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routstr-core/tests/unit/test_algorithm.py
T

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"""Tests for the model prioritization algorithm."""
import os
from types import SimpleNamespace
from unittest.mock import Mock
import pytest
# Set required env vars before importing
os.environ["UPSTREAM_BASE_URL"] = "http://test"
os.environ["UPSTREAM_API_KEY"] = "test"
from routstr.algorithm import ( # noqa: E402
calculate_model_cost_score,
create_model_mappings,
get_provider_penalty,
)
from routstr.payment.models import Architecture, Model, Pricing # noqa: E402
def create_test_model(
model_id: str,
prompt_price: float = 0.001,
completion_price: float = 0.002,
request_price: float = 0.0,
) -> Model:
"""Helper to create a test model with given pricing."""
return Model(
id=model_id,
name=f"Test {model_id}",
created=1234567890,
description="Test model",
context_length=8192,
architecture=Architecture(
modality="text",
input_modalities=["text"],
output_modalities=["text"],
tokenizer="gpt",
instruct_type=None,
),
pricing=Pricing(
prompt=prompt_price,
completion=completion_price,
request=request_price,
image=0.0,
web_search=0.0,
internal_reasoning=0.0,
),
)
def create_test_provider(
name: str,
base_url: str = "http://test.com",
*,
db_id: int | None = None,
models: list[Model] | None = None,
upstream_name: str | None = None,
) -> Mock:
"""Helper to create a test provider mock."""
provider = Mock()
provider.provider_type = name
provider.base_url = base_url
provider.db_id = db_id
provider.upstream_name = upstream_name or name
provider.get_cached_models.return_value = models or []
return provider
def test_calculate_model_cost_score_basic() -> None:
"""Test basic cost calculation."""
model = create_test_model("test-model", prompt_price=0.001, completion_price=0.002)
cost = calculate_model_cost_score(model)
# Expected: (1000 tokens * 0.001) + (500 tokens * 0.002) = 0.001 + 0.001 = 0.002
assert cost == 0.002
def test_calculate_model_cost_score_with_request_fee() -> None:
"""Test cost calculation with request fee."""
model = create_test_model(
"test-model",
prompt_price=0.001,
completion_price=0.002,
request_price=0.0005,
)
cost = calculate_model_cost_score(model)
# Expected: 0.001 + 0.001 + 0.0005 = 0.0025
assert cost == 0.0025
def test_calculate_model_cost_score_expensive_model() -> None:
"""Test cost calculation for expensive model."""
model = create_test_model(
"expensive-model", prompt_price=0.03, completion_price=0.06
)
cost = calculate_model_cost_score(model)
# Expected: (1000 * 0.03) + (500 * 0.06) = 0.03 + 0.03 = 0.06
assert cost == 0.06
def test_get_provider_penalty_regular_provider() -> None:
"""Test penalty for regular provider."""
provider = create_test_provider("regular-provider", "http://provider.com")
penalty = get_provider_penalty(provider)
assert penalty == 1.0
def test_get_provider_penalty_openrouter() -> None:
"""Test penalty for OpenRouter."""
provider = create_test_provider("openrouter", "https://openrouter.ai/api/v1")
penalty = get_provider_penalty(provider)
assert penalty == 1.001
def test_create_model_mappings_includes_db_override_for_missing_cached_model(
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""Model overrides should still map when provider discovery misses the model."""
provider = create_test_provider(
"azure",
"https://example.openai.azure.com/openai/v1",
db_id=7,
models=[],
)
override_model = create_test_model("azure/gpt-4o")
override_model.canonical_slug = "azure-deployment"
def fake_row_to_model(*args, **kwargs) -> Model: # type: ignore[no-untyped-def]
return override_model
monkeypatch.setattr("routstr.payment.models._row_to_model", fake_row_to_model)
override_row = SimpleNamespace(id="azure/gpt-4o", upstream_provider_id=7, enabled=True)
model_instances, provider_map, unique_models = create_model_mappings(
upstreams=[provider],
overrides_by_key={("azure/gpt-4o", 7): (override_row, 1.01)},
disabled_model_keys=set(),
)
assert "azure/gpt-4o" in model_instances
assert [p for _, p in provider_map["azure/gpt-4o"]] == [provider]
assert "gpt-4o" in unique_models
def test_create_model_mappings_dedupes_with_provider_identity_not_provider_type(
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""Different provider instances of same type should both survive dedupe."""
provider_a_model = create_test_model(
"azure/gpt-4o", prompt_price=0.01, completion_price=0.01
)
provider_a = create_test_provider(
"azure",
"https://a.openai.azure.com/openai/v1",
db_id=1,
models=[provider_a_model],
upstream_name="azure-a",
)
provider_b = create_test_provider(
"azure",
"https://b.openai.azure.com/openai/v1",
db_id=2,
models=[],
upstream_name="azure-b",
)
override_model = create_test_model(
"azure/gpt-4o", prompt_price=0.001, completion_price=0.001
)
override_model.canonical_slug = "azure-b-deployment"
def fake_row_to_model(*args, **kwargs) -> Model: # type: ignore[no-untyped-def]
return override_model
monkeypatch.setattr("routstr.payment.models._row_to_model", fake_row_to_model)
override_row = SimpleNamespace(id="azure/gpt-4o", upstream_provider_id=2, enabled=True)
_, provider_map, _ = create_model_mappings(
upstreams=[provider_a, provider_b],
overrides_by_key={("azure/gpt-4o", 2): (override_row, 1.01)},
disabled_model_keys=set(),
)
providers_for_alias = [p for _, p in provider_map["azure/gpt-4o"]]
assert provider_a in providers_for_alias
assert provider_b in providers_for_alias
assert len(providers_for_alias) == 2
def test_create_model_mappings_applies_override_only_to_matching_provider(
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""Same-id overrides must not add provider-specific aliases to other providers."""
provider_a_model = create_test_model("same-id", prompt_price=0.01)
provider_a = create_test_provider(
"provider-a",
"https://provider-a.example/v1",
db_id=1,
models=[provider_a_model],
)
provider_b_model = create_test_model("same-id", prompt_price=0.02)
provider_b = create_test_provider(
"provider-b",
"https://provider-b.example/v1",
db_id=2,
models=[provider_b_model],
)
override_model = create_test_model("same-id", prompt_price=0.001)
override_model.alias_ids = ["provider-b-only"]
override_row = SimpleNamespace(id="same-id", upstream_provider_id=2, enabled=True)
def fake_row_to_model(*args, **kwargs) -> Model: # type: ignore[no-untyped-def]
return override_model
monkeypatch.setattr("routstr.payment.models._row_to_model", fake_row_to_model)
_, provider_map, _ = create_model_mappings(
upstreams=[provider_a, provider_b],
overrides_by_key={("same-id", 2): (override_row, 1.01)},
disabled_model_keys=set(),
)
assert [p for _, p in provider_map["provider-b-only"]] == [provider_b]
assert {p for _, p in provider_map["same-id"]} == {provider_a, provider_b}
def test_create_model_mappings_does_not_split_self_alias_from_base_identity(
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""A write-time self-alias must not advertise one shared model twice (#639)."""
model_id = "deepseek/deepseek-chat"
provider_a = create_test_provider(
"provider-a",
"https://provider-a.example/v1",
db_id=1,
models=[create_test_model(model_id)],
)
provider_b = create_test_provider(
"provider-b",
"https://provider-b.example/v1",
db_id=2,
models=[create_test_model(model_id)],
)
admin_saved_model = create_test_model(model_id)
admin_saved_model.forwarded_model_id = model_id
override_row = SimpleNamespace(id=model_id, upstream_provider_id=1, enabled=True)
def fake_row_to_model(*args, **kwargs) -> Model: # type: ignore[no-untyped-def]
return admin_saved_model
monkeypatch.setattr("routstr.payment.models._row_to_model", fake_row_to_model)
_, _, unique_models = create_model_mappings(
upstreams=[provider_a, provider_b],
overrides_by_key={(model_id, 1): (override_row, 1.0)},
disabled_model_keys=set(),
)
advertised_ids = sorted(
model.forwarded_model_id or model.id for model in unique_models.values()
)
assert advertised_ids == ["deepseek-chat"]
def test_create_model_mappings_disables_only_matching_provider() -> None:
"""Disabled overrides are scoped to the provider row, not the shared model id."""
provider_a = create_test_provider(
"provider-a",
"https://provider-a.example/v1",
db_id=1,
models=[create_test_model("same-id")],
)
provider_b = create_test_provider(
"provider-b",
"https://provider-b.example/v1",
db_id=2,
models=[create_test_model("same-id")],
)
_, provider_map, _ = create_model_mappings(
upstreams=[provider_a, provider_b],
overrides_by_key={},
disabled_model_keys={("same-id", 2)},
)
assert [p for _, p in provider_map["same-id"]] == [provider_a]