/* eslint no-undef: "off" */

const SRC = '../src';
const Helper = require(`${SRC}/Helper`);
const moment = require('moment');

describe("Helper test suite: ", function() {

    it("urlEncode(): happy", function() {
        expect(Helper.urlEncode('中')).toBe('%E4%B8%AD');
    });

    it("urlDecode(): happy", function() {
        expect(Helper.urlDecode('%E4%B8%AD')).toBe('中');
    });

    it("formatDate(): happy", function() {
        const m = moment();
        m.year(2017).month(8).daysInMonth(17);
        m.hour(23).minute(32).second(43);
        expect(Helper.formatDate(m)).toBe('2017-09-17 23:32:43');
    });
});
@@ -455,97 +455,52 @@
 ent(
-);%0A        m.year(2017).month(8).daysInMonth(17);%0A        m.hour(23).minute(32).second(43
+'2017-09-17 23:32:43', 'YYYY-MM-DD HH:mm:ss'
 );%0A 

Improve HelperTest.js