Book Image

Mastering TypeScript - Fourth Edition

By : Nathan Rozentals
Book Image

Mastering TypeScript - Fourth Edition

By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript, designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Mastering Typescript is a golden standard for budding and experienced developers. With a structured approach that will get you up and running with Typescript quickly, this book will introduce core concepts, then build on them to help you understand (and apply) the more advanced language features. You’ll learn by doing while acquiring the best programming practices along the way. This fourth edition also covers a variety of modern JavaScript and TypeScript frameworks, comparing their strengths and weaknesses. You'll explore Angular, React, Vue, RxJs, Express, NodeJS, and others. You'll get up to speed with unit and integration testing, data transformation, serverless technologies, and asynchronous programming. Next, you’ll learn how to integrate with existing JavaScript libraries, control your compiler options, and use decorators and generics. By the end of the book, you will have built a comprehensive set of web applications, having integrated them into a single cohesive website using micro front-end techniques. This book is about learning the language, understanding when to apply its features, and selecting the framework that fits your real-world project perfectly.
Table of Contents (19 chapters)
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Protractor is a Node-based test runner that is used to tackle end-to-end or automated acceptance testing. Essentially, it is a tool that allows us to programmatically control a web browser. Just like in manual testing, Protractor has the ability to browse to a specific page by entering its URL, and then interact with the elements on the page itself. As an example of how it can be used, suppose that we have a website that has a login page, and all further interaction with the site requires a valid login. We can use Protractor to browse to the login page at the start of each test, enter valid credentials, hit the Login button, and then interact with the site's pages.

Protractor is installed as an npm package as follows:

npm install -g protractor

Here, we have installed the protractor package as a globally accessible node package.

We will get into running Protractor a little later, but first, let's discuss the engine that Protractor uses under the...