Add unit test for searching

server/dao/db.go

@@ -70,3 +70,11 @@ func GetDB() *gorm.DB {
 func IsReady() bool {
 	return ready
 }
+
+func Close() error {
+	sqlDB, err := db.DB()
+	if err != nil {
+		return err
+	}
+	return sqlDB.Close()
+}

server/dao/tag_test.go

@@ -104,8 +104,6 @@ func TestTag(t *testing.T) {
 	assert.Nil(t, tag6.AliasOf)
 
 	// cleanup
-	d, err := db.DB()
-	assert.Nil(t, err)
-	_ = d.Close()
+	_ = Close()
 	_ = os.Remove("test.db")
 }