pluralize.spec.js
import chai from 'chai';
import pluralize from './pluralize.js';
var assert = chai.assert;
describe('pluralize', () => {
it('should replace the y with ies', () => {
const value = pluralize('company');
assert.strictEqual(value, 'companies');
});
it('should add an s, if the last letter isn\'t a y', () => {
const value = pluralize('mango');
assert.strictEqual(value, 'mangos');
});
});