Ghost/test/unit/helpers/price_spec.js

const should = require('should');
const helpers = require('../../../core/frontend/helpers');
const handlebars = require('../../../core/frontend/services/theme-engine/engine').handlebars;

function compile(templateString) {
    const template = handlebars.compile(templateString);
    template.with = (locals = {}, globals) => {
        return template(locals, globals);
    };

    return template;
}

describe('{{price}} helper', function () {
    before(function () {
        handlebars.registerHelper('price', helpers.price);
    });

    it('throws an error for no provided parameters', function () {
        (function compileWith() {
            compile('{{price}}')
                .with({});
        }).should.throw();
    });

    it('throws an error for undefined parameter', function () {
        (function compileWith() {
            compile('{{price @dont.exist}}')
                .with({});
        }).should.throw();
    });

    it('throws if argument is not a number', function () {
        (function compileWith() {
            compile('{{price "not_a_number"}}')
                .with({});
        }).should.throw();
    });

    it('will format decimal adjusted amount', function () {
        compile('{{price 2000}}')
            .with({})
            .should.equal('20');
    });

    it('will format with plan object', function () {
        const plan = {
            nickname: 'Monthly',
            amount: 500,
            interval: 'month',
            currency: 'USD',
            currency_symbol: '$'
        };
        const rendered = helpers.price.call({}, plan, {});
        rendered.should.be.equal('$5');
    });

    it('will format with plan object with number format', function () {
        const plan = {
            nickname: 'Monthly',
            amount: 500,
            interval: 'month',
            currency: 'USD',
            currency_symbol: '$'
        };
        const rendered = helpers.price.call({}, plan, {hash: {numberFormat: 'long'}});
        rendered.should.be.equal('$5.00');
    });

    it('will format symbol if only currency - USD', function () {
        const rendered = helpers.price.call({}, {hash: {currency: 'USD'}});
        rendered.should.be.equal('$');
    });

    it('will format symbol if only currency - EUR', function () {
        const rendered = helpers.price.call({}, {hash: {currency: 'EUR'}});
        rendered.should.be.equal('€');
    });

    it('will format with amount and currency', function () {
        const rendered = helpers.price.call({}, 500, {hash: {currency: 'USD'}});
        rendered.should.be.equal('$5');
    });

    it('will format with long number format', function () {
        const rendered = helpers.price.call({}, 500, {hash: {currency: 'USD', numberFormat: 'long'}});
        rendered.should.be.equal('$5.00');
    });

    it('will format with short number format with decimal value', function () {
        const rendered = helpers.price.call({}, 505, {hash: {currency: 'EUR', numberFormat: 'short'}});
        rendered.should.be.equal('€5.05');
    });

    it('will format with short number format without decimal value', function () {
        const rendered = helpers.price.call({}, 500, {hash: {currency: 'EUR', numberFormat: 'short'}});
        rendered.should.be.equal('€5');
    });

    it('will format with name currency format', function () {
        const rendered = helpers.price.call({}, 500, {hash: {currency: 'USD', currencyFormat: 'name'}});
        rendered.should.be.equal('5 US dollars');
    });
});