Book Image

Mastering TypeScript 3 - Third Edition

By : Nathan Rozentals
Book Image

Mastering TypeScript 3 - Third Edition

By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript. It was designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Starting with an introduction to the TypeScript language, before moving on to basic concepts, each section builds on previous knowledge in an incremental and easy-to-understand way. Advanced and powerful language features are all covered, including asynchronous programming techniques, decorators, and generics. This book explores many modern JavaScript and TypeScript frameworks side by side in order for the reader to learn their respective strengths and weaknesses. It will also thoroughly explore unit and integration testing for each framework. Best-of-breed applications utilize well-known design patterns in order to be scalable, maintainable, and testable. This book explores some of these object-oriented techniques and patterns, and shows real-world implementations. By the end of the book, you will have built a comprehensive, end-to-end web application to show how TypeScript language features, design patterns, and industry best practices can be brought together in a real-world scenario.
Table of Contents (16 chapters)
Free Chapter
TypeScript Tools and Framework Options

Aurelia testing

In this section, we will explore the unit-testing capabilities of the Aurelia framework. We will write some unit tests for the application that we have written, in order to ensure that the initial state of the application is correct, as well as to ensure that the rendered HTML is correct. These tests will follow the general scenarios that we outlined at the beginning of the chapter.

Aurelia test setup

One of the questions that the Aurelia command-line interface asks when setting up a new Aurelia application (au new) is whether or not to configure unit-testing. If we answer yes to this question, then all of the testing configuration files and dependencies are installed automatically. In the interests of time...