Ghost/test/unit/helpers/date_spec.js

const should = require('should');

// Stuff we are testing
const helpers = require('../../../core/frontend/helpers');

const moment = require('moment-timezone');

describe('{{date}} helper', function () {
    it('creates properly formatted date strings', function () {
        const testDates = [
            '2013-12-31T11:28:58.593+02:00',
            '2014-01-01T01:28:58.593+11:00',
            '2014-02-20T01:28:58.593-04:00',
            '2014-03-01T01:28:58.593+00:00'
        ];

        const timezones = 'Europe/Dublin';
        const format = 'MMM Do, YYYY';

        const context = {
            hash: {
                format: format
            },
            data: {
                site: {
                    timezone: 'Europe/Dublin'
                }
            }
        };

        testDates.forEach(function (d) {
            const rendered = helpers.date.call({published_at: d}, context);

            should.exist(rendered);
            String(rendered).should.equal(moment(d).tz(timezones).format(format));
        });
    });

    it('creates properly formatted time ago date strings', function () {
        const testDates = [
            '2013-12-31T23:58:58.593+02:00',
            '2014-01-01T00:28:58.593+11:00',
            '2014-11-20T01:28:58.593-04:00',
            '2014-03-01T01:28:58.593+00:00'
        ];

        const timezones = 'Europe/Dublin';
        const timeNow = moment().tz('Europe/Dublin');

        const context = {
            hash: {
                timeago: true
            },
            data: {
                site: {
                    timezone: 'Europe/Dublin'
                }
            }
        };

        testDates.forEach(function (d) {
            const rendered = helpers.date.call({published_at: d}, context);

            should.exist(rendered);
            String(rendered).should.equal(moment(d).tz(timezones).from(timeNow));
        });
    });
});