@Test
public void isBoolean_shouldReturnTrue_whenStringIsTrue() throws Exception {

  assertEquals(true, validateTor.isBoolean("true"));
  assertEquals(true, validateTor.isBoolean("True"));
  assertEquals(true, validateTor.isBoolean("TRUE"));
  assertEquals(true, validateTor.isBoolean("TrUe"));
  assertEquals(true, validateTor.isBoolean("false"));
  assertEquals(true, validateTor.isBoolean("False"));
  assertEquals(true, validateTor.isBoolean("FALSE"));
  assertEquals(true, validateTor.isBoolean("fAlSe"));
}