pdis = createInputStream(new byte[] { 0x01, 0x02, 0x03, 0x04 });
        pdis.readByte(); // position is 1
        pdis.align(0);
        assertEquals(3, pdis.available());
    }

    @Test
    public void testAvailable() throws IOException {
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        PacDataInputStream pdis = createInputStream(data);
        assertEquals(4, pdis.available());
        pdis.readByte();