Testing

Testing with Mocha, Chai, Enjyme and Sinon

Mocha

Mocha is a javascript test framework which supports asynchronous testing, test coverage reports and use of any assertion library.

Chai

Chai is a BDD/TDD assertion library

Enzyme

Enjyme is a javascript testing utility for React that makes it easier to traverse and manipulate react component’s output

Sinon

Sinon is used for Spies/Stubs/Mocks. It can also fake ajax calls and timers. So basically it allows you solve problems which occur due to external dependencies.

Spies - offers information about function cals
Stubs - Which are like spies but completely replace the functions
Mocks - It replaces the whole object by combining spies and stubs

Adding Mocha, Chai, Enjyme and Sinon to the project

yarn add --dev chai
yarn add --dev enzyme
yarn add --dev enzyme-adapter-react-16
yarn add --dev mocha
yarn add --dev @types/chai
yarn add --dev @types/enzyme
yarn add --dev @types/enzyme-adapter-react-16
yarn add --dev @types/mocha
yarn add --dev chai enzyme enzyme-adapter-react-16 mocha
yarn add --dev @types/chai @types/enzyme @types/enzyme-adapter-react-16 @types/mocha
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