.assert_called_once_with(
{"role": "assistant", "content": "I'll check the config first."}
)
def test_empty_text_does_not_emit_interim(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_completed({
"type": "agentMessage", "id": "am-2", "text": " ",
}))
bridge(_item_completed({
"type": "agentMessage", "id": "am-3", "text": ""
}))
agent._emit_interim_assistant_message.assert_not_called()
def test_completed_agent_message_does_not_fire_tool_progress(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_completed({
"type": "agentMessage", "id": "am-4", "text": "hi",
}))
agent.tool_progress_callback.assert_not_called()
def test_show_commentary_off_suppresses_interim(self):
"""display.show_commentary=false silences agentMessage interim
delivery on the app-server runtime (same contract as the
codex_responses commentary channel)."""
agent = _make_stub_agent()
agent.show_commentary = False
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_completed({
"type": "agentMessage", "id": "am-5", "text": "I'll check config.",
}))
agent._emit_interim_assistant_message.assert_not_called()
# Tool progress is unaffected by the commentary toggle.
bridge(_item_started({
"type": "commandExecution", "id": "cmd-1", "command": "ls",
}))
agent.tool_progress_callback.assert_called_once()
class TestBridgeRobustness:
def test_non_dict_notification_is_ignored(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge("not-a-dict") # type: ignore[arg-type]
bridge(None) # type: ignore[arg-type]
bridge(123) # type: ignore[arg-type]
agent.tool_progress_callback.assert_not_called()
agent._fire_stream_delta.assert_not_called()
agent._emit_interim_assistant_message.assert_not_called()
def test_missing_params_is_ignored(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
bridge({"method": "item/started"})
bridge({"method": "item/completed"})
agent.tool_progress_callback.assert_not_called()
def test_callback_exceptions_do_not_propagate(self):
# Buggy display callbacks must not tear down the codex turn loop.
agent = _make_stub_agent()
agent.tool_progress_callback.side_effect = RuntimeError("boom")
agent._fire_stream_delta.side_effect = RuntimeError("boom")
agent._emit_interim_assistant_message.side_effect = RuntimeError("boom")
bridge = make_codex_app_server_event_bridge(agent)
# All three paths must swallow exceptions silently.
bridge(_item_started({
"type": "commandExecution", "id": "exec-x", "command": "ls",
}))
bridge({"method": "item/agentMessage/delta",
"params": {"delta": "x"}})
bridge(_item_completed({
"type": "agentMessage", "id": "am-x", "text": "hi",
}))
def test_agent_without_callbacks_is_a_noop(self):
# Mirrors gateway-less / cron contexts where the agent never had
# the display callbacks set. Bridge must not raise.
agent = SimpleNamespace() # bare — none of the callbacks exist
bridge = make_codex_app_server_event_bridge(agent)
bridge(_item_started({
"type": "commandExecution", "id": "exec-y", "command": "ls",
}))
bridge(_item_completed({
"type": "commandExecution", "id": "exec-y",
"exitCode": 0, "aggregatedOutput": "",
}))
bridge({"method": "item/agentMessage/delta",
"params": {"delta": "x"}})
bridge({"method": "item/reasoning/delta",
"params": {"delta": "x"}})
bridge(_item_completed({
"type": "agentMessage", "id": "am", "text": "hi",
}))
def test_silent_methods_do_not_fire_anything(self):
agent = _make_stub_agent()
bridge = make_codex_app_server_event_bridge(agent)
for method in ("turn/started", "turn/completed", "thread/started",
"item/commandExecution/outputDelta"):
bridge({"method": method, "params": {}})
agent.tool_progress_callback.assert_not_called()
agent._fire_stream_delta.assert_not_called()
agent._fire_reasoning_delta.assert_not_called()
agent._emit_interim_assistant_message.assert_not_called()
# ---------- end-to-end: bridge is wired in run_codex_app_server_turn ----------
class TestBridgeWiredInRuntime:
"""Verify run_codex_app_server_turn actually constructs the session
with `on_event=<bridge>`. This is the integration guard that prevents
a future refactor from dropping the bridge wiring and silently
regressing Discord/Telegram live progress visibility."""
def test_session_constructor_receives_on_event(self, monkeypatch):
from agent import codex_runtime
captured: dict = {}
class FakeSession:
def __init__(self, **kwargs):
captured.update(kwargs)
def run_turn(self, user_input, **_):
from agent.transports.codex_app_server_session import TurnResult
return TurnResult(
final_text="done",
projected_messages=[],
tool_iterations=0,
turn_id="t1",
thread_id="th1",
)
def close(self):
pass
monkeypatch.setattr(
"agent.transports.codex_app_server_session.CodexAppServerSession",
FakeSession,
)
# Minimal stub agent — the runtime only touches a handful of
# attributes and we mock the heavy ones to keep the test fast.
agent = SimpleNamespace(
session_cwd=None,
_codex_session=None,
tool_progress_callback=MagicMock(),
_fire_stream_delta=MagicMock(),
_fire_reasoning_delta=MagicMock(),
_emit_interim_assistant_message=MagicMock(),
_iters_since_skill=0,
_skill_nudge_interval=0,
valid_tool_names=set(),
_sync_external_memory_for_turn=lambda **_: None,
_spawn_background_review=lambda **_: None,
# Usage accounting attrs read by _record_codex_app_server_usage.
session_api_calls=0,
session_prompt_tokens=0,
session_completion_tokens=0,
session_reasoning_tokens=0,
session_cached_tokens=0,
session_total_tokens=0,
context_compressor=None,
event_callback=None,
_session_db=None,
)
codex_runtime.run_codex_app_server_turn(
agent,
user_message="hi",
original_user_message="hi",
messages=[],
effective_task_id="t",
)
assert "on_event" in captured, (
"run_codex_app_server_turn must pass on_event=<bridge> to the "
"session — without it the gateway sees no live progress (#33200)"
)
assert callable(captured["on_event"]), (
"on_event must be the bridge callable, not None or a sentinel"
)
# And the bridge must actually drive the agent's callbacks when
# fed a representative notification.
captured["on_event"](_item_started({
"type": "commandExecution",
"id": "wired-1",
"command": "ls",
}))
agent.tool_progress_callback.assert_called_once()
assert agent.tool_progress_callback.call_args.args[0] == "tool.started"
assert agent.tool_progress_callback.call_args.args[1] == "exec_command"