Add test case

Author: qwerty287

routers/web/repo/issue_test.go

@@ -301,6 +301,66 @@ func TestCombineLabelComments(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "kase 6",
+			beforeCombined: []*models.Comment{
+				{
+					Type:     models.CommentTypeLabel,
+					PosterID: 1,
+					Content:  "1",
+					Label: &models.Label{
+						Name: "kind/bug",
+					},
+					CreatedUnix: 0,
+				},
+				{
+					Type:     models.CommentTypeLabel,
+					PosterID: 1,
+					Content:  "1",
+					Label: &models.Label{
+						Name: "reviewed/confirmed",
+					},
+					CreatedUnix: 0,
+				},
+				{
+					Type:     models.CommentTypeLabel,
+					PosterID: 1,
+					Content:  "",
+					Label: &models.Label{
+						Name: "kind/bug",
+					},
+					CreatedUnix: 0,
+				},
+				{
+					Type:     models.CommentTypeLabel,
+					PosterID: 1,
+					Content:  "1",
+					Label: &models.Label{
+						Name: "kind/feature",
+					},
+					CreatedUnix: 0,
+				},
+			},
+			afterCombined: []*models.Comment{
+				{
+					Type:     models.CommentTypeLabel,
+					PosterID: 1,
+					Content:  "1",
+					Label: &models.Label{
+						Name: "kind/bug",
+					},
+					AddedLabels: []*models.Label{
+						{
+							Name: "reviewed/confirmed",
+						},
+						{
+							Name: "kind/feature",
+						},
+					},
+					CreatedUnix: 0,
+				},
+			},
+		},
 	}
 
 	for _, kase := range kases {