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// --- Directions // Write a function that returns the number of vowels // used in a string. Vowels are the characters 'a', 'e' // 'i', 'o', and 'u'. // --- Examples // vowels('Hi There!') --> 3 // vowels('Why do you ask?') --> 4 // vowels('Why?') --> 0

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function vowels(str) {const matchs = str.match(/[aeiou]/gi);return matchs ? matchs.length : 0; }module.exports = vowels;

　　

const vowels = require('./index');test('Vowels is a function', () => {expect(typeof vowels).toEqual('function'); });test('returns the number of vowels used', () => {expect(vowels('aeiou')).toEqual(5); });test('returns the number of vowels used when they are capitalized', () => {expect(vowels('AEIOU')).toEqual(5); });test('returns the number of vowels used', () => {expect(vowels('abcdefghijklmnopqrstuvwxyz')).toEqual(5); });test('returns the number of vowels used', () => {expect(vowels('bcdfghjkl')).toEqual(0); });

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轉載于:https://www.cnblogs.com/Answer1215/p/11067274.html

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