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Learn to build and deploy a full-stack MERN application. Gain insights into MongoDB basics, Node.js backend, and React frontend. Explore API testing and Heroku deployment.

Beginning Node.js, Express & MongoDB Development.png

MERN.tar.gz

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In this course, you’ll learn how to build a full-stack application using the MERN stack and deploy it to the internet. The MERN stack is a popular stack of technologies that build modern Single Page Applications (SPAs).

You’ll begin with the basics of MongoDB and the process of setting it up. Next, you will go over work with the Atlas cloud database. Then, you’ll learn how to set up the backend using Node and express. Also, you’ll be creating a fully functional movie review application. After creating the controller and data access objects, you’ll learn to create routes. Next, you’ll test the created API. Finally, you’ll learn how to create the frontend using the React components and deploy the application on Heroku.

By the end of this course, you’ll learn how to connect both the backend and the frontend to create a full-stack MERN application, as well as how to deploy it.

Beginning Node.js, Express & MongoDB Development

In this lesson, we'll test the reviews API of our back-end server.

import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


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To test the reviews API, we first need to get an existing MovieId. We can send a GET request to the route `/api/v1/movies` to retrieve all movies and then pick any MovieId.

# Testing the add review endpoint

Next, let's make a POST request to the route `/api/v1/movies/review` and provide the review body, something like in the JSON object below:

Let's learn how to test the API of a Node.js back-end server.

Testing the Reviews API

Introduction and Setting up the Database

Setting up the Backend

Setting up the Frontend : Creating the Server

Setting up the Frontend: Creating the React Components

Deployment

Conclusion

Testing the Reviews API

Testing the add review endpoint