Fizzbuzz questions - job interview rejected
You don't use counter, isFizz() or isBuzz(), testFizzBuzz() calls to a fizzBuzz method which doesn't appear to exist. (Passing a boolean argument which seems illogical).
Your code is formatted well, but the points above mean that a reviewer would doubt your competence.
Have you shown us all your code? If not, why not?
Did you compile, run and test your code? If not, why not?