Full test coverage

.gitignore

@@ -0,0 +1,14 @@
+# dependencies
+/node_modules
+
+# reports
+/coverage
+/.nyc_output
+
+# distributions
+/dist
+
+# system files
+.DS_Store
+
+/.env

.mocharc.yml

@@ -0,0 +1,4 @@
+full-trace: true
+spec: '**/*.spec.js'
+bail: true
+slow: 2000

index.js → enigma.js

@@ -1,3 +1,6 @@
+/**
+ * Class Declaration
+ */
 class Enigma {
 
  constructor(
@@ -23,15 +26,15 @@ class Enigma {
  const pairs = this.plugboardSettings.split(' ');
  pairs.forEach(
  pair => {
- const first = pair[0].toUpperCase();
- const second = pair[1].toUpperCase();
-
- this.plugboard[first] = second;
- this.plugboard[second] = first;
+ if(pair[0]) {
+ const first = pair[0].toUpperCase();
+ const second = pair[1].toUpperCase();
+
+ this.plugboard[first] = second;
+ this.plugboard[second] = first;
+ }
  }
  );
-
- console.log(this.plugboard)
  }
 
  encrypt(text) {
@@ -120,8 +123,6 @@ class Enigma {
  }
 }
 
-const aEnigma = new Enigma([ 5, 10, 9 ], 'ea bc df hi km zt xp ln');
-const bEnigma = new Enigma([ 5, 10, 9 ], 'ea bc df hi km zt xp ln');
-
-console.log(aEnigma.encrypt('HITHISISANENCRYPTEDSENTENCE'))
-console.log(bEnigma.encrypt('FLYANJAHZGWMQNZQOJYRUGBZJGG'))
+module.exports = {
+ Enigma
+};

enigma.spec.js

@@ -0,0 +1,39 @@
+const { expect } = require('chai');
+const { Enigma } = require('./enigma');
+
+describe('Class: Enigma', () => {
+
+ it('should correctly encrypt a string', () => {
+
+ const encrypted = 'FLYANJAHZGWMQNZQOJYRUGBZJGG';
+ const decrypted = 'hi this is an encrypted sentence';
+
+ const aEnigma = new Enigma([ 5, 10, 9 ], 'ea bc df hi km zt xp ln');
+
+ expect(aEnigma.encrypt(decrypted)).to.equal(encrypted);
+ });
+
+ it('should correctly decrypt a string', () => {
+
+ const encrypted = 'FLYANJAHZGWMQNZQOJYRUGBZJGG';
+ const decrypted = 'HITHISISANENCRYPTEDSENTENCE';
+
+ const aEnigma = new Enigma([ 5, 10, 9 ], 'ea bc df hi km zt xp ln');
+
+ expect(aEnigma.encrypt(encrypted)).to.equal(decrypted);
+ });
+
+ it('should default rotor settings to [0, 0, 0]', () => {
+ const aEnigma = new Enigma();
+
+ expect(aEnigma.rotorSettings).to.deep.equal([0, 0, 0]);
+ });
+
+ it('should roll over max rotors to [0, 0, 1]', () => {
+ const aEnigma = new Enigma([ 25, 25, 25 ], 'ea bc df hi km zt xp ln');
+
+ aEnigma.encrypt('A');
+
+ expect(aEnigma.rotorSettings).to.deep.equal([0, 0, 0]);
+ });
+});