fix: stabilize backend tests

backend/app/services/notification_test.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"database/sql"
 	"testing"
+	"time"
 
 	"quyun/v2/app/commands/testx"
 	app_dto "quyun/v2/app/http/v1/dto"
+	"quyun/v2/app/requests"
 	"quyun/v2/database"
 	"quyun/v2/database/models"
 	"quyun/v2/pkg/consts"
@@ -49,8 +51,15 @@ func (s *NotificationTestSuite) Test_CRUD() {
 			err := Notification.Send(ctx, uID, "system", "Welcome", "Hello World")
 			So(err, ShouldBeNil)
 
-			list, err := Notification.List(ctx, uID, 1, "")
-			So(err, ShouldBeNil)
+			var list *requests.Pager
+			for i := 0; i < 5; i++ {
+				list, err = Notification.List(ctx, uID, 1, "")
+				So(err, ShouldBeNil)
+				if list.Total > 0 {
+					break
+				}
+				time.Sleep(50 * time.Millisecond)
+			}
 			So(list.Total, ShouldEqual, 1)
 
 			items := list.Items.([]app_dto.Notification)