Book Image

MongoDB, Express, Angular, and Node.js Fundamentals

By : Paul Oluyege
Book Image

MongoDB, Express, Angular, and Node.js Fundamentals

By: Paul Oluyege

Overview of this book

MongoDB, Express, Angular and Node.js Fundamentals is a practical guide to the tried-and-true production-ready MEAN stack, with tips and best practices. The book begins by demystifying the MEAN architecture. You’ll take a look at the features of the JavaScript libraries, technologies, and frameworks that make up a MEAN stack. With this book, you'll not only learn how to develop highly scalable, asynchronous, and event-driven APIs quickly with Express and Node.js, but you'll also be able put your full-stack skills to use by building two full-fledged MEAN applications from scratch. You’ll understand how to build a blogging application using the MEAN stack and get to grips with user authentication using MEAN. As you progress through the chapters, you’ll explore some old and new features of Angular, such as pipes, reactive forms, modules and optimizing apps, animations and unit testing, and much more. By the end of the book, you’ll get ready to take control of the MEAN stack and transform into a full-stack JavaScript developer, developing efficient web applications using Javascript technologies.
Table of Contents (9 chapters)
MongoDB, Express, Angular, and Node.js Fundamentals
Preface

Testing Angular Applications


In this section, we will be learning about Angular application testing. Tests are the best way to prevent software defects. As more features are being added and application complexity increases, updating code and checking the browser manually will no longer be easy, sustainable, error free, and will become expensive. Therefore, recent versions of Angular provide a module called HttpClientTestingModule to make testing very easy to perform.

There are two type of tests in Angular: unit testing and e2e testing (also known as functional testing). Unit testing can also be referred to as isolated testing, because it involves testing a small, isolated piece of code. The other type, e2e testing, involves testing the complete functionality of an application in a way that is close to real-life application use (just like a user would interact with it in real life).

Getting Started with Unit Testing

Unit testing an Angular application could involve writing a small isolated...