Fix package structure

Author: wanseob

Diff for: index.js

@@ -5,6 +5,4 @@
  *
  */
 
-const Commitground = require('./src/Commitground');
-
-module.exports = Commitground;
+module.exports = require('./src/Commitground');

Diff for: package-lock.json

@@ -20,6 +20,7 @@
   },
   "homepage": "https://github.com/commitground/commitground-js#readme",
   "devDependencies": {
+    "chai": "^4.1.2",
     "eslint": "^4.19.1",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-plugin-import": "^2.12.0",

Diff for: package.json

@@ -0,0 +1,5 @@
+const Commitground = {
+  hello: () => 'world',
+};
+
+module.exports = Commitground;

Diff for: src/Commitground.js

@@ -1,8 +1,8 @@
-var assert = require('assert');
-var commitground = require('commitground');
+var assert = require('chai').assert;
+var commitground = require('../index.js');
 
-describe('Suite of test', function() {
-  it('should be passed', function() {
-    assert.ok(true)
+describe('hello()', function() {
+  it('should return "world"', function() {
+    assert(commitground.hello() === 'world', 'Passed Hello world test')
   })
 })