// but should be wrapped in PACDecodingException
        assertThrows(Exception.class, () -> new Pac(pacData, keys));
    }

    @Test
    void testZeroBufferCount() throws IOException {
        // Test PAC with zero buffers (missing required buffers)
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        writeLittleEndianInt(baos, 0); // bufferCount = 0