Jest-Webstorage-mock

if using create react app, just import the script in setupTests.ts

import "@sammyeby/jest-webstorage-mock"

then in your tests suites for example: jest.spyOn(localStorage, 'setItem') jest.spyOn(sessionStorage, 'setItem')

Or if you have your own test setup file or created your own mock file for example: myMock.ts, you can just import it in your myMock.ts file

//__jest__/myMock.ts

import "@sammyeby/jest-webstorage-mock"

//...other mocks here...

and then in package.json add below

"jest": { "setupFiles": [ "<rootDir>/__jest__/myMock.ts"],