PacDataInputStream pdis = createInputStream(data);
        assertThrows(PACDecodingException.class, () -> pdis.readString());
    }

    @Test
    public void testReadId() throws IOException, PACDecodingException {
        // RID = 0x12345678 (305419896 in decimal, little-endian)
        byte[] data = new byte[] { 0x78, 0x56, 0x34, 0x12 };