text: import contextlib
  import io
  import fizz_buzz
  
  f = io.StringIO()
  with contextlib.redirect_stdout(f):
      fizz_buzz.fizz_buzz(16)
  
  output = f.getvalue()
  
  expected_output = \
      """1
  2
  Fizz
  4
  Buzz
  Fizz
  7
  8
  Fizz
  Buzz
  11
  Fizz
  13
  14
  FizzBuzz
  16
  """
  
  assert output.lower() == expected_output.lower(), f"Expected output: {expected_output}"
  