Testing terms / technologies

Browser tests / E2E

Technologies:

Selenium based libraries (Protractor, Nightwatch etc.).
Chrome devtools based (Puppeteer).
Karma*

Tests are running in node environment, while production code is running on a real / headless browser.

Test use cases:

browser dependent stuff (scrolling, measurements etc.)
Navigation
API calls

Component tests

Technologies:

Mocha / Jest

Running tests in node environment, using JSDOM to mimic the browser

Test use cases:

React components

Unit tests

Running tests on small units, using node environment

Test use cases:

Test specifig app logic

IT tests

Running tests on API endpoints, using node