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group_fqcd_jr/tests/unit/service/test_dependency_degradation.py
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Python

from unittest.mock import AsyncMock
import pytest
from app.service.relationship_service import GraphDegradedResult, RelationshipService
class FailingGraph:
async def execute_query(self, query: str, **parameters: object) -> list[object]:
raise TimeoutError("neo4j timeout")
@pytest.mark.asyncio
async def test_neo4j_timeout_returns_explicit_degraded_result() -> None:
result = await RelationshipService(FailingGraph()).neighbors(1, "HOLDS")
assert len(result) == 1
assert isinstance(result[0], GraphDegradedResult)
assert result[0].degraded is True
@pytest.mark.asyncio
async def test_neo4j_rejects_unapproved_relationship() -> None:
with pytest.raises(ValueError, match="not allowed"):
await RelationshipService(FailingGraph()).neighbors(1, "DELETE_ALL")
@pytest.mark.asyncio
async def test_product_graph_context_degrades_without_fabricating_relationships() -> None:
result = await RelationshipService(FailingGraph()).product_context(1)
assert result["degraded"] is True
assert "industries" not in result
@pytest.mark.asyncio
async def test_portfolio_industry_context_returns_only_shared_relationship_evidence() -> None:
class Graph:
def __init__(self) -> None:
self.query = ""
self.parameters: dict[str, object] = {}
async def execute_query(self, query: str, **parameters: object) -> list[object]:
self.query = query
self.parameters = parameters
return [{"industry_name": "科技", "product_count": 2}]
graph = Graph()
result = await RelationshipService(graph).portfolio_industry_context(7, limit=50)
assert result == {
"degraded": False,
"overlaps": [{"industry_name": "科技", "product_count": 2}],
}
assert "[:HOLDS]" in graph.query
assert "[:EXPOSED_TO_INDUSTRY]" in graph.query
assert graph.parameters == {"customer_id": 7, "limit": 20}
@pytest.mark.asyncio
async def test_portfolio_industry_context_explicitly_degrades() -> None:
result = await RelationshipService(FailingGraph()).portfolio_industry_context(7)
assert result == {"degraded": True, "reason": "neo4j_unavailable:TimeoutError"}
@pytest.mark.asyncio
async def test_model_router_excludes_unhealthy_endpoint() -> None:
from app.model.configuration import ModelEndpointConfig
from app.service.model_router_service import ModelRouterService
primary = ModelEndpointConfig(
id=1,
endpoint_code="primary",
provider="x",
model_name="m1",
base_url="http://x",
secret_ref="secret://one",
capabilities=["chat"],
status="active",
timeout_ms=1000,
)
fallback = ModelEndpointConfig(
id=2,
endpoint_code="fallback",
provider="x",
model_name="m2",
base_url="http://y",
secret_ref="secret://two",
capabilities=["chat"],
status="active",
timeout_ms=1000,
)
session = AsyncMock()
session.scalars.return_value = [primary, fallback]
router = ModelRouterService(session)
router.mark_health("primary", False)
selected = await router.select_with_fallback(
agent_type="customer_service", task_type="chat", fallback_codes=["primary", "fallback"]
)
assert [endpoint.endpoint_code for endpoint in selected] == ["fallback"]