01 Caleb - Node CLI Greeting app

.eslintrc

@@ -0,0 +1,21 @@
+{
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": [ "error", "single" ],
+    "semi": ["error", "always"],
+    "linebreak-style": [ "error", "unix" ]
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true,
+    "jasmine": true
+  },
+  "ecmaFeatures": {
+    "modules": true,
+    "experimentalObjectRestSpread": true,
+    "impliedStrict": true
+  },
+  "extends": "eslint:recommended"
+}

greet.js

@@ -0,0 +1,9 @@
+'use strict';
+
+const greeting = require('./lib/greeting.js');
+
+// set name as user inputed command line argument following 'node' and filename
+var name = process.argv[process.argv.length - 1];
+
+greeting.welcome(name);
+greeting.farewell(name);

lib/greeting.js

@@ -0,0 +1,17 @@
+'use strict';
+
+module.exports = exports = {};
+
+exports.welcome = function(name) {
+  if (/[^a-z]/i.test(name)) throw new Error('non-alphabetical characters not allowed, or no name provided');
+  if (arguments.length === 0) throw new Error('no name provided');
+  var welcomeMessage = `Hello and welcome, ${name}! Glad you can be here!`;
+  console.log(welcomeMessage);
+  return welcomeMessage;
+};
+
+exports.farewell = function(name) {
+  var farewellMessage = `Glad you could stay for a while, ${name}! Bye and see you next time!`;
+  console.log(farewellMessage);
+  return farewellMessage;
+};

test/greeting-test.js

@@ -0,0 +1,19 @@
+'use strict';
+
+const greeting = require('../lib/greeting.js');
+
+const assert = require('assert');
+
+describe('Greeting', function() {
+  describe('#welcome', function() {
+    it('should print a greeting message customized with the user\'s inputted name.', function() {
+      var result = greeting.welcome('Caleb');
+      assert.ok(result === 'Hello and welcome, Caleb! Glad you can be here!', 'greeting not printed as expected');
+    });
+    it('should throw an error indicating a missing name or unexpected charater', function() {
+      assert.throws(function() {
+        greeting.welcome();
+      }, 'error not thrown');
+    });
+  });
+});