feat: configurable traffic threshold and Feishu bot alerts

backend/internal/trafficmgr/alerts_test.go

@@ -0,0 +1,30 @@
+package trafficmgr
+
+import (
+	"testing"
+	"time"
+
+	"vpn-platform/backend/internal/alertnotify"
+	"vpn-platform/backend/internal/model"
+	"vpn-platform/backend/internal/store"
+)
+
+func TestConfigurableRateThreshold(t *testing.T) {
+	if err := store.Init(t.TempDir()); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := alertnotify.Save(alertnotify.Input{RateThresholdMbps: 80}); err != nil {
+		t.Fatal(err)
+	}
+	if CheckRateAbnormal(1, 100*1024*1024, 0, 15*time.Second) {
+		t.Fatal("below 80 Mbps should not alert")
+	}
+	if !CheckRateAbnormal(1, 200*1024*1024, 0, 15*time.Second) {
+		t.Fatal("above 80 Mbps should alert")
+	}
+	var count int64
+	store.DB.Model(&model.ConnectionLog{}).Where("event = ?", "rate_alert").Count(&count)
+	if count != 1 {
+		t.Fatalf("want one alert, got %d", count)
+	}
+}