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Phonetic key generator to es6 and add some tests
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2 changed files with 49 additions and 28 deletions
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// Draws inspiration from pwgen and http://tools.arantius.com/password
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var PhoneticKeyGenerator = function() {
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// No options
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const randOf = (collection) => {
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return () => {
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return collection[Math.floor(Math.random() * collection.length)];
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};
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};
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// Generate a phonetic key
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PhoneticKeyGenerator.prototype.createKey = function(keyLength) {
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var text = '';
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var start = Math.round(Math.random());
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for (var i = 0; i < keyLength; i++) {
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text += (i % 2 == start) ? this.randConsonant() : this.randVowel();
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// Helper methods to get an random vowel or consonant
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const randVowel = randOf('aeiou');
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const randConsonant = randOf('bcdfghjklmnpqrstvwxyz');
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module.exports = class PhoneticKeyGenerator {
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// Generate a phonetic key of alternating consonant & vowel
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createKey(keyLength) {
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let text = '';
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const start = Math.round(Math.random());
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for (let i = 0; i < keyLength; i++) {
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text += (i % 2 == start) ? randConsonant() : randVowel();
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}
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return text;
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}
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};
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PhoneticKeyGenerator.consonants = 'bcdfghjklmnpqrstvwxyz';
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PhoneticKeyGenerator.vowels = 'aeiou';
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// Get an random vowel
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PhoneticKeyGenerator.prototype.randVowel = function() {
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return PhoneticKeyGenerator.vowels[
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Math.floor(Math.random() * PhoneticKeyGenerator.vowels.length)
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];
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};
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// Get an random consonant
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PhoneticKeyGenerator.prototype.randConsonant = function() {
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return PhoneticKeyGenerator.consonants[
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Math.floor(Math.random() * PhoneticKeyGenerator.consonants.length)
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];
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};
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module.exports = PhoneticKeyGenerator;
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27
test/key_generators/phonetic_spec.js
Normal file
27
test/key_generators/phonetic_spec.js
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/* global describe, it */
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const assert = require('assert');
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const Generator = require('../../lib/key_generators/phonetic');
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const vowels = 'aeiou';
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const consonants = 'bcdfghjklmnpqrstvwxyz';
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describe('RandomKeyGenerator', () => {
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describe('randomKey', () => {
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it('should return a key of the proper length', () => {
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const gen = new Generator();
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assert.equal(6, gen.createKey(6).length);
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});
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it('should alternate consonants and vowels', () => {
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const gen = new Generator();
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const key = gen.createKey(3);
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assert.ok(consonants.includes(key[0]));
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assert.ok(consonants.includes(key[2]));
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assert.ok(vowels.includes(key[1]));
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});
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});
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});
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