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XMLHttpRequest testing in Jest

rated 0 times [ 1] [ 1] / answers: 1 / hits: 29667 / 9 Years ago, wed, february 18, 2015, 12:00:00

I want to test AJAX methods (vanilla XHR) and I can't find the way to do it with Jest framework. I found mock-ajax.js for Jasmine. The problem is I can't find the way to install it.

Is there maybe a better way to unit test Ajax functions in Jest?

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josuea

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answered 9 Years ago julieth · Accepted Answer

The jest api has changed a bit. This is what I use. It doesn't do anything but it's enough to render my components.

const xhrMockClass = () => ({

  open            : jest.fn(),

  send            : jest.fn(),

  setRequestHeader: jest.fn()

})



window.XMLHttpRequest = jest.fn().mockImplementation(xhrMockClass)

and in the test file:

import '../../__mock__/xhr-mock.js'