text: // help testing the formatted text of an error message.
  // assertMatch(/Cannot read property/, errorThrown(testFunction))
  export default function errorThrown (fn)
  {
  	let message = 'nothing thrown'
  	try {
  		fn()
  	}
  	catch (error)
  	{
  		message = error
  	}
  
  	return message
  }
  
  