fix(sector-radar): 收紧可复现发布契约

zhixing-server/tests/test_sector_radar_http.py

@@ -2,7 +2,9 @@ from dataclasses import replace
 from datetime import UTC, date, datetime, timedelta
 from decimal import Decimal
 
+import pytest
 from fastapi.testclient import TestClient
+from pydantic import ValidationError
 
 from zhixing_server.bootstrap.app import create_app
 from zhixing_server.modules.sector_radar.application.read import (
@@ -29,6 +31,7 @@ from zhixing_server.modules.sector_radar.infrastructure.postgres import (
     SectorRadarRepositoryError,
 )
 from zhixing_server.modules.sector_radar.presentation.http import (
+    RadarRankingRowResponse,
     get_sector_radar_reader,
 )
 
@@ -191,6 +194,14 @@ def test_no_data_is_a_stable_200_response() -> None:
     assert rankings.json()["rows"] == []
 
 
+def test_http_contract_rejects_zero_rank_percentile() -> None:
+    payload = _client(FakeReader()).get("/api/v1/sector-radar/rankings").json()["rows"][0]
+    payload["rank_percentile"] = "0"
+
+    with pytest.raises(ValidationError):
+        RadarRankingRowResponse.model_validate(payload)
+
+
 def test_invalid_query_values_return_422() -> None:
     client = _client(FakeReader())