ReferenceError: BroadcastChannel is not defined using jest testing libray

Question

I'm getting error while runing the jest test case using react-testing library

Answer 1

I have resolved it in following way

step 1: I have created config/jest.setup.js in root folder and pasted below code in jest.setup.js file

function channelMock() {}
channelMock.prototype.onmessage = function () {}
channelMock.prototype.postMessage = function (data) {
    this.onmessage({ data })
}
global.BroadcastChannel = channelMock

step 2: In package.js file we need to add this file path in following way

"jest": {
        "setupFilesAfterEnv": [
            "./config/jest.setup.js"
        ]
    },

step 3: then you can run the test case using

npm run test

Issue resolved