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Key benefits

Understand and master the test-driven development (TDD) workflow

Explore the principles of unit testing with Vitest and end-to-end testing using Playwright and Cucumber.js

Leverage practical examples of unit tests covering a range of SvelteKit framework features

Description

Svelte is a popular front-end framework used for its focus on performance and user-friendliness, and test-driven development (TDD) is a powerful approach that helps in creating automated tests before writing code. By combining them, you can create efficient, maintainable code for modern applications. Svelte with Test-Driven Development will help you learn effective automated testing practices to build and maintain Svelte applications. In the first part of the book, you’ll find a guided walkthrough on building a SvelteKit application using the TDD workflow. You’ll uncover the main concepts for writing effective unit test cases and practical advice for developing solid, maintainable test suites that can speed up application development while remaining effective as the application evolves. In the next part of the book, you’ll focus on refactoring and advanced test techniques, such as using component mocks and writing BDD-style tests with the Cucumber.js framework. In the final part of the book, you’ll explore how to test complex application and framework features, including authentication, Svelte stores, and service workers. By the end of this book, you’ll be well-equipped to build test-driven Svelte applications by employing theoretical and practical knowledge.

Who is this book for?

This book is an essential guide for Svelte developers seeking to enhance their development process by learning the TDD workflow and its application. Whether you are an experienced developer or new to automated testing, this book helps you gain a practical approach to improving your workflow. The examples are written in JavaScript, making them accessible to all developers, including TypeScript developers.

What you will learn

Create clear and concise Vitest unit tests helping the implementation of Svelte components

Use Playwright and Cucumber.js to develop end-to-end tests that simulate user interactions and test the functionality of your application

Leverage component mocks to isolate and test individual components

Write unit tests for a range of Svelte framework features

Explore effective refactoring techniques to keep your Svelte application code and test suites clean

Build high-quality Svelte applications that are well-tested, performant, and resilient to changes

What do you get with Print?

Instant access to your digital copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Redeem a companion digital copy on all Print orders

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

AI Assistant (beta) to help accelerate your learning

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Amazon verified reviews

Theodore Spielman Jun 30, 2023

I'm a few chapters into this book and wanted to put up my initial impression. I find a lot of programming books very dense and a struggle to get through, but this isn't one of them. It's surprisingly easy to read and follow along. Daniel Irvine was able to balance being informative and comprehensive enough for those new to svelte and tdd while not being verbose and tiresome. Personally, I've never been a fan of tdd, but I'm actually looking forward to diving deeper into the workflow outlined in the book and making use of it in my own projects. I'll have to follow up once I finish the book but so far packt seems to have put out another winner.

Amazon Verified review

Cameron Tully-Smith Jul 05, 2023

Love the simplicity of the examples and the focus on TDD/overview of it. Nice approach to formalizing Svelte usage.

Sukhmeet S Khalar Jul 03, 2023

I'm a quarter of the way through the book, and it does a very good job of explaining Test Driven Development (TDD). It goes over the core concepts and features of TDD.Using SvelteKit is just a plus in my eyes. You don't need to know Svelte to go through this book. The author does a good job of balancing technical and practical points.

Tim Hildegard Jul 31, 2023

I liked the book very much. There aren't that many resources on the topic of TDD for Svelte, and the book does a nice job of showing how to use Vitest and Playwright.The book mostly uses numbered lists to show how to build up the tests and code in Red-Pass-Refactor cycles. It starts off with simple tests, and then gradually increases the complexity.The tests are all based on reasonably realistic examples, which makes the easy to port to one's own projects. On the flipside, the book can become a little repetitive, since the testing is very thorough and all code is shown. But I preferred that over having incomplete examples.

Dylan Hildenbrand Aug 11, 2023

Having tests to ensure code is behaving as expected is a great practice that can sometimes be tricky to implement. This book clearly demonstrates not only how to get started but how to ensure consistent practices are followed, leading to more reliable code. There are lots of different resources out there that explain testing but in my opinion, this book should be considered the definitive guide to testing SvelteKit applications.The book starts by introducing some basic testing concepts and helping the reader setup the environment to code alongside. It's highly recommended to run the code along with the book, but if you'd prefer simply to peruse it, there is a very well organized GitHub repository provided with all code samples. After introducing some basic tests, the complexity is gradually increased while the book demonstrates various testing and code refactoring techniques and practical examples. By the end of the book, I felt comfortable with testing some more advanced functionality like authentication and service workers. I can't wait to begin implementing everything taught here. I fully expect to be referring to this book very frequently throughout the refactoring process of my own applications.

Svelte with Test-Driven Development: Advance your skills and write effective automated tests with Vitest, Playwright, and Cucumber.js

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