sinon-chai

I am trying to test localStorage using sinon. Basically I am very new to unit testing so this might be very basic. Update I managed to come up with this but now its giving me a new error Should wrap property of object Test describe('Initial State', () => { it('should set the initial state for the component', () => { const props = { currentUser: {} }; sinon.stub(window.localStorage, 'setItem'); window.localStorage.setItem('none', 'nothing'); }); }); Umair Sarfraz I managed to resolve it. Thanks to @anoop because his answer was of help but I had to manage it with a major workaround. I am using