@Test
public void testContainsControlCharacter() {

    assertFalse(StringUtils.containsControlCharacter("abcd"));
    assertFalse(StringUtils.containsControlCharacter("abc td"));
    assertFalse(StringUtils.containsControlCharacter("abc2345423540908d"));
    assertFalse(StringUtils.containsControlCharacter("abcd!@#$#@%$$^%&%*()_+=="));
    assertFalse(StringUtils.containsControlCharacter("abc\\][\\|}{|}d"));
    assertFalse(StringUtils.containsControlCharacter("abc\":\":\";;';';;d"));
    assertFalse(StringUtils.containsControlCharacter("ab,./<>?cd"));
    assertFalse(StringUtils.containsControlCharacter("abcd`~!@#$%^&*()_+-="));
    
    assertTrue(StringUtils.containsControlCharacter("abc\t"));
    assertTrue(StringUtils.containsControlCharacter("abc\n"));
    assertTrue(StringUtils.containsControlCharacter("abc\b"));
    assertTrue(StringUtils.containsControlCharacter("abc\r"));
    assertTrue(StringUtils.containsControlCharacter("abc\t\r\b\t\n"));
}