Jest and Enzyme: Unit testing in React in 2021

Unit testing in React has evolved significantly by 2021, with tools like Jest and Enzyme playing a crucial role in reducing coding errors significantly before production. These tools provide an accessible framework for developers to perform reliable and thorough testing of React component trees and functions, thereby ensuring the integrity of applications. The article details the process of setting up unit tests using Jest and Enzyme, emphasizing the importance of writing good unit tests and adhering to coding best practices, such as splitting code into testable functions and avoiding cluttered code. It highlights the integration of unit tests in continuous integration systems like Circle CI and Gitlab CI, which helps maintain application health by preventing unexpected failures. Additionally, the use of code coverage tools, such as those offered by Jest, is recommended to ensure comprehensive testing of all source code. The article underscores the significance of logging and reporting in testing, suggesting the use of tools like LogRocket for error tracking and enhancing digital experiences.