function shouter(whatToShout) {
  return whatToShout.toUpperCase() + '!!!';
}

// tests

function testShouter() {
  var whatToShout = 'fee figh foe fum';
  var expected = 'FEE FIGH FOE FUM!!!';
  if (shouter(whatToShout) === expected) {
    console.log('SUCCESS: `shouter` is working');
  }
  else {
    console.log('FAILURE: `shouter` is not working');
  }
}

testShouter();