// Verify capacity calculation: alloc * sectPerAlloc * bytesPerSect
        long expectedCapacity = alloc * sectPerAlloc * bytesPerSect;
        assertEquals(expectedCapacity, smbInfoAllocation.getCapacity());

        // Verify free space calculation: free * sectPerAlloc * bytesPerSect
        long expectedFree = free * sectPerAlloc * bytesPerSect;
        assertEquals(expectedFree, smbInfoAllocation.getFree());

                throws SMBProtocolDecodingException {
            // Given
            ByteBuffer buffer = ByteBuffer.allocate(24);
            buffer.order(ByteOrder.LITTLE_ENDIAN);
            buffer.putLong(alloc);
            buffer.putLong(free);
            buffer.putInt(sectPerAlloc);
            buffer.putInt(bytesPerSect);

            buffer.putInt(sectPerAlloc);
            buffer.putInt(bytesPerSect);
            byte[] bufferArray = buffer.array();

            // When
            int bytesConsumed = fileFsFullSizeInfo.decode(bufferArray, 0, bufferArray.length);

            // Then
            assertEquals(32, bytesConsumed);
            assertEquals(alloc * sectPerAlloc * bytesPerSect, fileFsFullSizeInfo.getCapacity());

            // Prepare test buffer with sample data
            byte[] buffer = new byte[24];
            // Skip idFileSystem (4 bytes)
            buffer[4] = 0x08; // sectPerAlloc = 8
            buffer[8] = 0x00;
            buffer[9] = 0x10; // alloc = 4096
            buffer[12] = 0x00;
            buffer[13] = 0x08; // free = 2048
            buffer[16] = 0x00;

        byte[] buffer = new byte[100];
        int offset = 0;

        // idFileSystem (4 bytes) - skipped in decode
        SMBUtil.writeInt4(0, buffer, offset);
        offset += 4;

        // sectPerAlloc (4 bytes)
        SMBUtil.writeInt4(8, buffer, offset);
        offset += 4;

        // alloc (4 bytes)
        SMBUtil.writeInt4(1000000, buffer, offset);
        offset += 4;