Testing Next.js Apps with Jest, Testing Library and Cypress
Learn to test a real-world serverless React app with routes, authentication, database and more!
What you will learn
Testing Next . js UI, API, routes, authentication and database interactions
When to use unit testing, integration testing and end-to-end testing -- and why!
Strategies for testing SSG, SSR, ISR and CSR (including cache updates and SWR revalidation intervals)
How to use a test database for tests that involve data fetching and mutations
Learn how to test your Next.js app from top to bottom! Tests provide confidence that your Next.js app won't be released with embarrassing, costly bugs. Employers need developers who know how to write tests!
Comprehensive Next.js App Testing
This course teaches how to test all aspects of a Next.js application, including:
UI unit tests
API unit tests
Data updates (both to the cache and via SWR refresh interval)
End-to-End tests for a complete user flow
The course uses a cross-section of testing technologies, featuring:
React Testing Library
Mock Service Worker
Cypress Testing Library
You'll also learn a wide array of testing techniques, such as:
Using a test database
Jest module mocking
Testing definitions and tradeoffs (not necessarily a technique, but helpful in making decisions about what to test!)
Practice what you've learned
The course includes "code quizzes" -- challenges to write code based on the concepts you've just learned. For more concept-heavy sections (such as testing definitions and guidelines) the course provides multiple-choice quizzes.
Test a pre-written app
A Next.js app has already been written for the course, so the course content can focus on testing. The course tests a popular concert venue app called... Popular Concert Venue (the owners were apparently running low on creativity when they named the place). The app features shows from bands such as The Joyous Nun Riot and Avalanche of Cheese. Randomized, mad-libs style band descriptions and images add to the fun.
The instructor is a proven Udemy veteran, with reputation for clear explanations, Q&A responsiveness, conciseness, and useful practice activities. Here are some reviews from the instructor's other courses:
A great course, probably the best testing course I've ever taken.
After watching other courses on the same topic, this is the first one that I'm actually excited to dig into.
This course exceeded all my expectations. It has the right amount between practice and theory. The teacher is amazing and thoughtful and she answers the students.
I have taken several courses on Udemy, and this is the best one where the teacher doesnt just lecture, but actually structures the class so that I learn the material.
Testing Definitions and Philosophy
Course App and Next.js Data Fetching Strategies
Setting up a Test Database
Testing Next.js Routes (using Cypress)
Testing ISR and Data Updates
Testing Next.js APIs
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