message: Better output on wrong server exit code
diff: @@ -17,6 +17,9 @@ Object.keys(servers).forEach(function (test) {
  if (test === 'throw' || test === 'uncatch') {
  expect(exit).toEqual(1)
  } else if (test !== 'unbind') {
  + if (exit !== 0) {
  + console.error(test + ' fall with:\n' + out)
  + }
  expect(exit).toEqual(0)
  }
  expect(out).toEqual(snapshot)
  