test: add convertHexToUtf8 unittest

utils/__tests__/helper.test.ts

@@ -1,5 +1,5 @@
 import { expect, test } from '@jest/globals'
-import { convertBalanceToView, getAmountFromBignumber } from 'utils/helper'
+import { convertBalanceToView, convertHexToUtf8, getAmountFromBignumber } from 'utils/helper'
 
 describe('helper.getAmountFromBignumber() fnc', () => {
 	test('with normal bignumber', () => {
@@ -42,3 +42,21 @@ describe('helper.convertBalanceToView() fnc', () => {
 		expect(convertBalanceToView('1', '0')).toBe('1')
 	})
 })
+
+describe('helper.convertHexToUtf8() fnc', () => {
+	test('with hex string', () => {
+		expect(
+			convertHexToUtf8(
+				'0x4769e1baa369207468c6b0e1bb9f6e67204d696e6967616d65205468c3aa6d2062e1baa16e207468c3aa6d20415341'
+			).replace(/\0/g, '') // remove null character from received string
+		).toBe('Giải thưởng Minigame Thêm bạn thêm ASA')
+	})
+
+	test('with empty string', () => {
+		expect(convertHexToUtf8('')).toBe('')
+	})
+
+	test('with null', () => {
+		expect(convertHexToUtf8(null)).toBe('')
+	})
+})

utils/helper.ts

@@ -257,6 +257,7 @@ export function convertBigNumberToString(x: any) {
 export const isMainnet = process.env.NEXT_PUBLIC_ENV === 'mainnet'
 
 export const convertHexToUtf8 = (hex: string) => {
+	if (hex === null || hex === undefined || hex === '') return ''
 	var s = ''
 	for (var i = 0; i < hex.length; i += 2) {
 		s += String.fromCharCode(parseInt(hex.substr(i, 2), 16))