Merge pull request #1 from so0oshiance/multiply

Multiply

Author: Mohamad Farhani

.travis.yml

@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - 7

index.js

@@ -1,19 +1,23 @@
 'use strict';
 
 function add(a, b) {
-    return a + b;
+  return a + b;
 }
 
 function subtract(a, b) {
-    return a - b;
+  return a - b;
 }
 
 function divide(a, b) {
-    return a / b;
+  return a / b;
+}
+function multiply(a, b) {
+  return a * b;
 }
 
 module.exports = {
-    add,
-    subtract,
-    divide
-};
+  add,
+  subtract,
+  divide,
+  multiply
+};

package-lock.json

@@ -1,11 +1,18 @@
 'use strict';
 
-const {assert} = require('chai');
+const { assert } = require('chai');
+const { multiply } = require('../');
 
 describe('multiply()', () => {
-    it('should multiply positive numbers together');
+  it('should multiply positive numbers together', () => {
+    assert.equal(multiply(2, 3), 6);
+  });
 
-    it('should multiply positive and negative numbers together');
+  it('should multiply positive and negative numbers together', () => {
+    assert.equal(multiply(2, -3), -6);
+  });
 
-    it('should multiply negative numbers together');
-});
+  it('should multiply negative numbers together', () => {
+    assert.equal(multiply(-2, -3), 6);
+  });
+});