Add basic test suite using jest. Initiate with 'npm test'

index.js

@@ -34,4 +34,4 @@ app.get('/', (req, res) => res.render('index',
     title: 'Index'
   }));
 
-app.listen(3000, () => console.log('Example app listening on http://localhost:3000'))
+app.listen(3000, () => console.log('Example app listening on http://localhost:3000'));

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "start": "node index.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "node ./node_modules/jest/bin/jest.js"
   },
   "author": "",
   "license": "ISC",
@@ -15,6 +15,7 @@
     "pug": "^2.0.3"
   },
   "devDependencies": {
-    "eslint": "^4.19.1"
+    "eslint": "^4.19.1",
+    "jest": "^22.4.3"
   }
 }

payload/.eslintrc

@@ -4,7 +4,8 @@
     "browser": true,
     "commonjs": true,
     "node": true,
-    "es6": true
+    "es6": true,
+    "jest": true
   },
   "parserOptions": {
     "sourceType": "module",

payload/index.js

@@ -4,7 +4,7 @@ const Collection = require('./Collection');
 class Payload {
 
   constructor(options) {
-    this.app = options.express;
+    this.express = options.express;
     this.mongoose = options.mongoose;
     this.baseURL = options.baseURL;
 
@@ -12,7 +12,7 @@ class Payload {
 
     this.collections = {};
 
-    this.app.get(`/payload/admin`, function (req, res) {
+    this.express.get(`/payload/admin`, function (req, res) {
       res.render('admin',
         {
           title: 'Payload Admin'

payload/tests/payload.test.js

@@ -0,0 +1,45 @@
+const express = require('express');
+const app = express();
+const mongoose = require('mongoose');
+
+const Payload = require('../');
+
+describe('Basic Payload Tests', () => {
+  test('Instantiate Payload', () => {
+    const payload = initBasicPayload();
+    expect(payload).toBeDefined();
+  });
+
+  test('Create new collection', () => {
+    const payload = initBasicPayload();
+    let collection = payload.newCollection('key');
+    expect(collection).toBeDefined();
+  });
+
+  test('Retrieve collection', () => {
+    const payload = initBasicPayload();
+    let collection = payload.newCollection('key');
+    collection.register();
+    let retrieved = payload.getCollection('key');
+    expect(retrieved).toBeDefined();
+  });
+});
+
+describe('Collection tests', () => {
+  test('Add fields to collection', () => {
+    const payload = initBasicPayload();
+    let collection = payload.newCollection('key');
+    collection.add({
+      test: { testProp: 'firstProp'}
+    });
+    expect(collection.fields.test.testProp).toBe('firstProp');
+  });
+});
+
+function initBasicPayload() {
+  return new Payload({
+    express: app,
+    mongoose,
+    baseURL: 'base123'
+  });
+}