优化系统健康评分与缓存监测

backend/tests/test_permission_monitoring_api.py

@@ -258,9 +258,14 @@ async def test_permission_system_health_degraded(db_session):
     assert "status" in data
     assert "health_score" in data
     assert "issues" in data
-    assert "权限检查响应时间过长" in data["issues"]
-    assert "权限拒绝率过高" in data["issues"]
-    assert "缓存命中率过低" in data["issues"]
+    assert any("权限检查平均响应时间过长" in issue for issue in data["issues"])
+    assert any("权限拒绝率偏高" in issue for issue in data["issues"])
+    assert any("缓存命中率偏低" in issue for issue in data["issues"])
+    assert data["status"] == "unhealthy"
+    assert data["health_score"] == 30
+    assert data["score_breakdown"]["performance"]["deduction"] == 25
+    assert data["score_breakdown"]["deny_rate"]["deduction"] == 20
+    assert data["score_breakdown"]["cache"]["deduction"] == 25
 
 
 @pytest.mark.asyncio
@@ -272,10 +277,33 @@ async def test_permission_system_health_includes_metrics(db_session):
     data = await permission_monitoring.permission_system_health(db=db_session, _=AdminUserStub())
     assert "last_hour" in data
     assert "cache_stats" in data
+    assert "score_breakdown" in data
+    assert "sample_sufficient" in data
     assert "total_checks" in data["last_hour"]
     assert "cache_metrics" in data["cache_stats"]
 
 
+@pytest.mark.asyncio
+async def test_permission_system_health_ignores_small_cache_sample(db_session):
+    """缓存样本不足时不应因为低命中率扣分"""
+    monitor = PermissionMonitor()
+    set_permission_monitor(monitor)
+
+    for _ in range(3):
+        monitor.record_cache_miss()
+
+    data = await permission_monitoring.permission_system_health(db=db_session, _=AdminUserStub())
+
+    assert data["score_breakdown"]["cache"]["sample_sufficient"] is False
+    assert data["score_breakdown"]["cache"]["deduction"] == 0
+    non_cache_deductions = sum(
+        item["deduction"]
+        for name, item in data["score_breakdown"].items()
+        if name != "cache"
+    )
+    assert data["health_score"] == 100 - non_cache_deductions
+
+
 @pytest.mark.asyncio
 async def test_ip_locations_counts_unique_users_per_location(db_session, monkeypatch):
     """IP 属地统计应按省市聚合访问次数、来源 IP 数和访问用户数。"""