As a reminder, this project is being built upon the following starter project on <ahref='https://glitch.com/#!/import/github/freeCodeCamp/boilerplate-mochachai/'>Glitch</a>, or cloned from <ahref='https://github.com/freeCodeCamp/boilerplate-mochachai/'>GitHub</a>.
#property asserts that the actual object has a given property.
testString: getUserInput => $.get(getUserInput('url') + '/_api/get-tests?type=unit&n=15').then(data => { assert.equal(data.assertions[0].method, 'notProperty', 'A car has not wings'); }, xhr => { throw new Error(xhr.responseText); })