React Testing Library with Jest / Vitest from Udemy

Major course updates in November 2023.

Projects are written in Vite, a lightweight and lightning-fast base for React apps
Projects use Vitest, a test framework that's much faster than JestNote: Vitest code syntax is identical to Jest; all code presented in the course works with both Vitest and Jest.
The course presents Mock Service Worker v2 syntax, which was released in October 2023.

React Testing Library has become an extremely popular option for testing React, and with good reason. This detailed, comprehensive course provides a solid foundation for React app tests.

Best Practices

React Testing Library is famously opinionated about testing best practices, and is written to encourage these best practices. This course teaches:

testing behavior over testing implementation
tests that interact with your app the way a user would
finding elements by accessibility handles, to make sure your code is accessible as possible

Broad range of testing examples

The course apps start very with very simple examples (clicking a button to change its color) and work up to progressively more complicated testing concepts, such as:

testing asynchronous page changes
simulating data from a server using Mock Service Worker
applying a context provider to a component when rendering

The course builds up to complex concepts gradually, in a way designed to support your learning and ensure your success.

Practice your new skills

You will also have plenty of opportunities to practice what you’ve learned. The course provides "code quizzes" while building the course projects, where you can apply what you learned and then watch a video to see the solution. The (optional) final section provides even more exercises to complete the second app and reinforce concepts from the course.

Optional React lectures

Any significant React code covered in the course is isolated into separate lectures. Students have a choice: those who want to reinforce their React skills (or learn new ones. ) can watch those lectures, while students who feel confident in their React skills can skip them.

Supportive Instructor

The instructor has a proven track record of responding to course Q&A in a helpful and supportive way. She loves to engage with students, answer questions about course concepts, and help debug students' code for the course projects.

What's inside

Syllabus

Introduction

Introduction to React Testing Library and Jest / Vitest

Link to course GitHub repo

First Test with Testing Library

Traffic lights

Read about what's good

what should give you pause

and possible dealbreakers

Uses React Testing Library, which encourages testing behavior over testing implementation, aligning with modern testing best practices and improving code quality

Employs Mock Service Worker v2 syntax, which was released in October 2023, ensuring learners are exposed to the latest tools and techniques for simulating server interactions

Projects are written in Vite, a lightweight and lightning-fast base for React apps, offering a modern and efficient development experience

Projects use Vitest, a test framework that's much faster than Jest, though the code syntax is identical, providing learners with flexibility and performance benefits

Includes optional React lectures, allowing students to reinforce their React skills or learn new ones, catering to different levels of React proficiency

Teaches testing asynchronous page changes, simulating data from a server using Mock Service Worker, and applying a context provider, which are essential skills for modern web development

Reviews summary

Practical react testing with rtl

According to learners, this course provides a practical and hands-on approach to testing React applications using React Testing Library, Jest, and Vitest. Students particularly appreciate the focus on testing behavior over implementation, which aligns with industry best practices. The course structure, building from simple examples to complex scenarios like asynchronous operations and API mocking with MSW, is frequently highlighted as a strength. Many find the code quizzes and optional exercises helpful for practicing concepts. The instructor's supportive and responsive Q&A is also noted.

Covers current libraries and practices (Vitest, MSW v2).

"Appreciate that it was updated to include Vitest and MSW v2."

"Using Vite instead of Create React App is a welcome modern touch."

"It's great that the course stays current with recent library updates."

Practice opportunities reinforce learning.

"The code quizzes embedded in the lectures are fantastic for practice."

"Optional exercises provided great additional practice to solidify my understanding."

"Working through the final exam project really tied everything together."

Builds from simple to more advanced topics.

"I liked how the course started simple and gradually introduced more complex concepts."

"Learning async testing and MSW was introduced smoothly."

"The course scaffolding helps build confidence before tackling harder examples."

Concepts are explained clearly and effectively.

"Explanations are clear and easy to follow."

"The instructor does a great job breaking down complex ideas."

"Everything is explained in a very concise way, making it easy to grasp."

Emphasizes hands-on coding and real-world use.

"This course gives a practical approach to using React Testing Library."

"It's very hands-on, which is exactly what I needed to learn RTL."

"The focus on testing behavior with `userEvent` is super practical and useful."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in React Testing Library with Jest / Vitest with these activities:

Review React Fundamentals

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Solidify your understanding of React fundamentals to better grasp how React Testing Library interacts with React components.

Browse courses on React

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Review React component lifecycle methods.
Practice building simple React components.
Study JSX syntax and usage.

Read 'Effective JavaScript'

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Improve your JavaScript skills to write better tests and understand the underlying code being tested.

View Effective JavaScript: 68 Specific Ways to... on Amazon

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Read the book cover to cover.
Try out the examples in the book.
Apply the principles to your test code.

Read 'Testing JavaScript with React and Jest'

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Gain a broader perspective on JavaScript testing with React and Jest to complement the course's focus on React Testing Library and Vitest.

View Testing JavaScript Applications on Amazon

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Read the book cover to cover.
Try out the examples in the book.
Compare the approaches with the course.

Four other activities

Expand to see all activities and additional details

Show all seven activities

Write Tests for Existing Components

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Reinforce your understanding of React Testing Library by writing tests for existing React components from your own projects or open-source repositories.

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Select a React component to test.
Identify the component's key behaviors.
Write tests using React Testing Library.
Run the tests and refactor as needed.

Create a Blog Post on React Testing Library

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Solidify your knowledge and share your insights by writing a blog post explaining key concepts and best practices of React Testing Library.

Show steps

Choose a specific topic within React Testing Library.
Research and gather information.
Write a clear and concise blog post.
Include code examples and explanations.
Publish the blog post online.

Build a Test Suite for a Small React App

Show steps

Apply your skills by building a comprehensive test suite for a small React application using React Testing Library and Vitest.

Show steps

Choose or create a small React app.
Identify all components and their behaviors.
Write tests for each component using RTL.
Run tests and ensure full coverage.

Contribute to React Testing Library Documentation

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Deepen your understanding and contribute to the community by improving the documentation for React Testing Library.

Show steps

Identify areas for improvement in the documentation.
Fork the React Testing Library repository.
Make the necessary changes to the documentation.
Submit a pull request with your changes.

Career center

Learners who complete React Testing Library with Jest / Vitest will develop knowledge and skills that may be useful to these careers:

Software Development Engineer in Test

A Software Development Engineer in Test focuses on creating and executing automated tests to ensure software quality. This course helps you develop a strong foundation in React Testing Library, a tool used to build effective tests for React applications. The course emphasizes testing behavior over implementation, aligning with industry best practices. By learning to simulate user interactions and test asynchronous changes, you will gain skills necessary for a software development engineer in test. Understanding how to apply context providers and simulate server responses using Mock Service Worker, taught in the course, are particularly helpful when testing complex components and data flow. Mock Service Worker v2 syntax in particular is very useful in this role.

See salaries and explore the career path for Software Development Engineer in Test

Test Automation Engineer

A Test Automation Engineer designs, develops, and maintains automated test scripts to validate software functionality. This course provides hands-on experience with React Testing Library, a popular tool for writing effective tests. The course covers best practices, teaching you to interact with your app the way a user would, which is crucial for creating robust and reliable automated tests. You will learn how to test asynchronous page changes and simulate data from a server, essential skills for anyone in test automation. Furthermore, using accessibility handles for element selection, as taught in this course, helps ensure your tests are maintainable and your application is accessible. The course's use of Vite will also feel familiar in the professional world.

See salaries and explore the career path for Test Automation Engineer

Quality Assurance Engineer

A Quality Assurance Engineer is responsible for ensuring the quality of software products through testing and analysis. This course helps you gain expertise in React Testing Library, enabling you to write comprehensive tests for React applications. You will learn how to test behavior rather than implementation details, a key principle in modern testing methodologies. The course covers a broad range of testing examples, from simple button clicks to complex asynchronous operations, preparing you for various testing scenarios. Additionally, the course’s emphasis on accessibility testing helps you ensure that the applications you test meet accessibility standards, making the software more usable for everyone. This role would benefit from the attention paid to accessibility.

See salaries and explore the career path for Quality Assurance Engineer

Frontend Developer

A Frontend Developer builds and maintains the user interface of web applications. This course will help you write robust and maintainable code by emphasizing the importance of testing. The course introduces React Testing Library and Jest / Vitest, equipping you with the tools to create comprehensive tests for React components. Understanding how to test behavior, simulate user interactions, and handle asynchronous changes are valuable skills for a frontend developer. By practicing with progressively more complex testing concepts, you will gain confidence in your ability to deliver high-quality, well-tested frontend code. Furthermore, this course offers optional React lectures, which help reinforce your understanding of React concepts and improve your overall development skills. The speed of Vite and Vitest will be particularly appealing.

See salaries and explore the career path for Frontend Developer

Full-Stack Developer

A Full Stack Developer works on both the frontend and backend of web applications. This course will help you enhance your skills in frontend testing, a critical aspect of full stack development. The course provides a solid foundation in React Testing Library, allowing you to write effective tests for React components. You will learn how to simulate server responses, test asynchronous page changes, and apply context providers, all essential skills for building robust and reliable full stack applications. This course ensures that you can deliver high-quality code across the entire stack. Furthermore, the instructor's supportive approach and willingness to help debug code can significantly aid in your learning process. The course's coverage of Mock Service Worker is very useful here.

See salaries and explore the career path for Full-Stack Developer

SDET Lead

An SDET Lead guides and mentors a team of Software Development Engineers in Test, and is responsible for ensuring the quality of software products. This course may help you enhance your expertise in React Testing Library to lead your team effectively towards comprehensive testing for React applications. You will learn how to test behavior rather than implementation details, a key principle in modern testing methodologies which can propagate to a team setting. The course covers a broad range of testing examples, from simple button clicks to complex asynchronous operations, demonstrating various testing scenarios.

See salaries and explore the career path for SDET Lead

Technical Lead

A Technical Lead oversees a team of developers and ensures the technical direction of projects. This course may help you enhance your understanding of React Testing Library, a valuable tool for ensuring the quality of React-based applications. The course emphasizes testing behavior over implementation, which is a key aspect of writing maintainable and effective tests. By understanding how to simulate user interactions and test asynchronous changes, you can better guide your team to build robust and reliable applications. The course's focus on accessibility testing also helps ensure that your team delivers inclusive and user-friendly software. The instructor's supportive approach to debugging is also a great model for junior developers.

See salaries and explore the career path for Technical Lead

Web Application Developer

A Web Application Developer designs, develops, and maintains web applications. This course may be useful in becoming proficient in React Testing Library, which is essential for ensuring the quality and reliability of React-based web applications. The course teaches best practices for testing, such as testing behavior over implementation and interacting with the app as a user would. You will also learn how to test asynchronous changes and simulate data from a server, skills that are critical when developing complex web applications. Furthermore, you will have opportunities to practice your skills through code quizzes and optional exercises, reinforcing your learning. The course's coverage of Vite will improve dev speed.

See salaries and explore the career path for Web Application Developer

UI Engineer

A UI Engineer specializes in building and optimizing user interfaces. This course may help you improve your ability to test user interfaces effectively using React Testing Library. The course emphasizes testing behavior, ensuring that your tests focus on how users interact with the UI. By learning to find elements by accessibility handles, you can ensure that your UI is accessible and user-friendly. The course also covers testing asynchronous page changes and simulating data from a server, which are common scenarios in modern UI development. The optional React lectures can further enhance your understanding of React concepts, improving your overall UI engineering skills.

See salaries and explore the career path for UI Engineer

Software Engineer

A Software Engineer designs, develops, and maintains software systems. This course may be useful for mastering React Testing Library, a skill that enhances your ability to deliver high-quality React applications. The course teaches best practices for testing, such as testing behavior over implementation and interacting with the app as a user would. You will learn how to simulate server responses using Mock Service Worker, apply context providers, and test asynchronous changes, which are essential capabilities for any software engineer working with React. The course's supportive instructor and opportunities for practice can significantly aid in your learning journey. The course's use of Vitest is also a modern choice.

See salaries and explore the career path for Software Engineer

DevOps Engineer

A DevOps Engineer is involved in automating and streamlining the software development lifecycle. While this course primarily focuses on testing React applications, the principles and practices taught can be valuable for a DevOps engineer. Understanding how to implement robust testing strategies and automate testing processes can improve the overall quality and reliability of software deployments. The course's coverage of Mock Service Worker and asynchronous testing can be particularly relevant for simulating real-world scenarios in a continuous integration/continuous deployment (CI/CD) pipeline. Though the course does not cover DevOps topics directly, the testing skills learned here contribute to a smoother, more reliable deployment process.

See salaries and explore the career path for DevOps Engineer

Mobile Application Developer

A Mobile Application Developer focuses on creating applications for mobile devices. While this course is centered around React and web application testing, the fundamental testing principles apply to mobile development as well. Understanding how to write effective tests, simulate user interactions, and handle asynchronous operations are valuable skills for any developer, including those working on mobile applications. The course's emphasis on accessibility testing can also inform your approach to creating accessible mobile applications. Although the specific tools and libraries may differ, the underlying concepts of testing behavior and ensuring quality remain consistent.

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Data Scientist

A Data Scientist analyzes and interprets complex data to help organizations make better decisions. While this course focuses on testing React applications, the critical thinking and problem-solving skills developed through testing can be beneficial in data science. Understanding how to validate assumptions, identify edge cases, and ensure the reliability of data pipelines are all important aspects of data science. Although the specific tools and techniques differ, the underlying principles of rigorous testing and validation remain consistent across both domains. This course may help you develop a more thorough and analytical approach to your work as a data scientist. A rigorous approach to data science is always beneficial.

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Business Analyst

A Business Analyst identifies business needs and translates them into actionable requirements. While this course focuses on software testing, the analytical skills honed through testing can be valuable for a business analyst. Understanding how to identify potential issues, validate assumptions, and ensure the quality of requirements are all important aspects of business analysis. Additionally, the course's emphasis on accessibility can inform your approach to creating inclusive and user-friendly solutions. While the specific tools and techniques differ, the underlying principles of thorough analysis and quality assurance remain consistent. A thorough and careful approach is much appreciated.

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Project Manager

A Project Manager plans, executes, and closes projects within scope, budget, and timeline. While this course focuses on software testing, the understanding of software development lifecycle and quality assurance principles can be valuable for managing software projects. Understanding how testing fits into the development process and the importance of delivering high-quality software will will inform your decisions on how to effectively lead a project in the tech space. Though the course does not cover project management topics directly, the insight into software quality and testing can better inform and lead teams. The instructors' problem debugging skills may also be useful for you.

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React Testing Library with Jest / Vitest

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What's inside

Syllabus

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Reviews summary

Practical react testing with rtl

Activities

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