String str = "AbCdEfGhIjKlMnOpQrStUvWxYz";
CharArrayReader a = new CharArrayReader(str.toCharArray());
CharArrayReader b = new CharArrayReader(str.toCharArray());
CharArrayReader c = new CharArrayReader(str.toCharArray());
CharArrayReader d = new CharArrayReader(str.toCharArray());
assertEquals(str, IOUtil.read(a));
assertEquals("AbCdEfGhIj", IOUtil.read(b, 10));
assertEquals("bdfhjlnprtvxz", IOUtil.skipRead(c));
assertEquals("AbCdEfGdEfGhIjKlMnOpQrStUvWxYz", IOUtil.markRead(d, 3, 4));