@Test
public void contains() {

	final CharSeq set = new CharSeq(CharSeq.expand("a-z"));
	Assert.assertTrue(set.contains('t'));
	Assert.assertTrue(set.contains('a'));
	Assert.assertTrue(set.contains('z'));
	Assert.assertFalse(set.contains('T'));
	Assert.assertFalse(set.contains('1'));
	Assert.assertFalse(set.contains('Z'));
}