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Mastering Jest: A Complete Guide to Testing

Name: Mastering Jest: A Complete Guide to Testing
Price: 59 USD
Author: Bryn Bennett

Gain insights into Jest, a versatile testing framework. Learn about fundamental and advanced testing techniques, from unit tests to CI/CD integration, for comprehensive JavaScript application testing.

4.5

52 lessons

2 projects

12h

Created by Bryn Bennett

Mastering Jest: A Complete Guide to Testing

What's included

52 lessons across 14 modules
8 quizzes with instant feedback
2 projects in preconfigured environments
AI Tutor on every lesson

Join 3.1 million developers at

What You'll Learn

Hands-on experience with writing clean and meaningful tests for any JavaScript code
An understanding of the best practices for writing JavaScript tests
Working knowledge of implementing testing coverage requirements in an application
Familiarity with mocking the internal and external dependencies for testing
The use of integrated test suites with a CI/CD pipeline
Configuration of a testing environment for your needs

Learning Roadmap

52 Lessons2 Projects8 Quizzes

Introduction

Get familiar with Jest, a JavaScript testing framework, and its three primary test types.

Test with Jest

Types of Tests in Jest

Setting Up Jest

Look at configuring Jest for TypeScript, structuring tests, and effective debugging techniques.

Jest and TypeScript

The Composition of a Test

Debugging the Tests

Quiz on Jest Fundamentals

Jest Matchers

5 Lessons

Break apart common matchers, error handling, Jest Extended, and creating custom matchers in Jest.

Writing Unit Tests

5 Lessons

Break down complex ideas for structuring, enhancing, and illustrating unit tests with Jest.

Writing Snapshot Tests

4 Lessons

Deepen your knowledge of snapshot testing in Jest to ensure UI consistency and accuracy.

Asynchronous Code

5 Lessons

See how it works to test asynchronous code in Jest using callbacks, promises, and async/await.

Mocking

6 Lessons

Practice using mocking to simulate external dependencies for focused and isolated test environments.

Mocking External Libraries

8 Lessons

Break down the essential methods for mocking various external libraries with Jest.

Working with Jest Mocks

Project

Setup & Teardown

4 Lessons

Walk through test isolation, setup, and teardown in Jest for reliable test environments.

10.

Test Coverage & CI/CD Pipelines

4 Lessons

Work your way through test coverage essentials and CI/CD integration using GitHub Actions and CircleCI.

Test Coverage in Jest

Project

11.

Conclusion

Enhance your skills in applying Jest to improve testing practices and developer productivity.

Conclusion

12.

Bonus: Best Practices

Solve problems in Jest by focusing on isolation, mocking dependencies, and maintaining test coverage.

Best Practices for Testing with Jest

13.

Bonus: Resources for Continued Learning

Investigate recommended resources like Jest documentation, blog articles, and integration guides.

Recommended Resources

14.

Appendix

2 Lessons

Master the steps to install, configure, and run Jest tests efficiently using various commands and options.

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

About this course

WHY I WROTE THIS COURSE

Jest is a framework for testing applications developed in JavaScript. It has a well-documented and well-maintained range of tools to run tests in parallel. It is simple and works with projects using Babel, TypeScript, Node, React, Angular, Vue, etc. It works well for both client and server testing. This course covers Jest in-depth and is agnostic of any specific JavaScript framework. The course begins with the fundamentals of Jest testing, deconstructing the components of a test and covering how to compose basic unit tests and snapshot tests with Jest correctly. Next, it shows the testing of asynchronous code and the code that relies on external dependencies. Lastly, this course illustrates how Jest testing can effectively integrate into the real-world software development cycle through CI/CD pipeline. It gives you hands-on experience in setting up Jest, types of testing, testing coverage, mocking, and native tooling depth.

ABOUT THE AUTHOR

Bryn Bennett

Hi, I'm Bryn. I'm a full-stack engineer at Sensible Weather, a climatech startup based in Los Angeles, CA where I have spent the past 3 years helping to shape, expand and maintain the frontend ecosystem, as well as learning the nuances of climate science.

Learn more about Bryn

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