feat(auth): APIKeyAuthBackend resolves token to SA principal (Stage 1 PR2)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/tests/test_api_key_backend.py

@@ -7,6 +7,9 @@ import dataclasses
 import pytest
 
 from app.gateway.auth.api_key_backend import ServicePrincipal, parse_scopes
+from deerflow.auth.tokens import generate_api_key
+
+pytestmark = pytest.mark.anyio
 
 
 def test_parse_scopes_splits_and_strips():
@@ -32,3 +35,93 @@ def test_service_principal_is_frozen():
     p = ServicePrincipal(id="sa-1")
     with pytest.raises(dataclasses.FrozenInstanceError):
         p.id = "other"  # type: ignore[misc]
+
+
+@pytest.fixture
+def anyio_backend() -> str:
+    return "asyncio"
+
+
+async def _setup_backend(tmp_path, *, sa_status="active", ws_status="active", scopes="threads:read", expires_at=None, revoke=False):
+    from app.gateway.auth.api_key_backend import APIKeyAuthBackend
+    from deerflow.persistence.api_key import ApiKeyRepository
+    from deerflow.persistence.engine import get_session_factory, init_engine
+    from deerflow.persistence.service_account import ServiceAccountRepository
+    from deerflow.persistence.service_account.model import ServiceAccountRow
+    from deerflow.persistence.user.model import UserRow
+    from deerflow.persistence.workspace import WorkspaceRepository
+    from deerflow.persistence.workspace.model import WorkspaceRow
+
+    url = f"sqlite+aiosqlite:///{tmp_path / 'test.db'}"
+    await init_engine("sqlite", url=url, sqlite_dir=str(tmp_path))
+    sf = get_session_factory()
+    async with sf() as session:
+        session.add(UserRow(id="u-alice", email="alice@example.com"))
+        await session.commit()
+    async with sf() as session:
+        session.add(WorkspaceRow(id="w-1", name="WS", slug="ws", owner_id="u-alice", status=ws_status))
+        await session.commit()
+    async with sf() as session:
+        session.add(ServiceAccountRow(id="sa-1", workspace_id="w-1", name="bot", role="member", identity_mode="collapsed", status=sa_status, created_by="u-alice"))
+        await session.commit()
+
+    api_key_repo = ApiKeyRepository(sf)
+    gen = generate_api_key("live")
+    created = await api_key_repo.create(service_account_id="sa-1", key_prefix=gen.prefix, key_hash=gen.key_hash, name="k", scopes=scopes, expires_at=expires_at)
+    if revoke:
+        await api_key_repo.revoke(created["id"])
+
+    backend = APIKeyAuthBackend(api_key_repo=api_key_repo, service_account_repo=ServiceAccountRepository(sf), workspace_repo=WorkspaceRepository(sf))
+    return backend, gen
+
+
+async def _cleanup():
+    from deerflow.persistence.engine import close_engine
+
+    await close_engine()
+
+
+async def test_authenticate_valid_key(tmp_path):
+    backend, gen = await _setup_backend(tmp_path, scopes="threads:read,threads:write")
+    try:
+        result = await backend.authenticate(gen.plaintext)
+        assert result is not None
+        assert result.principal.id == "sa-1"
+        assert result.principal.is_service_account is True
+        assert result.workspace_id == "w-1"
+        assert result.role == "member"
+        assert result.permissions == ["threads:read", "threads:write"]
+    finally:
+        await _cleanup()
+
+
+async def test_authenticate_unknown_token_returns_none(tmp_path):
+    backend, _ = await _setup_backend(tmp_path)
+    try:
+        assert await backend.authenticate("dfk_live_doesnotexist000000000000") is None
+    finally:
+        await _cleanup()
+
+
+async def test_authenticate_revoked_key_returns_none(tmp_path):
+    backend, gen = await _setup_backend(tmp_path, revoke=True)
+    try:
+        assert await backend.authenticate(gen.plaintext) is None
+    finally:
+        await _cleanup()
+
+
+async def test_authenticate_suspended_sa_returns_none(tmp_path):
+    backend, gen = await _setup_backend(tmp_path, sa_status="suspended")
+    try:
+        assert await backend.authenticate(gen.plaintext) is None
+    finally:
+        await _cleanup()
+
+
+async def test_authenticate_suspended_workspace_returns_none(tmp_path):
+    backend, gen = await _setup_backend(tmp_path, ws_status="suspended")
+    try:
+        assert await backend.authenticate(gen.plaintext) is None
+    finally:
+        await _cleanup()