Front-end JS unit test using Mocha, Chai, Sinon,karma

Karma (karma) provides on-browser testing can run in multiple browsers at the same time

Mocha Test framework other test frameworks and Jasmine

Chai Assertion Library expect = Chai. Expect

Sinon test surrogates (fake or simulated real-world) API http://sinonjs.org/releases/v4.4.8/stubs/

Spy Spy Spy=sinon.spy (obj,method) handling

Stub stub=sinon.stub (Obj,method) replaces those external calls that make the test slow and difficult to test Stub.callsfake (() =>{//give results})

Mock

Front-end JS unit test using Mocha, Chai, Sinon,karma