`window` is not being exposed to Jest

Question

I have a test that imports a component that in turn imports a helper file that uses the window object to pull out a query string parameter. I get the following erro

Answer 1

You can simply mock location:

global.location = {search: 'someSearchString'}

Also note, that global in your test is the global context for the file to test (global === window)

Note this will only work if your module make the window.location call after the test has been finishing import all the modules.

export default () => window.location

So if your module looks like this:

const  l = window.location
export default l 

it will not work. In this case you could mock the module using jest.mock.