public void Should_return_buzz_if_divisible_by_five()
 {
     _fizzCheck.Check(3).Should().Be("Fizz");
     _fizzCheck.Check(12).Should().Be("Fizz");
     _fizzCheck.Check(18).Should().Be("Fizz");
 }
 public void Should_return_buzz_if_divisible_by_five()
 {
     _buzzCheck.Check(5).Should().Be("Buzz");
     _buzzCheck.Check(10).Should().Be("Buzz");
     _buzzCheck.Check(25).Should().Be("Buzz");
 }