Add test for dependency override in tag service

Author: borys25ol

tests/api/test_dependency_overrides.py

@@ -0,0 +1,35 @@
+import datetime
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from conduit.core.providers import get_tag_service
+from conduit.domain.dtos.tag import TagDTO
+
+
+class _TagServiceStub:
+    async def get_all_tags(self, *_: object, **__: object) -> list[TagDTO]:
+        return [
+            TagDTO(id=1, tag="override", created_at=datetime.datetime(2024, 1, 1)),
+            TagDTO(id=2, tag="stubbed", created_at=datetime.datetime(2024, 1, 2)),
+        ]
+
+
+@pytest.mark.anyio
+async def test_dependency_override_tag_service(application: FastAPI) -> None:
+    async def _override_tag_service() -> _TagServiceStub:
+        return _TagServiceStub()
+
+    application.dependency_overrides[get_tag_service] = _override_tag_service
+    try:
+        async with AsyncClient(
+            app=application,
+            base_url="http://testserver/api",
+            headers={"Content-Type": "application/json"},
+        ) as client:
+            response = await client.get(url="/tags")
+        assert response.status_code == 200
+        assert response.json() == {"tags": ["override", "stubbed"]}
+    finally:
+        application.dependency_overrides.pop(get_tag_service, None)