overleaf/services/web/test/frontend/features/chat/components/stubs.js

import sinon from 'sinon'

export function stubMathJax() {
  window.MathJax = {
    Hub: {
      Queue: sinon.stub(),
      config: { tex2jax: { inlineMath: [['$', '$']] } }
    }
  }
}

export function tearDownMathJaxStubs() {
  delete window.MathJax
}