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>.
#isString asserts that the actual value is a string.
testString: 'getUserInput => $.get(getUserInput("url") + "/_api/get-tests?type=unit&n=12").then(data => { assert.equal(data.assertions[0].method, "isNotString", "A float number is not a string"); }, xhr => { throw new Error(xhr.responseText); })'