Bøger af Daniel Irvine

Build robust and performant applications by developing SvelteKit applications using automated testing and TDD techniques, including unit and end-to-end testing, custom matchers, component mocking, and authenticationPurchase of the print or Kindle book includes a free PDF eBookKey Features:Understand and master the test-driven development (TDD) workflowExplore the principles of unit testing with Vitest and end-to-end testing using Playwright and Cucumber.jsLeverage practical examples of unit tests covering a range of SvelteKit framework featuresBook 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.What You Will Learn:Create clear and concise Vitest unit tests helping the implementation of Svelte componentsUse Playwright and Cucumber.js to develop end-to-end tests that simulate user interactions and test the functionality of your applicationLeverage component mocks to isolate and test individual componentsWrite unit tests for a range of Svelte framework featuresExplore effective refactoring techniques to keep your Svelte application code and test suites cleanBuild high-quality Svelte applications that are well-tested, performant, and resilient to changesWho this book is 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.

Learn to write better automated tests that will dramatically increase your productivity and have fun while doing so. This book is a build-your-own adventure designed for individual reading and for collaborative workshops. You will build an xUnit automated test framework using JavaScript: initially a clone of Jest, but adding a couple of neat features borrowed from RSpec, the genre-defining tool for behavior-driven development (BDD). Along the way, you will explore the philosophy behind automated testing best practices. The automated test runner is one of the most important innovations within software engineering. But for many programmers, automated testing remains a mystery, and knowing how to write good tests is akin to sorcery.As the chapters of this book unfold, you will see how the humble test runner is an elegant and simple piece of software. Each chapter picks a single feature to build, like the "it" function or the "beforeEach" block. It picks apart the theory of why the feature needs to exist, and how to use it effectively in your own test suites. Every chapter ends with a set of ideas for extension points should you wish to explore further, alone or in groups. The book culminates in an implementation of test doubles and mocks¿one of the most difficult and misunderstood concepts within automated testing.By the end of the book, you will have gained a solid understanding of automated testing principles that you can immediately apply to your work projects. What You'll LearnBuild an xUnit automated test frameworkSee how an automated test runner worksUnderstand the best practices for automated unit testingEffectively use test doubles and mocksWho This Book Is ForSoftware developers with JavaScript experience who are seeking to master the art of automated testing.

This book is comprehensive walk through of Test-Driven Development (TDD) for React. It takes a first-principles approach to teach the TDD process using vanilla Jest. Readers build their own test library as they refactor out repeated code in tandem with building a real-world application. It also covers acceptance testing using Cucumber and ...