Jest URL.createObjectURL is not a function

Question

I\'m developping a reactJs application. I\'m using jest to test my application. I want to test a function that download a blob.

But unfortunately I receve this error

Answer 1

jsdom, the JavaScript implementation of the WHATWG DOM used by jest doesn't implement this method yet.

You can find an open ticket about this exact issue on their github page where some workarounds are provided in comments. But if you need the blobURL to actually work you'll have to wait this FR is solved.

Workaround proposed in the comments of the issue for jest:

function noOp () { }
if (typeof window.URL.createObjectURL === 'undefined') { 
  Object.defineProperty(window.URL, 'createObjectURL', { value: noOp})
}