From 9afac6899538ef27976e2ce54dd3545d11e0cec8 Mon Sep 17 00:00:00 2001 From: ryan Date: Wed, 16 Sep 2026 01:43:04 +0000 Subject: [PATCH] test(router): cover _register_router_selector and _replace_routing_groups directly Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> --- .../test_router_routing_groups.py | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/tests/test_litellm/router_strategy/test_router_routing_groups.py b/tests/test_litellm/router_strategy/test_router_routing_groups.py index 99230c1f71c..506563a82fb 100644 --- a/tests/test_litellm/router_strategy/test_router_routing_groups.py +++ b/tests/test_litellm/router_strategy/test_router_routing_groups.py @@ -919,6 +919,53 @@ def test_unbuildable_group_selector_keeps_previous_groups(monkeypatch): assert litellm.input_callback == [] +def test_register_router_selector_wires_only_the_hooks_the_strategy_needs(monkeypatch): + monkeypatch.setattr(litellm, "callbacks", []) + monkeypatch.setattr(litellm, "input_callback", []) + router = _build_router() + least_busy = router._build_strategy_selector( + strategy="least-busy", routing_strategy_args={}, register_callbacks=False + ) + latency = router._build_strategy_selector( + strategy="latency-based-routing", routing_strategy_args={}, register_callbacks=False + ) + assert least_busy is not None and latency is not None + assert litellm.callbacks == [] and litellm.input_callback == [] + + router._register_router_selector(least_busy) + router._register_router_selector(latency) + + assert [cb for cb in litellm.callbacks if cb is least_busy or cb is latency] == [least_busy, latency] + assert litellm.input_callback == [least_busy] + + +def test_replace_routing_groups_swaps_state_and_callbacks_in_one_step(monkeypatch): + monkeypatch.setattr(litellm, "callbacks", []) + monkeypatch.setattr(litellm, "input_callback", []) + router = _build_router(routing_groups=_single_latency_group()) + old_selector = router._group_selectors["g1"]["latency-based-routing"] + new_selector = router._build_strategy_selector( + strategy="least-busy", routing_strategy_args={}, register_callbacks=False + ) + assert new_selector is not None + + router._replace_routing_groups( + ( + (RoutingGroup(group_name="g2", models=["other-model"], routing_strategy="least-busy"), new_selector), + (RoutingGroup(group_name="g3", models=["other-model-2"], routing_strategy="simple-shuffle"), None), + ) + ) + + assert list(router._routing_groups) == ["g2", "g3"] + assert router._model_to_group == {"other-model": "g2", "other-model-2": "g3"} + assert router._group_selectors == {"g2": {"least-busy": new_selector}, "g3": {}} + assert router._get_routing_context("other-model", None) == ("least-busy", new_selector) + assert router._get_routing_context("filtered-model", None)[0] == router.routing_strategy + assert all(cb is not old_selector for cb in litellm.callbacks) + assert sum(1 for cb in litellm.callbacks if cb is new_selector) == 1 + assert litellm.input_callback == [new_selector] + + def test_override_selectors_are_not_registered_process_wide(monkeypatch): monkeypatch.setattr(litellm, "callbacks", []) monkeypatch.setattr(litellm, "input_callback", [])