We're going to describe the isRealString function. Then we can add our arrow function (=>), and inside there, we can go ahead and provide our individual test cases, it, and I'm going to copy it directly, should reject non-string values:
describe('isRealString', () => { it('should reject non-string values')});
This is going to be a synchronous test, so there's no reason to add the done argument. Inside here, we're going to pass in a non-string value. I'll make a variable called response, which will store the return result from isRealString. We're going to call it passing in some sort of non-string value. Anything would work, I'm going to use a number, 98:
describe('isRealString', () => { it('should ...
