PacDataInputStream pdis = createInputStream(data);
        byte[] buffer = new byte[4];
        pdis.readFully(buffer);
        assertArrayEquals(data, buffer);
    }

    @Test
    public void testReadFullyWithOffset() throws IOException {
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        PacDataInputStream pdis = createInputStream(data);
        byte[] buffer = new byte[6];
        pdis.readFully(buffer, 1, 4);