Testing For Developers
The skill juniors always skip and seniors always ask about: write real tests with Jest, React Testing Library, and Cypress.
Go read ten junior developer job postings right now. Testing shows up in most of them, and yet almost no beginner course teaches it. The result is a hiring market full of candidates who can build a feature but cannot prove it works, applying for jobs that explicitly ask for the thing they skipped.
This course fixes that gap with the three layers of testing you will actually use.
Unit tests first, because everything builds on them
After a quick grounding in static testing, you set up Jest and write your first real test. Then the workflow features that make test suites manageable instead of messy: grouping with describe, running just one test with only or skipping with skip, generating tests in loops, and using beforeEach and afterEach to set up and tear down cleanly. Small tools, but they are the difference between a test file you maintain and one you abandon.
Then components, then the whole app in a browser
The React section gets practical fast: you build a login component, learn to query elements the way a user would find them, and fire events to test what happens when someone actually clicks and types. Integration testing gets covered as a concept, so you know what lives between unit tests and the full system.
Then Cypress, which is the fun part. Your tests open a real browser and use your app like a human: create an account, log in, land on the homepage as a logged-in user. You learn to break a page down into testable behaviors, and, in a running theme, to lean on the documentation, because Cypress's docs are genuinely good and knowing your way around them is the skill.
Fair warning about scope: this is a hands-on introduction across the testing stack, not an exhaustive theory course. You leave able to set up and write tests at all three layers, which is more than most working juniors can do.
Shore up JavaScript fundamentals first if you need to, and if the React section is your weak spot, the React JS job ready course will get you comfortable with components before you start testing them.
What you'll learn
- ✓ Understand static testing and where it fits before any test runs
- ✓ Set up Jest and write your first unit tests
- ✓ Organize tests with describe blocks, skip and only, loops, and beforeEach and afterEach hooks
- ✓ Test React components by querying elements and firing events on a real login component
- ✓ Understand what integration testing covers between units and the full app
- ✓ Set up Cypress and break a page down into end-to-end tests
- ✓ Write E2E tests for account creation, login, and logged-in behavior
Course Curriculum
7 sections
1
First Section
0 lessons
2
Static Testing
0 lessons
3
Unit Testing
0 lessons
4
Testing React Components
0 lessons
5
Integration Testing
0 lessons
6
End To End Testing
0 lessons
7
More Videos
0 lessons
Before you start
- ✓ Solid JavaScript fundamentals
- ✓ Some React experience helps for the component testing section
