Jest Techniques And Best Practices
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Jest Techniques and Best Practices
"Jest Techniques and Best Practices" "Jest Techniques and Best Practices" serves as an authoritative, comprehensive guide for software engineers, testers, and architects aiming to master the depths of modern JavaScript testing with Jest. From its internal architecture—covering event loops, concurrency, and worker management—to nuanced configuration and plugin ecosystems, this book delves into how and why Jest works at scale. Detailed chapters illuminate everything from module resolution and globals to the plugin and reporter infrastructures that make extended workflows possible, providing advanced readers with the technical context needed to fully unlock Jest’s power. The book further explores sophisticated test design patterns and structuring strategies, emphasizing scalability, maintainability, and clarity. It addresses mock management, dependency control, and robust snapshot testing, including the creation of custom serializers, security practices, and effective review workflows. Comprehensive guidance is given to integration and end-to-end testing: orchestrating complex environments, leveraging browser automation frameworks, managing flaky tests, and controlling data across runs. Practical case studies and actionable strategies make these advanced topics accessible and directly relevant to real-world projects. Rounding out its scope, "Jest Techniques and Best Practices" offers expert coverage of scaling across monorepos, optimizing CI/CD integration, and advanced coverage and analytics for code quality assurance. Chapters on maintenance, performance optimization, and security highlight best practices for evolving codebases while future-focused sections anticipate trends and emerging paradigms in the Jest ecosystem. Whether you’re leading a large engineering organization or refining your team’s testing approaches, this book delivers the technical depth, practical advice, and foresight required for excellence in state-of-the-art JavaScript testing.
TypeScript 4 Design Patterns and Best Practices
Author: Theo Despoudis
language: en
Publisher: Packt Publishing Ltd
Release Date: 2021-09-15
A detailed and easy-to-follow guide to help you improve your TypeScript development skills and enable you to solve application design problems using modern practices Key Features Identify common gotchas and antipatterns when developing TypeScript applications and understand how to avoid them Discover expert techniques and best practices in developing large-scale TypeScript applications Explore advanced design patterns taken from functional programming and reactive programming Book Description Design patterns are critical armor for every developer to build maintainable apps. TypeScript 4 Design Patterns and Best Practices is a one-stop guide to help you learn design patterns and practices to develop scalable TypeScript applications. It will also serve as handy documentation for future maintainers. This book takes a hands-on approach to help you get up and running with the implementation of TypeScript design patterns and associated methodologies for writing testable code. You'll start by exploring the practical aspects of TypeScript 4 and its new features. The book will then take you through the traditional gang of four (GOF) design patterns in their classic and alternative form and show you how to use them in real-world development projects. Once you've got to grips with traditional design patterns, you'll advance to learning about their functional programming and reactive programming counterparts and how to couple them to deliver better and more idiomatic TypeScript code. By the end of this TypeScript book, you'll be able to efficiently recognize when and how to use the right design patterns in any practical use case and gain the confidence to work on scalable and maintainable TypeScript projects of any size. What you will learn Understand the role of design patterns and their significance Explore all significant design patterns within the context of TypeScript Analyze, and develop classical design patterns in TypeScript Find out how design patterns differ from design concepts Understand how to put the principles of design patterns into practice Discover additional patterns that stem from functional and reactive programming Who this book is for If you're a TypeScript developer looking to learn how to apply established design patterns to solve common programming problems instead of reinventing solutions, you'll find this book useful. You're not expected to have prior knowledge of design patterns. Basic TypeScript knowledge is all you need to get started with this book.
React 17 Design Patterns and Best Practices
Author: Carlos Santana Roldán
language: en
Publisher: Packt Publishing Ltd
Release Date: 2021-05-17
Build scalable, maintainable, and powerful React web apps with design patterns and insightful best practices Key Features Make the most of design patterns in React – including render props and controlled and uncontrolled inputs Master React Hooks with the help of this updated third edition Work through examples that can be used to create reusable code and extensible designs Book DescriptionFilled with useful React patterns that you can use in your projects straight away, this book will help you save time and build better web applications with ease. React 17 Design Patterns and Best Practices is a hands-on guide for those who want to take their coding skills to a new level. You’ll spend most of your time working your way through the principles of writing maintainable and clean code, but you’ll also gain a deeper insight into the inner workings of React. As you progress through the chapters, you’ll learn how to build components that are reusable across the application, how to structure applications, and create forms that actually work. Then you’ll build on your knowledge by exploring how to style React components and optimize them to make applications faster and more responsive. Once you’ve mastered the rest, you’ll learn how to write tests effectively and how to contribute to React and its ecosystem. By the end of this book, you'll be able to avoid the process of trial and error and developmental headaches. Instead, you’ll be able to use your new skills to efficiently build and deploy real-world React web applications you can be proud of.What you will learn Get to grips with the techniques of styling and optimizing React components Create components using the new React Hooks Use server-side rendering to make applications load faster Get up to speed with the new React Suspense technique and using GraphQL in your projects Write a comprehensive set of tests to create robust and maintainable code Build high-performing applications by optimizing components Who this book is for This book is for web developers who want to understand React better and apply it to real-life app development. You’ll need an intermediate-level experience with React and JavaScript before you get started.