@Test public void consume() {

    CharacterReader r = new CharacterReader("one");
    assertEquals(0, r.pos());
    assertEquals('o', r.current());
    assertEquals('o', r.consume());
    assertEquals(1, r.pos());
    assertEquals('n', r.current());
    assertEquals(1, r.pos());
    assertEquals('n', r.consume());
    assertEquals('e', r.consume());
    assertTrue(r.isEmpty());
    assertEquals(CharacterReader.EOF, r.consume());
    assertTrue(r.isEmpty());
    assertEquals(CharacterReader.EOF, r.consume());
}