feat(persistence): ExternalUserRepository scaffold (Stage 1 PR1)

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

backend/tests/test_external_user_repo.py

@@ -0,0 +1,77 @@
+"""Tests for ExternalUserRepository (Stage 1 PR1).
+
+Repository is built but not yet wired to any auth path. upsert is
+idempotent on (service_account_id, external_id) per the table's
+UniqueConstraint uq_external_users_sa_external.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from deerflow.persistence.external_user import ExternalUserRepository
+from deerflow.persistence.service_account.model import ServiceAccountRow
+from deerflow.persistence.user.model import UserRow
+from deerflow.persistence.workspace.model import WorkspaceRow
+
+pytestmark = pytest.mark.anyio
+
+
+@pytest.fixture
+def anyio_backend() -> str:
+    return "asyncio"
+
+
+async def _make_repo(tmp_path):
+    from deerflow.persistence.engine import get_session_factory, init_engine
+
+    url = f"sqlite+aiosqlite:///{tmp_path / 'test.db'}"
+    await init_engine("sqlite", url=url, sqlite_dir=str(tmp_path))
+    return ExternalUserRepository(get_session_factory())
+
+
+async def _cleanup():
+    from deerflow.persistence.engine import close_engine
+
+    await close_engine()
+
+
+async def _seed_sa(repo) -> None:
+    async with repo._sf() as session:
+        session.add(UserRow(id="u-alice", email="alice@example.com"))
+        await session.commit()
+    async with repo._sf() as session:
+        session.add(WorkspaceRow(id="w-1", name="WS", slug="ws", owner_id="u-alice"))
+        await session.commit()
+    async with repo._sf() as session:
+        session.add(ServiceAccountRow(id="sa-1", workspace_id="w-1", name="bot", role="member", identity_mode="external_passthrough", status="active", created_by="u-alice"))
+        await session.commit()
+
+
+async def test_upsert_inserts_then_updates_same_row(tmp_path):
+    repo = await _make_repo(tmp_path)
+    try:
+        await _seed_sa(repo)
+        first = await repo.upsert(workspace_id="w-1", service_account_id="sa-1", external_id="ext-42", display_name="alice")
+        assert first["external_id"] == "ext-42"
+        assert first["last_seen_at"] is not None
+        second = await repo.upsert(workspace_id="w-1", service_account_id="sa-1", external_id="ext-42")
+        # same logical row (no duplicate)
+        assert second["id"] == first["id"]
+        rows = await repo.list_by_workspace("w-1")
+        assert len(rows) == 1
+    finally:
+        await _cleanup()
+
+
+async def test_get_by_external_id(tmp_path):
+    repo = await _make_repo(tmp_path)
+    try:
+        await _seed_sa(repo)
+        await repo.upsert(workspace_id="w-1", service_account_id="sa-1", external_id="ext-7")
+        found = await repo.get_by_external_id(service_account_id="sa-1", external_id="ext-7")
+        assert found is not None
+        assert found["external_id"] == "ext-7"
+        assert await repo.get_by_external_id(service_account_id="sa-1", external_id="nope") is None
+    finally:
+        await _cleanup()