@Test
public void hasAtleastOneLetter_shouldReturnFalse_whenStringDoesnotHasAtleastOneLetter() throws
    Exception {

  assertEquals(false, validateTor.hasAtleastOneLetter("123456"));
  assertEquals(false, validateTor.hasAtleastOneLetter("11#$"));
  assertEquals(false, validateTor.hasAtleastOneLetter("#$%^&"));
}