Error: Invariant Violation: dangerouslyRenderMarkup(…): Cannot render markup in a worker thread

Question

React Tests Fails after set State causes second render

Up until now testing has been going well with JSDOM and Mocha. So far have not had to test any components t

Answer 1

Insert your global object modifying(passing window and document objects to global) before React is required. Because React creates its ExecutionEnvironment object while required and don't modify it while works.

Answer 2

The setup JSDOM setup was missing global.navigator.

global.navigator = {
   userAgent: 'node.js'
};