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import os
import sys
import tempfile
import threading
import types
import unittest
import asyncio
from pathlib import Path
from types import SimpleNamespace
from unittest.mock import AsyncMock, patch
from app.agents.browser_use_bridge import (
BROWSER_USE_VERSION,
CAMOUFOX_SETUP_COMMAND,
CAMOUFOX_VERSION,
CDP_PROXY_COMMAND,
REMOTE_CDP_PROXY_PATH,
REMOTE_STEALTH_SERVER_PATH,
_create_e2b_desktop,
_start_local_worker,
_wait_for_external_cdp,
_worker_environment,
build_chrome_command,
build_e2b_sandbox_kwargs,
build_public_result,
build_worker_config,
cdp_proxy_script_source,
run_browser_use_agent,
translate_worker_event,
worker_script_source,
)
from app.agents.browser_use_worker import (
_browser_search_urls,
_normalize_browser_links,
_normalize_stealth_links,
_playwright_cookies,
)
import app.agents.cdp_proxy as cdp_proxy
from app.agents.cdp_proxy import _authorized_and_sanitized
MODEL = "nvidia/nemotron-3-ultra-550b-a55b:free"
class _FakeFiles:
def __init__(self):
self.data = {}
def write(self, path, data):
self.data[path] = data
return SimpleNamespace(path=path)
class _FakeRemoteHandle:
def __init__(self):
self.killed = False
def kill(self):
self.killed = True
return True
class _FakeCommands:
def __init__(self):
self.calls = []
self.handles = []
def run(self, command, **kwargs):
self.calls.append((command, kwargs))
handle = _FakeRemoteHandle()
self.handles.append(handle)
return handle
class _FakeDesktop:
def __init__(self):
self.files = _FakeFiles()
self.commands = _FakeCommands()
self.stream = _FakeStream()
self.killed = False
def get_host(self, port):
return f"{port}-sandbox.e2b.app"
def kill(self):
self.killed = True
class _FakeStream:
def __init__(self):
self.started = False
self.stopped = False
def start(self, **kwargs):
self.started = True
def get_auth_key(self):
return "visual-auth-key"
def get_url(self, **kwargs):
return "https://visual.example/session"
def stop(self):
self.stopped = True
class _FakeSandbox:
desktop = None
create_kwargs = None
@classmethod
def create(cls, **kwargs):
cls.create_kwargs = kwargs
cls.desktop = _FakeDesktop()
return cls.desktop
class _FakeLocalProcess:
def __init__(self, exit_code=0):
self.returncode = exit_code
self.terminated = False
self.killed = False
async def wait(self):
return self.returncode
def terminate(self):
self.terminated = True
self.returncode = -15
def kill(self):
self.killed = True
self.returncode = -9
def _successful_events_and_result():
events = [
{
"type": "step",
"step": 1,
"url": "https://duckduckgo.com/?q=lulinha",
"title": "Search",
"actions": [{"navigate": {"url": "https://source-one.example/profile"}}],
"next_goal": "Open the first direct source",
},
{
"type": "evidence",
"record": {
"claim": "Lulinha is Fábio Luís",
"exact_quote": "Fábio Luís, conhecido como Lulinha",
"url": "https://source-one.example/profile",
"title": "Profile",
"hostname": "source-one.example",
},
},
{
"type": "evidence",
"record": {
"claim": "A second source identifies the same person",
"exact_quote": "Fábio Luís Lula da Silva, o Lulinha",
"url": "https://source-two.example/story",
"title": "Story",
"hostname": "source-two.example",
},
},
]
result = {
"ok": True,
"answer": "Lulinha is Fábio Luís. Sources are linked below.",
"agent_success": True,
"is_done": True,
"urls": [
"https://duckduckgo.com/?q=lulinha",
"https://source-one.example/profile",
"https://source-two.example/story",
],
"steps": 3,
"duration_seconds": 9.2,
"evidence": [item["record"] for item in events if item["type"] == "evidence"],
"model": MODEL,
}
return events, result
class _FakeResponse:
status_code = 200
def json(self):
return {
"webSocketDebuggerUrl": (
"ws://127.0.0.1:9222/devtools/browser/internal-browser-id"
)
}
class _FakeHttpClient:
calls = []
def __init__(self, *args, **kwargs):
pass
async def __aenter__(self):
return self
async def __aexit__(self, *args):
return False
async def get(self, url, headers):
self.calls.append((url, headers))
return _FakeResponse()
class BrowserUseBridgeTests(unittest.IsolatedAsyncioTestCase):
def test_host_worker_is_standalone_remote_cdp_code(self):
source = worker_script_source()
compile(source, "<browser-use-worker>", "exec")
self.assertIn("from browser_use import", source)
self.assertIn("record_evidence", source)
self.assertIn("final_response_after_failure=True", source)
self.assertNotIn(' "done",', source)
self.assertNotIn("finish_research", source)
self.assertIn("LANCER_CDP_URL", source)
self.assertIn("x-lancer-cdp-token", source)
self.assertIn("BrowserProfile", source)
self.assertIn("block_ip_addresses=True", source)
self.assertIn("MAX_PAGE_TEXT_CHARS", source)
self.assertIn(".slice(0, limit)", source)
self.assertIn("browser_search", source)
self.assertIn("open_source", source)
self.assertIn("_inspect_search_page", source)
self.assertIn('"navigate",', source)
self.assertIn('"search",', source)
self.assertIn("enable_planning=False", source)
self.assertIn("captcha_solver=True", source)
self.assertIn('llm_kwargs["reasoning_effort"] = "low"', source)
self.assertIn('llm_kwargs["reasoning_models"] = [worker_model]', source)
self.assertIn('"max_retries": 3', source)
self.assertIn("use_thinking=False", source)
self.assertNotIn("SearXNG", source)
self.assertNotIn("searxng", source.casefold())
self.assertIn("raw_page_text = await page.evaluate", source)
self.assertIn("quote_normalized in page_text_normalized", source)
self.assertNotIn("Fuzzy fallback", source)
self.assertNotIn("match_ratio", source)
self.assertNotIn("executable_path=", source)
self.assertIn("Camoufox", source)
self.assertIn("stealth_gateway_url", source)
self.assertIn("captcha_solved", source)
def test_camoufox_snapshot_links_and_cookies_are_sanitized(self):
links = _normalize_stealth_links(
{
"elements": [
{
"text": "Search link",
"href": "https://search.brave.com/help",
},
{
"text": "Direct source",
"href": "https://news.example.org/article",
},
]
}
)
self.assertEqual(
links,
[{"title": "Direct source", "url": "https://news.example.org/article"}],
)
cookies = _playwright_cookies(
[
{
"name": "clearance",
"value": "ok",
"domain": ".example.org",
"path": "/",
"sameSite": "lax",
"unsupported": "discard-me",
}
]
)
self.assertEqual(cookies[0]["sameSite"], "Lax")
self.assertNotIn("unsupported", cookies[0])
def test_live_browser_search_filters_serp_links_and_unwraps_targets(self):
engines = dict(_browser_search_urls("quem é lulinha?"))
self.assertIn("search.brave.com", engines["Brave Search"])
self.assertNotIn("google.com", " ".join(engines.values()))
links = _normalize_browser_links(
[
{"title": "Search navigation", "url": "https://search.brave.com/help"},
{
"title": "Direct article",
"url": "https://noticias.example.org/reportagem",
},
{
"title": "Wrapped article",
"url": (
"https://duckduckgo.com/l/?uddg="
"https%3A%2F%2Fsecond.example.com%2Fprofile"
),
},
{
"title": "Yahoo wrapped article",
"url": (
"https://r.search.yahoo.com/_ylt=x/RV=2/RU="
"https%3A%2F%2Fthird.example.net%2Fbio/RK=2/RS=x"
),
},
]
)
self.assertEqual(
[item["url"] for item in links],
[
"https://noticias.example.org/reportagem",
"https://second.example.com/profile",
"https://third.example.net/bio",
],
)
def test_proxy_is_dependency_free_authenticated_and_rewrites_host(self):
source = cdp_proxy_script_source()
compile(source, "<cdp-proxy>", "exec")
request = (
b"GET /json/version HTTP/1.1\r\n"
b"Host: 9223-public.e2b.app\r\n"
b"X-Lancer-CDP-Token: correct-token\r\n"
b"Connection: Upgrade\r\n\r\n"
)
sanitized = _authorized_and_sanitized(request, "correct-token")
self.assertIsNotNone(sanitized)
self.assertIn(b"Host: 127.0.0.1:9222", sanitized)
self.assertNotIn(b"correct-token", sanitized)
self.assertIsNone(_authorized_and_sanitized(request, "wrong-token"))
async def test_proxy_tunnels_websocket_bytes_after_authenticated_upgrade(self):
captured = {}
upstream_done = asyncio.Event()
proxy_done = asyncio.Event()
async def fake_chrome(reader, writer):
try:
captured["headers"] = await reader.readuntil(b"\r\n\r\n")
writer.write(
b"HTTP/1.1 101 Switching Protocols\r\n"
b"Upgrade: websocket\r\n"
b"Connection: Upgrade\r\n\r\n"
)
await writer.drain()
payload = await reader.readexactly(4)
writer.write(payload.upper())
await writer.drain()
finally:
writer.close()
await writer.wait_closed()
upstream_done.set()
async def proxy_connection(reader, writer):
try:
await cdp_proxy._handle_client(reader, writer)
finally:
proxy_done.set()
upstream = await asyncio.start_server(fake_chrome, "127.0.0.1", 0)
upstream_port = upstream.sockets[0].getsockname()[1]
with (
patch.object(cdp_proxy, "TOKEN", "correct-token"),
patch.object(cdp_proxy, "UPSTREAM_PORT", upstream_port),
):
proxy = await asyncio.start_server(
proxy_connection,
"127.0.0.1",
0,
)
proxy_port = proxy.sockets[0].getsockname()[1]
reader, writer = await asyncio.open_connection("127.0.0.1", proxy_port)
writer.write(
b"GET /devtools/browser/id HTTP/1.1\r\n"
b"Host: public.example\r\n"
b"Upgrade: websocket\r\n"
b"Connection: Upgrade\r\n"
b"X-Lancer-CDP-Token: correct-token\r\n\r\n"
)
await writer.drain()
response = await reader.readuntil(b"\r\n\r\n")
self.assertIn(b"101 Switching Protocols", response)
writer.write(b"ping")
await writer.drain()
self.assertEqual(await reader.readexactly(4), b"PING")
writer.close()
await writer.wait_closed()
await asyncio.wait_for(upstream_done.wait(), timeout=2)
await asyncio.wait_for(proxy_done.wait(), timeout=2)
proxy.close()
await proxy.wait_closed()
upstream.close()
await upstream.wait_closed()
self.assertIn(f"Host: 127.0.0.1:{upstream_port}".encode(), captured["headers"])
self.assertNotIn(b"correct-token", captured["headers"])
def test_chrome_launch_is_remote_debuggable_and_headless_is_explicit(self):
visual = build_chrome_command(visual=True)
headless = build_chrome_command(visual=False)
self.assertIn("--remote-debugging-port=9222", visual)
self.assertIn("--remote-allow-origins=*", visual)
self.assertNotIn("--headless=new", visual)
self.assertIn("--headless=new", headless)
def test_config_is_non_secret_and_uses_current_normal_depth_preset(self):
config = build_worker_config(
task="quem é lulinha?",
url=None,
visual=False,
model=MODEL,
)
serialized = json.dumps(config)
self.assertEqual(config["minimum_sources"], 2)
self.assertEqual(config["min_evidence_to_finish"], 2)
self.assertTrue(config["headless"])
self.assertEqual(config["max_steps"], 18)
self.assertEqual(config["llm_timeout"], 120)
self.assertEqual(config["step_timeout"], 150)
self.assertEqual(config["worker_timeout"], 600)
self.assertNotIn("api_key", serialized.casefold())
self.assertNotIn("secret", serialized.casefold())
def test_prebuilt_e2b_template_is_optional_and_explicit(self):
default_settings = SimpleNamespace(e2b_api_key="key")
template_settings = SimpleNamespace(
e2b_api_key="key",
e2b_browser_template="lancer-browser-v1",
)
self.assertNotIn("template", build_e2b_sandbox_kwargs(default_settings))
self.assertEqual(
build_e2b_sandbox_kwargs(template_settings)["template"],
"lancer-browser-v1",
)
def test_worker_environment_does_not_copy_unrelated_host_secrets(self):
with patch.dict(
os.environ,
{
"E2B_API_KEY": "must-not-cross",
"AWS_SECRET_ACCESS_KEY": "must-not-cross-either",
},
):
environment = _worker_environment(
openrouter_api_key="openrouter-key",
cdp_url="wss://9223-sandbox.e2b.app/devtools/browser/id",
cdp_token="cdp-token",
runtime_dir=Path("/tmp/test-runtime"),
)
self.assertNotIn("E2B_API_KEY", environment)
self.assertNotIn("AWS_SECRET_ACCESS_KEY", environment)
self.assertEqual(environment["OPENROUTER_API_KEY"], "openrouter-key")
self.assertEqual(environment["LANCER_CDP_TOKEN"], "cdp-token")
self.assertEqual(environment["PYTHON_DOTENV_DISABLED"], "1")
self.assertEqual(environment["PYTHONNOUSERSITE"], "1")
self.assertEqual(environment["HOME"], str(Path("/tmp/test-runtime") / "home"))
self.assertNotIn("PYTHONPATH", environment)
async def test_local_worker_starts_in_its_private_runtime_directory(self):
fake_process = _FakeLocalProcess()
with tempfile.TemporaryDirectory() as temp_dir:
runtime = Path(temp_dir)
config_path = runtime / "config.json"
config_path.write_text("{}", encoding="utf-8")
with patch(
"app.agents.browser_use_bridge.asyncio.create_subprocess_exec",
new=AsyncMock(return_value=fake_process),
) as spawn:
await _start_local_worker(
config_path=config_path,
events_path=runtime / "events.jsonl",
result_path=runtime / "result.json",
log_path=runtime / "worker.log",
environment={"PATH": os.environ.get("PATH", "")},
)
self.assertEqual(spawn.await_args.kwargs["cwd"], str(runtime))
async def test_cancelled_creation_kills_late_e2b_sandbox(self):
started = threading.Event()
release = threading.Event()
created = _FakeDesktop()
class SlowSandbox:
@classmethod
def create(cls, **kwargs):
started.set()
release.wait(timeout=2)
return created
task = asyncio.create_task(_create_e2b_desktop(SlowSandbox, timeout=720))
self.assertTrue(await asyncio.to_thread(started.wait, 1))
task.cancel()
release.set()
with self.assertRaises(asyncio.CancelledError):
await task
self.assertTrue(created.killed)
async def test_external_cdp_probe_converts_internal_ws_to_public_wss(self):
_FakeHttpClient.calls = []
desktop = _FakeDesktop()
with patch(
"app.agents.browser_use_bridge.httpx.AsyncClient",
_FakeHttpClient,
):
url = await _wait_for_external_cdp(desktop, "per-run-token")
self.assertEqual(
url,
"wss://9223-sandbox.e2b.app/devtools/browser/internal-browser-id",
)
request_url, headers = _FakeHttpClient.calls[0]
self.assertEqual(request_url, "https://9223-sandbox.e2b.app/json/version")
self.assertEqual(headers["x-lancer-cdp-token"], "per-run-token")
def test_translation_exposes_only_accepted_evidence_as_facts(self):
progress = {"evidence": [], "next_goals": [], "queries": []}
events = translate_worker_event(
{
"type": "step",
"step": 2,
"url": "https://example.com",
"title": "Example",
"actions": [{"browser_search": {"query": "focused query"}}],
"memory": "Unverified model memory must not appear as evidence",
"next_goal": "Open the original source",
},
progress,
)
public_progress = next(item for item in events if item["type"] == "progress")
self.assertEqual(public_progress["known_facts"], [])
self.assertEqual(public_progress["last_queries"], ["focused query"])
self.assertEqual(public_progress["missing_points"], ["Open the original source"])
def test_public_result_never_promotes_search_or_visited_urls(self):
config = build_worker_config(
task="quem é alguém?",
url=None,
visual=False,
model="test-model",
)
public = build_public_result(
{
"ok": True,
"answer": "Useful partial answer",
"agent_success": True,
"urls": [
"https://duckduckgo.com/?q=someone",
"https://unverified.example/page",
"https://verified.example/page",
],
"evidence": [
{
"claim": "Verified claim",
"exact_quote": "A sufficiently long exact quotation",
"url": "https://verified.example/page",
},
{
"claim": "Snippet claim",
"exact_quote": "A search snippet must never count",
"url": "https://duckduckgo.com/?q=someone",
},
],
},
config,
)
self.assertEqual(public["links"], ["https://verified.example/page"])
self.assertFalse(public["success"])
self.assertIn("1/2", public["content"])
self.assertIn("https://unverified.example/page", public["visited_links"])
self.assertEqual(public["verification_status"], "partial")
def test_public_result_without_recorded_evidence_is_never_verified(self):
config = build_worker_config(
task="research a person",
url=None,
visual=False,
model="test-model",
)
public = build_public_result(
{
"ok": True,
"answer": "A useful evaluator draft",
"agent_success": True,
"urls": ["https://visited.example/profile"],
"evidence": [],
},
config,
)
self.assertFalse(public["success"])
self.assertEqual(public["links"], [])
self.assertEqual(public["evidence"], [])
self.assertEqual(public["verification_status"], "partial")
self.assertIn("0/1", public["content"])
self.assertNotIn("Citação validada pelo Evaluator", worker_script_source())
def test_subdomains_of_one_publisher_are_not_independent_sources(self):
config = build_worker_config(
task="quem é alguém?",
url=None,
visual=False,
model="test-model",
)
public = build_public_result(
{
"ok": True,
"answer": "Answer",
"agent_success": True,
"evidence": [
{
"claim": "Claim one",
"exact_quote": "A sufficiently long literal quote one",
"url": "https://pt.wikipedia.org/wiki/Person",
},
{
"claim": "Claim two",
"exact_quote": "A sufficiently long literal quote two",
"url": "https://en.wikipedia.org/wiki/Person",
},
],
},
config,
)
self.assertEqual(public["verified_sources"], 1)
self.assertFalse(public["success"])
async def test_full_bridge_runs_host_browser_use_with_camoufox_in_e2b(self):
fake_module = types.ModuleType("e2b_desktop")
fake_module.Sandbox = _FakeSandbox
settings = SimpleNamespace(
e2b_api_key="e2b-test-key",
openrouter_api_key="openrouter-test-key",
llm_model=MODEL,
)
captured = {}
async def fake_start_local_worker(**kwargs):
captured["environment"] = dict(kwargs["environment"])
captured["config"] = kwargs["config_path"].read_text(encoding="utf-8")
events, result = _successful_events_and_result()
kwargs["events_path"].write_text(
"\n".join(json.dumps(item) for item in events) + "\n",
encoding="utf-8",
)
kwargs["result_path"].write_text(json.dumps(result), encoding="utf-8")
return _FakeLocalProcess()
_FakeSandbox.desktop = None
with (
patch.dict(sys.modules, {"e2b_desktop": fake_module}),
patch("app.agents.browser_use_bridge.get_settings", return_value=settings),
patch(
"app.agents.browser_use_bridge.installed_browser_use_version",
return_value=BROWSER_USE_VERSION,
),
patch(
"app.agents.browser_use_bridge._wait_for_external_cdp",
new=AsyncMock(
return_value=(
"wss://9223-sandbox.e2b.app/devtools/browser/test-browser"
)
),
),
patch(
"app.agents.browser_use_bridge._wait_for_external_stealth_browser",
new=AsyncMock(return_value="https://8766-sandbox.e2b.app"),
),
patch(
"app.agents.browser_use_bridge._start_local_worker",
side_effect=fake_start_local_worker,
),
):
events = [
event
async for event in run_browser_use_agent(
"quem é lulinha?",
visual=False,
)
]
desktop = _FakeSandbox.desktop
commands = [command for command, _ in desktop.commands.calls]
self.assertTrue(any("google-chrome" in command for command in commands))
self.assertIn(CDP_PROXY_COMMAND, commands)
self.assertIn(CAMOUFOX_SETUP_COMMAND, commands)
self.assertTrue(any(f"camoufox=={CAMOUFOX_VERSION}" in command for command in commands))
self.assertFalse(any("browser-use==" in command for command in commands))
self.assertNotIn("openrouter-test-key", " ".join(commands))
self.assertIn(REMOTE_CDP_PROXY_PATH, desktop.files.data)
self.assertIn(REMOTE_STEALTH_SERVER_PATH, desktop.files.data)
self.assertTrue(desktop.killed)
background_handles = [
handle
for (_, kwargs), handle in zip(
desktop.commands.calls,
desktop.commands.handles,
)
if kwargs.get("background")
]
self.assertTrue(background_handles)
self.assertTrue(all(handle.killed for handle in background_handles))
# Regression: E2B rejects several mathematically valid reserved CIDRs
# (including 0.0.0.0/8) with HTTP 400. Network policy must not prevent
# the browser sandbox from being created.
self.assertNotIn("network", _FakeSandbox.create_kwargs)
self.assertNotIn("template", _FakeSandbox.create_kwargs)
config_text = captured["config"]
worker_environment = captured["environment"]
self.assertNotIn("openrouter-test-key", config_text)
self.assertNotIn("e2b-test-key", config_text)
self.assertIn("https://8766-sandbox.e2b.app", config_text)
self.assertEqual(worker_environment["OPENROUTER_API_KEY"], "openrouter-test-key")
self.assertNotIn("E2B_API_KEY", worker_environment)
result = next(item for item in events if item["type"] == "result")
self.assertTrue(result["success"])
self.assertEqual(result["verified_sources"], 2)
self.assertNotIn("https://duckduckgo.com/?q=lulinha", result["links"])
async def test_missing_pinned_host_runtime_fails_before_creating_e2b(self):
settings = SimpleNamespace(
e2b_api_key="e2b-test-key",
openrouter_api_key="openrouter-test-key",
llm_model=MODEL,
)
_FakeSandbox.desktop = None
with (
patch("app.agents.browser_use_bridge.get_settings", return_value=settings),
patch(
"app.agents.browser_use_bridge.installed_browser_use_version",
return_value="",
),
):
events = [
event
async for event in run_browser_use_agent("research", visual=False)
]
self.assertEqual(len(events), 1)
self.assertEqual(events[0]["type"], "error")
self.assertIn(f"browser-use=={BROWSER_USE_VERSION}", events[0]["message"])
self.assertIsNone(_FakeSandbox.desktop)
async def test_runtime_failure_redacts_every_request_credential(self):
fake_module = types.ModuleType("e2b_desktop")
fake_module.Sandbox = _FakeSandbox
settings = SimpleNamespace(
e2b_api_key="e2b-test-key",
openrouter_api_key="openrouter-test-key",
llm_model=MODEL,
)
failure = RuntimeError(
"gateway rejected cdp-secret-token openrouter-test-key e2b-test-key"
)
_FakeSandbox.desktop = None
with (
patch.dict(sys.modules, {"e2b_desktop": fake_module}),
patch("app.agents.browser_use_bridge.get_settings", return_value=settings),
patch(
"app.agents.browser_use_bridge.installed_browser_use_version",
return_value=BROWSER_USE_VERSION,
),
patch(
"app.agents.browser_use_bridge.secrets.token_urlsafe",
return_value="cdp-secret-token",
),
patch(
"app.agents.browser_use_bridge._wait_for_external_cdp",
new=AsyncMock(side_effect=failure),
),
self.assertLogs("app.agents.browser_use_bridge", level="ERROR") as logs,
):
events = [
event
async for event in run_browser_use_agent("research", visual=False)
]
combined = json.dumps(events, ensure_ascii=False) + "\n" + "\n".join(logs.output)
self.assertIn("[REDACTED]", combined)
self.assertNotIn("cdp-secret-token", combined)
self.assertNotIn("openrouter-test-key", combined)
self.assertNotIn("e2b-test-key", combined)
self.assertTrue(_FakeSandbox.desktop.killed)
self.assertTrue(
all(handle.killed for handle in _FakeSandbox.desktop.commands.handles)
)
async def test_visual_failure_ends_stream_before_reporting_error(self):
fake_module = types.ModuleType("e2b_desktop")
fake_module.Sandbox = _FakeSandbox
settings = SimpleNamespace(
e2b_api_key="e2b-test-key",
openrouter_api_key="openrouter-test-key",
llm_model=MODEL,
)
_FakeSandbox.desktop = None
with (
patch.dict(sys.modules, {"e2b_desktop": fake_module}),
patch("app.agents.browser_use_bridge.get_settings", return_value=settings),
patch(
"app.agents.browser_use_bridge.installed_browser_use_version",
return_value=BROWSER_USE_VERSION,
),
patch(
"app.agents.browser_use_bridge._wait_for_external_cdp",
new=AsyncMock(
return_value="wss://9223-sandbox.e2b.app/devtools/browser/id"
),
),
patch(
"app.agents.browser_use_bridge._start_local_worker",
new=AsyncMock(side_effect=RuntimeError("worker startup failed")),
),
):
events = [
event
async for event in run_browser_use_agent("research", visual=True)
]
event_types = [event["type"] for event in events]
self.assertIn("stream", event_types)
self.assertLess(event_types.index("stream_end"), event_types.index("error"))
self.assertTrue(_FakeSandbox.desktop.stream.stopped)
if __name__ == "__main__":
unittest.main()
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