Book Image

TypeScript 2.x By Example

By : Sachin Ohri
Book Image

TypeScript 2.x By Example

By: Sachin Ohri

Overview of this book

The TypeScript language, compiler, and open source development toolset brings JavaScript development up to the enterprise level. It allows you to use ES5, ES6, and ES7 JavaScript language features today, including classes, interfaces, generics, modules, and more. Its simple typing syntax enables building large, robust applications using object-oriented techniques and industry-standard design principles. This book aims at teaching you how to get up and running with TypeScript development in the most practical way possible. Taking you through two exciting projects built from scratch, you will learn the basics of TypeScript, before progressing to functions, generics, promises, and callbacks. Then, you’ll get to implement object-oriented programming as well as optimize your applications with effective memory management. You’ll also learn to test and secure your applications, before deploying them. Starting with a basic SPA built using Angular, you will progress on to building, maybe, a Chat application or a cool application. You’ll also learn how to use NativeScript to build a cool mobile application. Each of these applications with be explained in detail, allowing you to grasp the concepts fast. By the end of this book, you will have not only built two amazing projects but you will also have the skills necessary to take your development to the next level.
Table of Contents (11 chapters)

Testing the Trello Application

Does your application work as intended? Are there any scenarios where your application behaves unexpectedly? To confidently answer these questions, we need to test our application. Now, we can manually test all our features and functionalities and try to unearth any bugs in our application, or we can write test cases in our application. Which approach is better?

In this chapter, we will focus on testing, and how writing test cases provides us with a better application than solely relying on manual testing. In this chapter, we will be covering the following topics:

  • We will start by looking at what it means to be writing test cases in comparison to manual testing
  • Then we will also talk about test-driven development, and how to go about implementing that in software development
  • After these, we will start implementing our test cases in the Sample Trello...