main.js

'use strict';

// brings in the assert module for unit testing
const assert = require('assert');
// brings in the readline module to access the command line
const readline = require('readline');
// use the readline module to print out to the command line
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

  const userWord = "Hello";
  const pigla = "ay";
  console.log(userWord.slice(0,1));
  console.log(userWord.slice(1));
  
     const pigLatin = () => {
      if (userWord.length > 0){
      const vowels = ["a","e","i","o","u"];
      const firstLetter = userWord.slice(0,1);
      const sLast = userWord.slice(1);
  
        if (firstLetter === "a" || firstLetter === "e" || firstLetter === "i" || firstLetter === "o" || firstLetter === "u") {
          output = userWord + pigla;
        }
  
        else {
          output = sLast + firstLetter + pigla;
        }
        return output
    }		
    
      };
      const answer = pigLatin();
      console.log(answer)

}

// the first function called in the program to get an input from the user
// to run the function use the command: node main.js
// to close it ctrl + C
const getPrompt = () => {
  rl.question('word ', (answer) => {
    console.log( pigLatin(answer) );
    getPrompt();
  });
}

// Unit Tests
// You use them run the command: npm test main.js
// to close them ctrl + C
if (typeof describe === 'function') {

  describe('#pigLatin()', () => {
    it('should translate a simple word', () => {
      assert.equal(pigLatin('car'), 'arcay');
      assert.equal(pigLatin('dog'), 'ogday');
    });
    it('should translate a complex word', () => {
      assert.equal(pigLatin('create'), 'eatecray');
      assert.equal(pigLatin('valley'), 'alleyvay');
    });
    it('should attach "yay" if word begins with vowel', () => {
      assert.equal(pigLatin('egg'), 'eggyay');
      assert.equal(pigLatin('emission'), 'emissionyay');
    });
    it('should lowercase and trim word before translation', () => {
      assert.equal(pigLatin('HeLlO '), 'ellohay');
      assert.equal(pigLatin(' RoCkEt'), 'ocketray');
    });
  });
} else {

  getPrompt();

}






// **********
//   HINTS
// **********

// break your code into pieces and focus on one piece at a time...
// 1. if word begins with a vowel send to one function: adds "yay"
// 2. if word begins in with a consonant send to another function: splices off beginning, returns word with new ending.
// 3. if multiple words, create array of words, loop over them, sending them to different functions and creating a new array with the new words.