window.crypto is undefined

i’m trying to run tests using jsdom and mocha but I got this error:

ReferenceError: crypto is not defined

Is crypto really defined in jsdom?

[detj]

I used @peculiar/webcrypto in jest setupFiles

// jest.setup.js
import { Crypto } from "@peculiar/webcrypto"

global.crypto = new Crypto()

Seems to be working fine.

[nealeu]

If you only require random numbers to be polyfilled, then you can also do

var nodeCrypto = require('crypto');
global.crypto = {
    getRandomValues: function(buffer: T) { return nodeCrypto.randomFillSync(buffer);}
};

Note: You’ll need Node v10 if you want buffer to be able to be Uint32Array as in v8 only Uint8Array and Buffer are supported