wehub-resource-sync
223 lines
7.4 KiB
Python
223 lines
7.4 KiB
Python
"""Failover must realign routed_model telemetry to the model that runs.
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Same invariant the explicit-model override realignment enforces
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(prompt_assembler_stage, commit 966df982): ``metadata["routed_model"]`` is
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read by RouterDecisionEvent and comprehensive-savings pricing, so after a
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selector failover it must name the fallback model, and route-savings figures
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computed for the abandoned model no longer apply.
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"""
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from __future__ import annotations
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from collections.abc import AsyncIterator
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from types import SimpleNamespace
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from typing import Any
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from opensquilla.engine.pipeline import TurnContext
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from opensquilla.engine.runtime import TurnRunner, _SelectorFallbackProvider
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from opensquilla.engine.types import DoneEvent as EngineDoneEvent
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from opensquilla.engine.types import RouterDecisionEvent
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from opensquilla.provider import DoneEvent, ErrorEvent, TextDeltaEvent
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from opensquilla.tools.types import CallerKind, ToolContext
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class _StubSelector:
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def __init__(self, fallback_model: str) -> None:
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self._fallback_model = fallback_model
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def next_fallback_after_failure(self, exc: Exception) -> object:
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return object()
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@property
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def current_config(self) -> SimpleNamespace:
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return SimpleNamespace(model=self._fallback_model)
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def test_fallback_realigns_routed_model_and_drops_savings() -> None:
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metadata: dict[str, object] = {
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"routed_model": "expensive/model",
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"savings_pct": 12.5,
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"savings_max_price_per_m": 3.0,
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"savings_routed_price_per_m": 0.5,
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}
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wrapper = _SelectorFallbackProvider(
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object(),
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_StubSelector("cheap/fallback"),
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turn_metadata=metadata,
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)
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assert wrapper.fallback_after_invalid_response("upstream 503") is True
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assert metadata["routed_model"] == "cheap/fallback"
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assert metadata["savings_pct"] == 0.0
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assert metadata["savings_max_price_per_m"] == 0.0
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assert metadata["savings_routed_price_per_m"] == 0.0
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def test_fallback_to_same_model_keeps_savings() -> None:
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metadata: dict[str, object] = {"routed_model": "same/model", "savings_pct": 7.0}
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wrapper = _SelectorFallbackProvider(
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object(),
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_StubSelector("same/model"),
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turn_metadata=metadata,
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)
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assert wrapper.fallback_after_invalid_response("upstream 503") is True
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assert metadata["routed_model"] == "same/model"
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assert metadata["savings_pct"] == 7.0
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def test_fallback_without_metadata_is_noop() -> None:
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wrapper = _SelectorFallbackProvider(object(), _StubSelector("any/model"))
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assert wrapper.fallback_after_invalid_response("upstream 503") is True
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PRIMARY_MODEL = "routed-primary"
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FALLBACK_MODEL = "fallback-secondary"
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class _ChainProvider:
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"""Scripted provider link: either fails pre-content or streams a reply."""
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provider_name = "openrouter"
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def __init__(self, model: str, *, fail: bool) -> None:
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self._model = model
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self._fail = fail
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async def chat(
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self,
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messages: list[Any],
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tools: Any = None,
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config: Any = None,
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) -> AsyncIterator[Any]:
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if self._fail:
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yield ErrorEvent(message="HTTP 404: model not found", code="404")
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return
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yield TextDeltaEvent(text=f"answer-from:{self._model}")
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yield DoneEvent(model=self._model, input_tokens=3, output_tokens=2)
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async def list_models(self) -> list[Any]:
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return []
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class _ChainSelector:
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"""Two-link chain selector: primary fails, one fallback hop remains."""
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def __init__(self, *, primary_fails: bool) -> None:
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self._primary_fails = primary_fails
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self.current_config = SimpleNamespace(model=PRIMARY_MODEL)
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def clone(self) -> _ChainSelector:
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return self
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def override_model(self, model: str) -> None:
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self.current_config = SimpleNamespace(model=model)
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def resolve(self) -> _ChainProvider:
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return _ChainProvider(PRIMARY_MODEL, fail=self._primary_fails)
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def next_fallback_after_failure(self, exc: Exception) -> _ChainProvider:
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self.current_config = SimpleNamespace(model=FALLBACK_MODEL)
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return _ChainProvider(FALLBACK_MODEL, fail=False)
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def _routed_pipeline_fake(routed_model: str) -> Any:
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async def routed_pipeline(
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self: TurnRunner,
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message: str,
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session_key: str,
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provider: Any,
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cloned_selector: Any,
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tool_defs: list[Any],
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base_prompt: str | tuple[str, str],
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attachments: list[dict[str, Any]],
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**_: Any,
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) -> tuple[TurnContext, Any]:
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return (
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TurnContext(
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message=message,
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session_key=session_key,
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config=self._config,
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provider=provider,
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model=routed_model,
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tool_defs=tool_defs,
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system_prompt=base_prompt,
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attachments=attachments,
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metadata={
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"routed_tier": "c1",
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"routed_model": routed_model,
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"baseline_model": "baseline-expensive",
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"routing_source": "router",
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"routing_confidence": 0.9,
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"savings_pct": 41.0,
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"savings_max_price_per_m": 3.0,
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"savings_routed_price_per_m": 0.5,
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},
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),
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provider,
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)
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return routed_pipeline
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async def _run_turn_events(
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monkeypatch: Any,
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*,
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primary_fails: bool,
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) -> list[Any]:
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monkeypatch.setattr(TurnRunner, "_run_pipeline", _routed_pipeline_fake(PRIMARY_MODEL))
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runner = TurnRunner(provider_selector=_ChainSelector(primary_fails=primary_fails))
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return [
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event
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async for event in runner.run(
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"hi",
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"agent:main:selector-fallback-e2e",
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tool_context=ToolContext(is_owner=True, caller_kind=CallerKind.CLI),
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history_has_persisted_user=False,
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no_memory_capture=True,
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)
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]
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async def test_precontent_fallback_emits_corrective_router_decision_before_done(
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monkeypatch: Any,
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) -> None:
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events = await _run_turn_events(monkeypatch, primary_fails=True)
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router_events = [event for event in events if isinstance(event, RouterDecisionEvent)]
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assert len(router_events) == 2
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initial, corrective = router_events
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assert initial.model == PRIMARY_MODEL
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assert initial.source == "router"
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assert initial.fallback is False
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assert corrective.model == FALLBACK_MODEL
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assert corrective.source == "fallback"
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assert corrective.fallback is True
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assert corrective.savings_pct == 0.0
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done_events = [event for event in events if isinstance(event, EngineDoneEvent)]
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assert len(done_events) == 1
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assert done_events[0].model == FALLBACK_MODEL
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assert done_events[0].routed_model == FALLBACK_MODEL
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assert events.index(corrective) < events.index(done_events[0])
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async def test_turn_without_fallback_hop_emits_exactly_one_router_decision(
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monkeypatch: Any,
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) -> None:
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events = await _run_turn_events(monkeypatch, primary_fails=False)
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router_events = [event for event in events if isinstance(event, RouterDecisionEvent)]
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assert len(router_events) == 1
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assert router_events[0].model == PRIMARY_MODEL
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assert router_events[0].source == "router"
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assert router_events[0].fallback is False
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done_events = [event for event in events if isinstance(event, EngineDoneEvent)]
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assert len(done_events) == 1
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assert done_events[0].model == PRIMARY_MODEL
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