fix:#25 added tests and schedule updates

backend/service/functions/string.go

@@ -48,13 +48,6 @@ func Contains(s []string, e string) bool {
 	return false
 }
 
-func ReplaceEmptyString(word string, replacement string) string {
-	if OnlyWhitespace(word) {
-		return replacement
-	}
-	return word
-}
-
 func HashString(s string) string {
 	hash := sha256.New()
 	hash.Write([]byte(s))