done with lab

yana-lab/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const sayHey = require('./lib/greetings.js');
+
+function verifyName() {
+  var regex = new RegExp(/[^a-zA-z]/, 'g');
+  for (let i = 2; i <= process.argv.length; i++) {
+    if (!regex.test(process.argv[i])) return console.log(sayHey.greet(process.argv[i]));
+  }
+  return (console.log(sayHey.greet()));
+}
+
+verifyName();

yana-lab/lib/greetings.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = exports = {};
+
+exports.greet = function(name) {
+  if (arguments[0] === undefined) throw new Error('no name was passed into fx')
+  return `hey ${name}!`;
+}

yana-lab/test/greet-test.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const sayHey = require('../lib/greetings.js');
+const assert = require('assert');
+
+describe('Greet Module', function() {
+  describe('#greet', function() {
+    it('should return hey Bob!', function() {
+      var result = sayHey.greet('Bob');
+      assert.ok(result === 'hey Bob!', 'does not equal hey Bob!');
+    });
+    it('should throw an error if no name provided', function() {
+      assert.throws(function() {
+        sayHey.greet();
+      }, 'error not thrown');
+    });
+  });
+});