fix: 无本地同地区基准时自相关通过并记为零

backend/tests/test_alpha_management.py

@@ -353,3 +353,40 @@ async def test_scoped_date_query_parameters_and_no_platform_check(settings):
     assert "status!" in second and second["hidden"] == "true"
     assert all(r.method == "GET" and r.url.path == "/users/self/alphas" for r in requests)
     await client.close()
+
+
+@pytest.mark.parametrize("region", ["USA", None])
+async def test_empty_region_reference_set_passes_with_zero_but_missing_region_does_not(
+    app, logged_in, region
+):
+    runner = app.state.runner  # No credentials or PnL; this branch must stay local.
+    async with runner.sessions.begin() as db:
+        for raw in (
+            alpha("target", settings={"region": region}),
+            alpha("pending", settings={"region": "USA"}),
+            alpha("other-region", status="ACTIVE", settings={"region": "CHN"}),
+        ):
+            await upsert_alpha(db, raw)
+    job = (
+        await logged_in.post(
+            f"{PREFIX}/sync-jobs", json={"kind": "self_correlation", "alpha_ids": ["target"]}
+        )
+    ).json()
+    await runner.execute(job["id"])
+    assert (await result(runner, job["id"])).status == "completed"
+    report = (await logged_in.get(f"{PREFIX}/alphas/target/self-correlation")).json()["result"]
+    assert report["candidate_count"] == report["compared_count"] == report["skipped_count"] == 0
+    assert report["status"] == ("low" if region else "insufficient_data")
+    assert report["max_correlation"] == (0.0 if region else None)
+    assert not report["stale"] and report["matches"] == []
+    summary = (await logged_in.get(f"{PREFIX}/alphas?q=target")).json()["items"][0]["local_correlation"]
+    assert summary["status"] == report["status"]
+    assert summary["max_correlation"] == report["max_correlation"]
+    state = (await logged_in.get(f"{PREFIX}/alphas/target/submission")).json()
+    assert state["can_check"] is bool(region)
+    if region:
+        async with runner.sessions.begin() as db:
+            await upsert_alpha(db, alpha("new-peer", status="ACTIVE"))
+        report = (await logged_in.get(f"{PREFIX}/alphas/target/self-correlation")).json()["result"]
+        assert report["stale"]
+        assert not (await logged_in.get(f"{PREFIX}/alphas/target/submission")).json()["can_check"]