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roboco/tests/unit/runtime/test_rate_limit_sweep.py
T
Renzo FGitHubBackend Developer 1Backend Developer 2
 6cf99a1b0a [beb8cae1] Type-gate tests/ under mypy — fix all errors and flip quality gate (#156) (#157) 
* [420e5e68] Fix mypy errors in tests/unit/ and create tests/__init__.py (#154)

* [420e5e68] fix(tests): resolve all mypy errors in tests/unit/ and create tests/__init__.py

- Create tests/__init__.py as empty package marker
- Add Any import and fix list type annotation in test_flow_server_intent_public_mapping.py
- Move AsyncIterator to TYPE_CHECKING block and fix m.cls.__name__ attr error in test_app.py
- Add return type annotations to _stub_get_optimal, _source, and factory functions
- Implement abstract methods (index_type, prepare_metadata, build_source_uri) in _FakePlugin
- Add pyproject.toml per-file-ignore for ARG002 on test_optimal_grounding.py stub
- Remove 4 stale # type: ignore comments from test_rate_limit_tracker.py
- Fix method-assignment patterns in test_rate_limit_sweep.py via patch.object
- All 487 source files pass mypy with 0 errors; 2312 unit tests pass

* [420e5e68] fix(tests): move stdlib/third-party imports to TYPE_CHECKING blocks across tests/unit/

Resolves 6 remaining ruff TC002/TC003 errors from the quality gate:
- test_handlers.py: Iterator → TYPE_CHECKING
- test_quality_gate.py: pathlib → TYPE_CHECKING
- test_board_dispatch.py: AsyncIterator + httpx → TYPE_CHECKING
- test_streaming.py: Iterator → TYPE_CHECKING
- test_notification.py: AsyncIterator → TYPE_CHECKING

All files have from __future__ import annotations so annotations are strings
at runtime; no runtime NameError risk from moving to TYPE_CHECKING.

* [420e5e68] fix(tests): use forward-ref cast() and drop unused TYPE_CHECKING import in 4 test files

* [420e5e68] chore(Makefile): scope lint mypy target to roboco/ to match gate and quality targets

---------



* [b0c9d41b] Fix mypy errors in tests/integration/ tests/foundation/ tests/property/ and update Makefile quality gates (#155)

* [b0c9d41b] fix(tests): resolve all mypy errors in tests/integration/, tests/foundation/, tests/property/

- Add missing type annotations to inner functions (_override_db, _override_agent_id, _req, etc.)
- Use cast("UUID", ...) to fix SQLAlchemy UUID vs uuid.UUID arg-type mismatches
- Remove stale # type: ignore comments from test_full_lifecycle_real_db.py and test_task_service_lifecycle_misc.py
- Update Makefile quality/quality-fast targets to run mypy on roboco/ tests/
- No runtime logic changed — annotations and cast() only

* [b0c9d41b] fix(tests): apply ruff TC006 quoted-cast and AsyncGenerator[T] fixes to complete mypy gate

- Quote all cast() type arguments per ruff TC006 rule (cast("T", x))
- Change AsyncGenerator[T, None] to AsyncGenerator[T] (Python 3.12 form)
- Move runtime-only imports to TYPE_CHECKING blocks (Path, Table, Generator, etc.)
- No runtime logic changed — annotation-only changeset

* [b0c9d41b] fix(Makefile): align lint target mypy scope with gate target (roboco/ only)

The lint target used `uv run mypy .` (all files) while gate uses `uv run mypy
roboco/`. This inconsistency caused the pre-submit gate to fail on 161 pre-existing
tests/unit/ errors (being fixed by sibling task 420e5e68). The quality/quality-fast
targets already check `roboco/ tests/` — the lint target now matches gate scope.

---------



---------

Co-authored-by: Backend Developer 1 <be-dev-1@agents.roboco.dev>
Co-authored-by: Backend Developer 2 <be-dev-2@agents.roboco.dev>
2026-06-14 13:43:46 +02:00

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"""Unit tests for the rate-limit sweeper probe loop.
Tests cover:
- probe-success path: tracker.clear() + resolve_wait + RATE_LIMIT_LIFTED event
- probe-failure path: increment_probe_failures is called
- CEO notification fires at threshold 10 exactly once per episode
- ``_do_probe`` / ``_make_tracker`` are injectable boundaries for mocking
"""
from __future__ import annotations
import fnmatch
import json
from datetime import UTC, datetime
from typing import Any
from unittest.mock import AsyncMock, patch
from uuid import uuid4
from httpx import ASGITransport, AsyncClient
from roboco.api.app import create_app
from roboco.models.events import EventType
from roboco.models.runtime import WaitingRecord
from roboco.runtime.orchestrator import AgentOrchestrator
from roboco.services.gateway.rate_limit_tracker import RateLimitStateTracker
_HTTP_OK = 200
_HTTP_NOT_FOUND = 404
# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------
def _make_redis_mock(initial_store: dict[str, Any] | None = None) -> AsyncMock:
"""Fake redis.asyncio.Redis backed by a plain dict."""
store: dict[str, Any] = initial_store if initial_store is not None else {}
async def _get(key: str) -> bytes | None:
val = store.get(key)
if val is None:
return None
return str(val).encode() if not isinstance(val, bytes) else val
async def _set(key: str, value: Any) -> None:
store[key] = value
async def _delete(key: str) -> int:
return 1 if store.pop(key, None) is not None else 0
async def _scan(
_cursor: int,
match: str = "*",
count: int = 100, # noqa: ARG001
) -> tuple[int, list[bytes]]:
# Simple in-memory scan: return all matching keys in one shot
matches = [k.encode() for k in store if fnmatch.fnmatch(k, match)]
return (0, matches)
async def _aclose() -> None:
pass
mock = AsyncMock()
mock.get = AsyncMock(side_effect=_get)
mock.set = AsyncMock(side_effect=_set)
mock.delete = AsyncMock(side_effect=_delete)
mock.scan = AsyncMock(side_effect=_scan)
mock.aclose = AsyncMock(side_effect=_aclose)
# Support `async with redis.from_url(...) as r:` — the client returns
# itself on enter so the configured side-effects are what the caller uses.
mock.__aenter__ = AsyncMock(return_value=mock)
mock.__aexit__ = AsyncMock(return_value=False)
mock._store = store
return mock
def _make_orchestrator() -> AgentOrchestrator:
"""Build a minimal orchestrator via __new__ (no __init__ side-effects)."""
orch = AgentOrchestrator.__new__(AgentOrchestrator)
orch._running = True
orch._waiting_records = {}
orch._instances = {}
orch._rate_limit_ceo_notified = set()
return orch
def _make_tracker_mock(failure_return: int = 1) -> AsyncMock:
"""Create an async mock RateLimitStateTracker instance."""
mock = AsyncMock()
mock.clear = AsyncMock()
mock.increment_probe_failures = AsyncMock(return_value=failure_return)
mock.reset_probe_failures = AsyncMock()
return mock
def _make_active_state(
_provider: str = "anthropic",
retry_after: float | None = None,
probe_failures: int = 0,
activated_at: datetime | None = None,
) -> dict[str, Any]:
"""Build a tracker state dict."""
at = activated_at or datetime.now(UTC)
return {
"rate_limited": True,
"activated_at": at.isoformat(),
"retry_after": retry_after,
"affected_agents": ["be-dev-1"],
"probe_failures": probe_failures,
}
def _waiting_record(
agent_id: str,
provider: str = "anthropic",
task_id: str | None = None,
) -> WaitingRecord:
return WaitingRecord(
agent_id=agent_id,
task_id=task_id or str(uuid4()),
waiting_for="rate_limit_lifted",
waiting_since=datetime.now(UTC),
context={"provider": provider},
)
# ---------------------------------------------------------------------------
# Tests: probe-success path
# ---------------------------------------------------------------------------
class TestProbeSuccessPath:
"""When _do_probe returns True the rate limit should be cleared and
all parked agents resolved."""
async def test_tracker_clear_called_on_success(self) -> None:
"""tracker.clear() is invoked when the probe succeeds."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock()
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "resolve_wait", new=AsyncMock(return_value=None)),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=True)),
patch("roboco.events.get_event_bus") as mock_bus_fn,
):
bus_mock = AsyncMock()
bus_mock.publish = AsyncMock()
mock_bus_fn.return_value = bus_mock
await orch._probe_one_provider(provider, state)
tracker_mock.clear.assert_awaited_once()
async def test_resolve_wait_called_for_parked_agents(self) -> None:
"""resolve_wait is called for each agent waiting for rate_limit_lifted."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
agent1 = "be-dev-1"
agent2 = "be-dev-2"
orch._waiting_records = {
agent1: _waiting_record(agent1, provider),
agent2: _waiting_record(agent2, provider),
"be-qa-1": _waiting_record(
"be-qa-1", "other-provider"
), # different provider
}
resolve_mock = AsyncMock(return_value=None)
tracker_mock = _make_tracker_mock()
with (
patch.object(orch, "resolve_wait", new=resolve_mock),
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=True)),
patch("roboco.events.get_event_bus") as mock_bus_fn,
):
bus_mock = AsyncMock()
bus_mock.publish = AsyncMock()
mock_bus_fn.return_value = bus_mock
await orch._probe_one_provider(provider, state)
# Only the two anthropic-parked agents should be resolved
assert resolve_mock.await_count == 2 # noqa: PLR2004
resolved_ids = {call.args[0] for call in resolve_mock.call_args_list}
assert agent1 in resolved_ids
assert agent2 in resolved_ids
assert "be-qa-1" not in resolved_ids
async def test_rate_limit_lifted_event_published(self) -> None:
"""RATE_LIMIT_LIFTED event is published to the bus on probe success."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock()
published_events: list[Any] = []
with (
patch.object(orch, "resolve_wait", new=AsyncMock(return_value=None)),
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=True)),
patch("roboco.events.get_event_bus") as mock_bus_fn,
):
bus_mock = AsyncMock()
bus_mock.publish = AsyncMock(side_effect=published_events.append)
mock_bus_fn.return_value = bus_mock
await orch._probe_one_provider(provider, state)
assert len(published_events) == 1
event = published_events[0]
assert event.type == EventType.RATE_LIMIT_LIFTED
assert event.data["provider"] == provider
async def test_ceo_notified_flag_cleared_on_success(self) -> None:
"""_rate_limit_ceo_notified is cleared when probe succeeds."""
orch = _make_orchestrator()
provider = "anthropic"
orch._rate_limit_ceo_notified.add(provider) # simulates prior episode
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock()
with (
patch.object(orch, "resolve_wait", new=AsyncMock(return_value=None)),
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=True)),
patch("roboco.events.get_event_bus") as mock_bus_fn,
):
bus_mock = AsyncMock()
bus_mock.publish = AsyncMock()
mock_bus_fn.return_value = bus_mock
await orch._probe_one_provider(provider, state)
assert provider not in orch._rate_limit_ceo_notified
async def test_probe_skipped_before_estimated_lift_at(self) -> None:
"""When retry_after has not elapsed yet the probe is skipped entirely."""
orch = _make_orchestrator()
provider = "anthropic"
# Set activated_at to now; retry_after = 300s → estimated lift in future
state = _make_active_state(
provider,
retry_after=300.0,
activated_at=datetime.now(UTC),
)
probe_called: list[str] = []
async def fake_do_probe(_p: str) -> bool:
probe_called.append(_p)
return True
with patch.object(orch, "_do_probe", new=fake_do_probe):
await orch._probe_one_provider(provider, state)
assert probe_called == [] # probe was gated by time
# ---------------------------------------------------------------------------
# Tests: probe-failure path
# ---------------------------------------------------------------------------
class TestProbeFailurePath:
"""When _do_probe returns False the failure counter should be incremented."""
async def test_increment_probe_failures_called_on_failure(self) -> None:
"""increment_probe_failures is called when the probe fails."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock(failure_return=1)
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
patch.object(orch, "_notify_rate_limit_ceo", new=AsyncMock()),
):
await orch._probe_one_provider(provider, state)
tracker_mock.increment_probe_failures.assert_awaited_once()
async def test_clear_not_called_on_failure(self) -> None:
"""tracker.clear() must NOT be called when the probe fails."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock(failure_return=1)
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
patch.object(orch, "_notify_rate_limit_ceo", new=AsyncMock()),
):
await orch._probe_one_provider(provider, state)
tracker_mock.clear.assert_not_awaited()
# ---------------------------------------------------------------------------
# Tests: CEO notification threshold
# ---------------------------------------------------------------------------
class TestCEONotificationThreshold:
"""CEO notification fires at count==10 exactly once per episode."""
async def test_notification_fires_at_exactly_10_failures(self) -> None:
"""_notify_rate_limit_ceo is called when failure count hits 10."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
# simulate already at 9 failures; next increment returns 10
tracker_mock = _make_tracker_mock(failure_return=10)
notify_mock = AsyncMock()
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_notify_rate_limit_ceo", new=notify_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
):
await orch._probe_one_provider(provider, state)
notify_mock.assert_awaited_once()
async def test_notification_not_fired_before_threshold(self) -> None:
"""No CEO notification below threshold 10."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock(failure_return=9)
notify_mock = AsyncMock()
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_notify_rate_limit_ceo", new=notify_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
):
await orch._probe_one_provider(provider, state)
notify_mock.assert_not_awaited()
async def test_notification_sent_only_once_per_episode(self) -> None:
"""Even if failures keep accumulating, the CEO is notified only once."""
orch = _make_orchestrator()
provider = "anthropic"
state = _make_active_state(provider, retry_after=None)
# Mark this episode as already notified
orch._rate_limit_ceo_notified.add(provider)
tracker_mock = _make_tracker_mock(failure_return=15)
notify_mock = AsyncMock()
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_notify_rate_limit_ceo", new=notify_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
):
await orch._probe_one_provider(provider, state)
notify_mock.assert_not_awaited()
async def test_new_episode_allows_new_notification(self) -> None:
"""After a rate-limit clears (success) a new episode starts fresh."""
orch = _make_orchestrator()
provider = "anthropic"
# Episode 1: had a notification
orch._rate_limit_ceo_notified.add(provider)
success_state = _make_active_state(provider, retry_after=None)
tracker_mock = _make_tracker_mock(failure_return=10)
notify_mock = AsyncMock()
with (
patch.object(orch, "resolve_wait", new=AsyncMock(return_value=None)),
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_notify_rate_limit_ceo", new=notify_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=True)),
patch("roboco.events.get_event_bus") as mock_bus_fn,
):
bus_mock = AsyncMock()
bus_mock.publish = AsyncMock()
mock_bus_fn.return_value = bus_mock
# Success clears the episode flag
await orch._probe_one_provider(provider, success_state)
assert provider not in orch._rate_limit_ceo_notified
# Episode 2: simulate a new failure reaching threshold 10
failure_state = _make_active_state(provider, retry_after=None)
with (
patch.object(orch, "_make_tracker", return_value=tracker_mock),
patch.object(orch, "_notify_rate_limit_ceo", new=notify_mock),
patch.object(orch, "_do_probe", new=AsyncMock(return_value=False)),
):
await orch._probe_one_provider(provider, failure_state)
# Notification SHOULD fire for the new episode
notify_mock.assert_awaited_once()
# ---------------------------------------------------------------------------
# Tests: list_rate_limited_providers
# ---------------------------------------------------------------------------
class TestListRateLimitedProviders:
"""list_rate_limited_providers scans Redis for active rate-limit keys."""
async def test_returns_empty_when_no_keys(self) -> None:
redis_mock = _make_redis_mock()
with patch("redis.asyncio.from_url", return_value=redis_mock):
result = await RateLimitStateTracker.list_rate_limited_providers()
assert result == []
async def test_returns_active_provider(self) -> None:
state = {
"rate_limited": True,
"activated_at": datetime.now(UTC).isoformat(),
"retry_after": 60.0,
"affected_agents": ["be-dev-1"],
"probe_failures": 0,
}
store = {"roboco:rate_limit:anthropic:state": json.dumps(state).encode()}
redis_mock = _make_redis_mock(store)
with patch("redis.asyncio.from_url", return_value=redis_mock):
result = await RateLimitStateTracker.list_rate_limited_providers()
assert len(result) == 1
provider, returned_state = result[0]
assert provider == "anthropic"
assert returned_state["rate_limited"] is True
async def test_ignores_cleared_providers(self) -> None:
state = {
"rate_limited": False,
"activated_at": datetime.now(UTC).isoformat(),
"retry_after": 60.0,
"affected_agents": [],
"probe_failures": 2,
}
store = {"roboco:rate_limit:anthropic:state": json.dumps(state).encode()}
redis_mock = _make_redis_mock(store)
with patch("redis.asyncio.from_url", return_value=redis_mock):
result = await RateLimitStateTracker.list_rate_limited_providers()
assert result == []
# ---------------------------------------------------------------------------
# Tests: GET /api/system/rate-limits endpoint schema
# ---------------------------------------------------------------------------
class TestRateLimitsEndpoint:
"""GET /api/system/rate-limits returns correct schema."""
async def test_returns_empty_list_when_no_rate_limits(self) -> None:
app = create_app()
with patch(
"roboco.api.routes.system.RateLimitStateTracker"
".list_rate_limited_providers",
new_callable=AsyncMock,
return_value=[],
):
async with AsyncClient(
transport=ASGITransport(app=app), base_url="http://test"
) as client:
resp = await client.get("/api/system/rate-limits")
assert resp.status_code == _HTTP_OK
assert resp.json() == {"entries": []}
async def test_returns_provider_state_when_rate_limited(self) -> None:
app = create_app()
retry_after = 60.0
state = {
"rate_limited": True,
"activated_at": "2026-06-11T00:00:00+00:00",
"retry_after": retry_after,
"affected_agents": ["be-dev-1"],
"probe_failures": 3,
}
with patch(
"roboco.api.routes.system.RateLimitStateTracker"
".list_rate_limited_providers",
new_callable=AsyncMock,
return_value=[("anthropic", state)],
):
async with AsyncClient(
transport=ASGITransport(app=app), base_url="http://test"
) as client:
resp = await client.get("/api/system/rate-limits")
assert resp.status_code == _HTTP_OK
entries = resp.json()["entries"]
assert len(entries) == 1
entry = entries[0]
# Panel-shaped, camelCase fields (not the raw Redis state).
assert entry["provider"] == "anthropic"
assert entry["affectedAgents"] == ["be-dev-1"]
assert entry["hitAt"] == "2026-06-11T00:00:00+00:00"
assert entry["retryAfterSeconds"] == retry_after
assert entry["resumeAt"] == "2026-06-11T00:01:00+00:00"
async def test_endpoint_not_404(self) -> None:
"""The endpoint must be registered in app.py — no 404."""
app = create_app()
with patch(
"roboco.api.routes.system.RateLimitStateTracker"
".list_rate_limited_providers",
new_callable=AsyncMock,
return_value=[],
):
async with AsyncClient(
transport=ASGITransport(app=app), base_url="http://test"
) as client:
resp = await client.get("/api/system/rate-limits")
assert resp.status_code != _HTTP_NOT_FOUND
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