Files
pipecat/tests/test_ui_worker.py
Mark Backman f1f5a986e8 Add UIWorker
UIWorker is an LLMContextWorker that observes and drives a client GUI over the
RTVI UI channel: it stores accessibility snapshots, auto-injects <ui_state> at
the start of each respond job, dispatches client events to @on_ui_event
handlers, sends UI commands back to the client, and surfaces fan-out work as
cancellable task cards via user_job_group(). The optional ReplyToolMixin exposes
a bundled reply tool.

The prompt_guide parameter auto-appends the UI wire-format guide to the LLM's
system instruction (default UI_STATE_PROMPT_GUIDE; override with a string or
disable with None), so the LLM can parse the injected <ui_state> / <ui_event>
messages without the app concatenating the guide by hand.
2026-05-21 23:20:40 -04:00

806 lines
28 KiB
Python

#
# Copyright (c) 2026, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#
"""Tests for UIWorker dispatch, LLM-context injection, and single-flight respond."""
import asyncio
import json
import unittest
from unittest.mock import AsyncMock, MagicMock
from pipecat.bus.messages import BusJobCancelMessage, BusJobRequestMessage
from pipecat.bus.ui_messages import _UI_SNAPSHOT_BUS_EVENT_NAME, BusUIEventMessage
from pipecat.frames.frames import LLMMessagesAppendFrame, LLMMessagesUpdateFrame
from pipecat.processors.frame_processor import FrameDirection
from pipecat.utils.asyncio.task_manager import TaskManager, TaskManagerParams
from pipecat.workers.ui import UI_STATE_PROMPT_GUIDE, UIWorker, on_ui_event
class _StubUIWorker(UIWorker):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.captured: list[BusUIEventMessage] = []
@on_ui_event("nav_click")
async def _on_nav(self, message: BusUIEventMessage) -> None:
self.captured.append(message)
class _PlainWorker(UIWorker):
pass
async def _make_worker(cls=_StubUIWorker, **kwargs) -> UIWorker:
"""A UIWorker wired with a task manager and a ``queue_frame`` spy.
``queue_frame`` is replaced with a recorder so tests can assert the
frames the UI logic produces without running the pipeline. The
respond handler sends its own response, so ``send_job_response`` is
mocked to let ``respond_with_llm`` run without an active job entry.
"""
worker = cls("ui", llm=MagicMock(), active=False, **kwargs)
tm = TaskManager()
tm.setup(TaskManagerParams(loop=asyncio.get_running_loop()))
worker._task_manager = tm
recorded: list = []
async def _record(frame, direction=FrameDirection.DOWNSTREAM):
recorded.append(frame)
worker.queue_frame = _record # type: ignore[method-assign]
worker._recorded = recorded # type: ignore[attr-defined]
worker.send_job_response = AsyncMock() # type: ignore[method-assign]
return worker
async def _settle() -> None:
"""Yield enough times for spawned task handlers to run/park."""
for _ in range(10):
await asyncio.sleep(0)
async def _start(worker: UIWorker, message: BusJobRequestMessage) -> asyncio.Task:
"""Start a respond turn; it parks at ``await self._pending`` until resolved."""
t = asyncio.create_task(worker.respond_with_llm(message))
await _settle()
return t
def _respond_msg(job_id: str, query: str = "hi") -> BusJobRequestMessage:
return BusJobRequestMessage(
source="voice", target="ui", job_name="respond", job_id=job_id, payload={"query": query}
)
async def _dispatch(worker: UIWorker, message: BusUIEventMessage) -> None:
await worker.on_bus_message(message)
for _ in range(5):
await asyncio.sleep(0)
def _append_frames(worker) -> list[LLMMessagesAppendFrame]:
return [f for f in worker._recorded if isinstance(f, LLMMessagesAppendFrame)]
def _update_frames(worker) -> list[LLMMessagesUpdateFrame]:
return [f for f in worker._recorded if isinstance(f, LLMMessagesUpdateFrame)]
class TestUIWorkerDispatch(unittest.IsolatedAsyncioTestCase):
async def test_dispatches_to_matching_on_ui_event_handler(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="nav_click", payload={"view": "home"}
),
)
self.assertEqual(len(worker.captured), 1)
self.assertEqual(worker.captured[0].event_name, "nav_click")
self.assertEqual(worker.captured[0].payload, {"view": "home"})
async def test_unknown_event_name_does_not_raise(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="never_registered", payload={"x": 1}
),
)
self.assertEqual(worker.captured, [])
async def test_ignores_events_targeted_at_other_workers(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music",
target="someone_else",
event_name="nav_click",
payload={"view": "home"},
),
)
self.assertEqual(worker.captured, [])
self.assertEqual(_append_frames(worker), [])
async def test_broadcast_event_with_no_target_is_handled(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music", target=None, event_name="nav_click", payload={"view": "home"}
),
)
self.assertEqual(len(worker.captured), 1)
async def test_handler_runs_in_separate_task_so_bus_is_not_blocked(self):
gate = asyncio.Event()
observed: list[bool] = []
class _BlockingWorker(_StubUIWorker):
@on_ui_event("slow")
async def _slow(self, message):
await gate.wait()
observed.append(True)
worker = await _make_worker(cls=_BlockingWorker)
await worker.on_bus_message(
BusUIEventMessage(source="music", target="ui", event_name="slow", payload={})
)
self.assertEqual(observed, [])
gate.set()
await _settle()
self.assertEqual(observed, [True])
async def test_duplicate_handler_names_raise_at_init(self):
with self.assertRaises(ValueError):
class _Bad(UIWorker):
@on_ui_event("nav")
async def a(self, message):
pass
@on_ui_event("nav")
async def b(self, message):
pass
_Bad("ui", llm=MagicMock())
async def test_bridged_with_default_auto_inject_raises(self):
with self.assertRaises(ValueError) as ctx:
_PlainWorker("ui", llm=MagicMock(), bridged=())
self.assertIn("bridged", str(ctx.exception))
self.assertIn("auto_inject_ui_state", str(ctx.exception))
async def test_bridged_with_explicit_auto_inject_disabled_is_allowed(self):
worker = _PlainWorker("ui", llm=MagicMock(), bridged=(), auto_inject_ui_state=False)
self.assertFalse(worker._auto_inject_ui_state)
async def test_default_construction_unaffected(self):
worker = _PlainWorker("ui", llm=MagicMock())
self.assertTrue(worker._auto_inject_ui_state)
self.assertTrue(worker.active)
class TestUIWorkerInjection(unittest.IsolatedAsyncioTestCase):
async def test_injects_xml_developer_message_by_default(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="nav_click", payload={"view": "home"}
),
)
frames = _append_frames(worker)
self.assertEqual(len(frames), 1)
frame = frames[0]
self.assertFalse(frame.run_llm)
self.assertEqual(len(frame.messages), 1)
msg = frame.messages[0]
self.assertEqual(msg["role"], "developer")
content = msg["content"]
self.assertIn('<ui_event name="nav_click">', content)
self.assertIn("</ui_event>", content)
inner = content[len('<ui_event name="nav_click">') : -len("</ui_event>")]
self.assertEqual(json.loads(inner), {"view": "home"})
async def test_inject_events_false_disables_injection(self):
worker = await _make_worker(inject_events=False)
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="nav_click", payload={"view": "home"}
),
)
self.assertEqual(_append_frames(worker), [])
self.assertEqual(len(worker.captured), 1)
async def test_render_override_replaces_default_xml(self):
class _CustomRender(_StubUIWorker):
def render_ui_event(self, message):
return f"[UI] {message.event_name}"
worker = await _make_worker(cls=_CustomRender)
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="nav_click", payload={"view": "home"}
),
)
frames = _append_frames(worker)
self.assertEqual(len(frames), 1)
self.assertEqual(frames[0].messages[0]["content"], "[UI] nav_click")
async def test_empty_render_skips_injection(self):
class _NoRender(_StubUIWorker):
def render_ui_event(self, message):
return ""
worker = await _make_worker(cls=_NoRender)
await _dispatch(
worker,
BusUIEventMessage(
source="music", target="ui", event_name="nav_click", payload={"view": "home"}
),
)
self.assertEqual(_append_frames(worker), [])
_SAMPLE_SNAPSHOT = {
"root": {
"ref": "e1",
"role": "generic",
"children": [
{
"ref": "e2",
"role": "main",
"children": [
{"ref": "e3", "role": "heading", "name": "Home", "level": 1},
{
"ref": "e4",
"role": "region",
"name": "Trending artists",
"children": [
{"ref": "e5", "role": "button", "name": "Bad Bunny"},
{
"ref": "e6",
"role": "button",
"name": "Taylor Swift",
"state": ["focused"],
},
],
},
],
},
],
},
"captured_at": 1700000000000,
}
class TestUIWorkerSnapshot(unittest.IsolatedAsyncioTestCase):
async def test_reserved_snapshot_event_stored_without_dispatch(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music",
target="ui",
event_name=_UI_SNAPSHOT_BUS_EVENT_NAME,
payload=_SAMPLE_SNAPSHOT,
),
)
self.assertEqual(worker._latest_snapshot, _SAMPLE_SNAPSHOT)
self.assertEqual(worker.captured, [])
self.assertEqual(_append_frames(worker), [])
async def test_non_dict_snapshot_payload_is_ignored(self):
worker = await _make_worker()
await _dispatch(
worker,
BusUIEventMessage(
source="music",
target="ui",
event_name=_UI_SNAPSHOT_BUS_EVENT_NAME,
payload="not a snapshot",
),
)
self.assertIsNone(worker._latest_snapshot)
async def test_render_ui_state_empty_without_snapshot(self):
worker = await _make_worker()
self.assertEqual(worker.render_ui_state(), "")
async def test_render_ui_state_produces_indented_block(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
rendered = worker.render_ui_state()
self.assertTrue(rendered.startswith("<ui_state>\n"))
self.assertTrue(rendered.endswith("\n</ui_state>"))
self.assertIn("- generic [ref=e1]:", rendered)
self.assertIn("- main [ref=e2]:", rendered)
self.assertIn('- heading "Home" [level=1] [ref=e3]', rendered)
self.assertIn('- region "Trending artists" [ref=e4]:', rendered)
self.assertIn('- button "Bad Bunny" [ref=e5]', rendered)
self.assertIn('- button "Taylor Swift" [focused] [ref=e6]', rendered)
self.assertIn(" - main", rendered)
self.assertIn(" - heading", rendered)
self.assertIn(" - button", rendered)
async def test_inject_ui_state_queues_expected_frame(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
await worker.inject_ui_state()
frames = _append_frames(worker)
self.assertEqual(len(frames), 1)
frame = frames[0]
self.assertFalse(frame.run_llm)
self.assertEqual(len(frame.messages), 1)
msg = frame.messages[0]
self.assertEqual(msg["role"], "developer")
self.assertTrue(msg["content"].startswith("<ui_state>"))
self.assertTrue(msg["content"].endswith("</ui_state>"))
async def test_inject_ui_state_no_op_without_snapshot(self):
worker = await _make_worker()
await worker.inject_ui_state()
self.assertEqual(_append_frames(worker), [])
async def test_render_emits_grid_dims(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {
"ref": "e1",
"role": "generic",
"children": [
{
"ref": "e2",
"role": "grid",
"name": "Trending artists",
"colcount": 8,
"rowcount": 2,
"children": [{"ref": "e3", "role": "button", "name": "Bad Bunny"}],
},
],
},
"captured_at": 1700000000000,
}
rendered = worker.render_ui_state()
self.assertIn('- grid "Trending artists" [cols=8] [rows=2] [ref=e2]', rendered)
async def test_render_preserves_offscreen_tag(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {
"ref": "e1",
"role": "generic",
"children": [
{"ref": "e2", "role": "button", "name": "Visible"},
{"ref": "e3", "role": "button", "name": "Below fold", "state": ["offscreen"]},
],
},
"captured_at": 1700000000000,
}
rendered = worker.render_ui_state()
self.assertIn('- button "Visible" [ref=e2]', rendered)
self.assertIn('- button "Below fold" [offscreen] [ref=e3]', rendered)
async def test_visible_nodes_empty_without_snapshot(self):
worker = await _make_worker()
self.assertEqual(worker.visible_nodes(), [])
async def test_render_emits_selection_block_when_present(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {"ref": "e1", "role": "generic", "children": [{"ref": "e2", "role": "main"}]},
"captured_at": 1700000000000,
"selection": {"ref": "e2", "text": "the highlighted passage"},
}
rendered = worker.render_ui_state()
self.assertIn('<selection ref="e2">', rendered)
self.assertIn("the highlighted passage", rendered)
self.assertIn("</selection>", rendered)
self.assertTrue(rendered.endswith("</ui_state>"))
sel_idx = rendered.index('<selection ref="e2">')
close_idx = rendered.index("</ui_state>")
self.assertLess(sel_idx, close_idx)
async def test_render_omits_selection_when_missing(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {"ref": "e1", "role": "generic"},
"captured_at": 1700000000000,
}
rendered = worker.render_ui_state()
self.assertNotIn("<selection", rendered)
async def test_render_skips_selection_with_missing_ref_or_text(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {"ref": "e1", "role": "generic"},
"captured_at": 1,
"selection": {"ref": "e2"},
}
self.assertNotIn("<selection", worker.render_ui_state())
worker._latest_snapshot = {
"root": {"ref": "e1", "role": "generic"},
"captured_at": 1,
"selection": {"text": "stuff"},
}
self.assertNotIn("<selection", worker.render_ui_state())
async def test_visible_nodes_filters_offscreen_entries(self):
worker = await _make_worker()
worker._latest_snapshot = {
"root": {
"ref": "e1",
"role": "generic",
"children": [
{"ref": "e2", "role": "button", "name": "Visible"},
{"ref": "e3", "role": "button", "name": "Below fold", "state": ["offscreen"]},
{
"ref": "e4",
"role": "region",
"name": "Tracks",
"state": ["offscreen"],
"children": [{"ref": "e5", "role": "button", "name": "Bloom"}],
},
],
},
"captured_at": 1700000000000,
}
refs = [n["ref"] for n in worker.visible_nodes()]
self.assertIn("e1", refs)
self.assertIn("e2", refs)
self.assertNotIn("e3", refs)
self.assertNotIn("e4", refs)
self.assertIn("e5", refs)
class TestUIWorkerAutoInject(unittest.IsolatedAsyncioTestCase):
async def test_respond_auto_injects_latest_snapshot(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
frames = _append_frames(worker)
self.assertEqual(len(frames), 2)
self.assertEqual(frames[0].messages[0]["role"], "developer")
self.assertTrue(frames[0].messages[0]["content"].startswith("<ui_state>"))
self.assertFalse(frames[0].run_llm)
self.assertEqual(frames[1].messages[0]["content"], "hi")
self.assertTrue(frames[1].run_llm)
await worker.respond_to_job()
await t
async def test_auto_inject_ui_state_false_suppresses_injection(self):
worker = await _make_worker(auto_inject_ui_state=False)
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
frames = _append_frames(worker)
self.assertEqual(len(frames), 1)
self.assertFalse(frames[0].messages[0]["content"].startswith("<ui_state>"))
await worker.respond_to_job()
await t
async def test_auto_inject_no_op_without_snapshot(self):
worker = await _make_worker()
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
frames = _append_frames(worker)
self.assertEqual(len(frames), 1)
self.assertFalse(frames[0].messages[0]["content"].startswith("<ui_state>"))
await worker.respond_to_job()
await t
class TestUIWorkerKeepHistory(unittest.IsolatedAsyncioTestCase):
async def test_default_resets_context_per_job(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
updates = _update_frames(worker)
self.assertEqual(len(updates), 1)
self.assertEqual(updates[0].messages, [])
self.assertFalse(updates[0].run_llm)
await worker.respond_to_job()
await t
async def test_reset_runs_before_inject(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
frame_types = [type(f).__name__ for f in worker._recorded]
update_idx = frame_types.index("LLMMessagesUpdateFrame")
append_idx = frame_types.index("LLMMessagesAppendFrame")
self.assertLess(update_idx, append_idx)
await worker.respond_to_job()
await t
async def test_keep_history_true_skips_reset(self):
worker = await _make_worker(keep_history=True)
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"query": "hi"}),
)
self.assertEqual(_update_frames(worker), [])
self.assertEqual(len(_append_frames(worker)), 2)
await worker.respond_to_job()
await t
async def test_reset_context_method_emits_update_frame(self):
worker = await _make_worker(keep_history=True)
await worker.reset_context()
updates = _update_frames(worker)
self.assertEqual(len(updates), 1)
self.assertEqual(updates[0].messages, [])
self.assertFalse(updates[0].run_llm)
class TestUIWorkerRespondToJob(unittest.IsolatedAsyncioTestCase):
async def test_current_job_tracks_in_flight_request(self):
worker = await _make_worker()
self.assertIsNone(worker.current_job)
message = BusJobRequestMessage(
source="voice", target="ui", job_id="t1", payload={"query": "hi"}
)
t = await _start(worker, message)
self.assertIs(worker.current_job, message)
await worker.respond_to_job()
await t
async def test_respond_to_job_clears_current_and_sends_response(self):
worker = await _make_worker()
message = BusJobRequestMessage(source="voice", target="ui", job_id="t1")
t = await _start(worker, message)
await worker.respond_to_job(speak="hello")
await t
worker.send_job_response.assert_awaited_once()
call = worker.send_job_response.await_args
self.assertEqual(call.args[0], "t1")
self.assertEqual(call.kwargs["response"], {"speak": "hello"})
self.assertIsNone(worker.current_job)
async def test_respond_to_job_no_op_when_idle(self):
worker = await _make_worker()
await worker.respond_to_job(speak="hello")
worker.send_job_response.assert_not_awaited()
async def test_respond_to_job_omits_speak_when_none(self):
worker = await _make_worker()
t = await _start(worker, BusJobRequestMessage(source="voice", target="ui", job_id="t1"))
await worker.respond_to_job()
await t
call = worker.send_job_response.await_args
self.assertEqual(call.kwargs["response"], {})
async def test_respond_to_job_merges_speak_into_response(self):
worker = await _make_worker()
t = await _start(worker, BusJobRequestMessage(source="voice", target="ui", job_id="t1"))
await worker.respond_to_job({"description": "scrolled"}, speak="ok")
await t
call = worker.send_job_response.await_args
self.assertEqual(call.kwargs["response"], {"description": "scrolled", "speak": "ok"})
async def test_cancellation_frees_lock_for_subsequent_jobs(self):
worker = await _make_worker()
msg_a = _respond_msg("a")
msg_b = _respond_msg("b")
await worker._handle_job_request(msg_a)
await _settle()
self.assertIs(worker.current_job, msg_a)
self.assertTrue(worker._job_locks["respond"].locked())
await worker._handle_job_cancel(
BusJobCancelMessage(source="voice", target="ui", job_id="a")
)
await _settle()
self.assertIsNone(worker.current_job)
self.assertFalse(worker._job_locks["respond"].locked())
await worker._handle_job_request(msg_b)
await _settle()
self.assertIs(worker.current_job, msg_b)
await worker.respond_to_job(speak="B done")
await _settle()
async def test_cancel_unknown_job_id_is_noop(self):
worker = await _make_worker()
msg_a = _respond_msg("a")
await worker._handle_job_request(msg_a)
await _settle()
await worker._handle_job_cancel(
BusJobCancelMessage(source="voice", target="ui", job_id="unrelated")
)
await _settle()
self.assertIs(worker.current_job, msg_a)
self.assertTrue(worker._job_locks["respond"].locked())
await worker.respond_to_job(speak="A done")
await _settle()
async def test_concurrent_same_name_jobs_serialize(self):
worker = await _make_worker()
msg_a = _respond_msg("a")
msg_b = _respond_msg("b")
await worker._handle_job_request(msg_a)
await _settle()
self.assertIs(worker.current_job, msg_a)
await worker._handle_job_request(msg_b)
await _settle()
self.assertIs(worker.current_job, msg_a)
await worker.respond_to_job(speak="A done")
await _settle()
self.assertIs(worker.current_job, msg_b)
await worker.respond_to_job(speak="B done")
await _settle()
self.assertIsNone(worker.current_job)
class TestUIWorkerRespondJob(unittest.IsolatedAsyncioTestCase):
async def test_respond_handler_runs_after_setup(self):
worker = await _make_worker()
worker._latest_snapshot = _SAMPLE_SNAPSHOT
t = await _start(
worker,
BusJobRequestMessage(
source="voice", target="ui", job_id="t1", payload={"query": "hello"}
),
)
appends = _append_frames(worker)
self.assertEqual(len(appends), 2)
self.assertTrue(appends[0].messages[0]["content"].startswith("<ui_state>"))
self.assertFalse(appends[0].run_llm)
self.assertEqual(appends[1].messages[0]["content"], "hello")
self.assertTrue(appends[1].run_llm)
self.assertEqual(worker.current_job.job_id, "t1")
await worker.respond_to_job(speak="done")
await t
self.assertIsNone(worker.current_job)
worker.send_job_response.assert_awaited_once()
async def test_render_query_override(self):
class _Custom(_StubUIWorker):
def render_query(self, message):
return f"Q: {message.payload['q']}"
worker = await _make_worker(cls=_Custom)
t = await _start(
worker,
BusJobRequestMessage(source="voice", target="ui", job_id="t1", payload={"q": "hi"}),
)
query_frames = [f for f in _append_frames(worker) if f.run_llm]
self.assertEqual(query_frames[0].messages[0]["content"], "Q: hi")
await worker.respond_to_job()
await t
async def test_handler_failure_clears_state(self):
class _Boom(_StubUIWorker):
def render_query(self, message):
raise RuntimeError("boom")
worker = await _make_worker(cls=_Boom)
with self.assertRaises(RuntimeError):
await worker.respond_with_llm(
BusJobRequestMessage(
source="voice", target="ui", job_id="t1", payload={"query": "x"}
)
)
self.assertIsNone(worker.current_job)
self.assertIsNone(worker._pending)
class TestUIWorkerPromptGuide(unittest.IsolatedAsyncioTestCase):
async def test_default_appends_ui_state_prompt_guide(self):
worker = UIWorker("ui", llm=MagicMock(), active=False)
worker.llm.append_system_instruction.assert_called_once_with(UI_STATE_PROMPT_GUIDE)
async def test_custom_prompt_guide_overrides(self):
worker = UIWorker("ui", llm=MagicMock(), active=False, prompt_guide="MY GUIDE")
worker.llm.append_system_instruction.assert_called_once_with("MY GUIDE")
async def test_none_disables_injection(self):
worker = UIWorker("ui", llm=MagicMock(), active=False, prompt_guide=None)
worker.llm.append_system_instruction.assert_not_called()
if __name__ == "__main__":
unittest.main()