Using “table” in method it.each of Jest test.each`table`(name, fn, timeout) 1 2 3 4 5 … Read more

The problem with mutation of object data in Jest Let’s say we have some method that just … Read more

Test of async method in Jest An example of code: 1 2 3 4 5 6 7 8 9 10 module.exports = { … Read more

Stub Contains specific rules like: if parameters are x1, x2 then result is y (2, 3) => [5] … Read more

Spy (in testing) Method that is spying on some function (that you need) It is tracking … Read more

Debugging in Jest Add breakpoint in test: 1 2 3 4 5 6 7 8 it.each` a | b | result ${1}| ${2}| … Read more

Sinon.js The library that provides the ability to write Mocks, Stubs, Spies It works with any … Read more

Rewire The library that provides the ability to do monkey-patching Links GitHub repo Read more

mocha.js Mocha is a JavaScript test framework running on Node Links mochajs.org Read more

JSDOM JSDOM is a JavaScript implementation of Document Object Model and Browser Object Model for … Read more

HTML HTML (HyperText Markup Language) is a markup language for document that are displayed in … Read more

Fixtures In Front End It’s fake data that replaces data from API (back end) responses … Read more

Domain Driven Design Read more

Document Object Model DOM is a programming interface for HTML and XML documents. Links … Read more

Chai.js The assertion library that can be used with any JavaScript testing framework. Links … Read more

Browser Object Model BOM is a browser’s API interfaces Additional objects, provided by … Read more

Behavior Driven Development The concept provides the ability to write test by kind of human … Read more

ava.js Ava is a JavaScript test runner for Node Links GitHub repo Read more

Assertion It provides the ability to write code in test to check expected value and output value … Read more

Arrange in unit test Preparing to acting of tests All errors in this phase are not actually … Read more