}
    }

    @Nested
    @DisplayName("FileFsSizeInformation Implementation Tests")
    class FileFsSizeInformationTests {

        private FileFsSizeInformation fileFsSizeInfo;

        @BeforeEach
        void setUp() {
            fileFsSizeInfo = new FileFsSizeInformation();
        }

        @Test
        @DisplayName("Should return correct information class")

        assertEquals(offset, bytesRead);
        assertNotNull(response.getInfo());
        assertTrue(response.getInfo() instanceof FileFsSizeInformation);

        FileFsSizeInformation info = (FileFsSizeInformation) response.getInfo();
        assertEquals(1000000L * 8L * 512L, info.getCapacity());
        assertEquals(500000L * 8L * 512L, info.getFree());
    }

    @Test

import jcifs.internal.AllocInfo;
import jcifs.internal.SMBProtocolDecodingException;

/**
 * Test suite for FileFsSizeInformation class
 */
class FileFsSizeInformationTest {

    private FileFsSizeInformation fileFsSizeInfo;

    @BeforeEach
    void setUp() {
        fileFsSizeInfo = new FileFsSizeInformation();
    }

    @Nested
    @DisplayName("Interface Implementation Tests")

        // Set buffer offset
        SMBUtil.writeInt2(20, buffer, bufferIndex + 2);
        // Set buffer length (FileFsSizeInformation is 24 bytes)
        SMBUtil.writeInt4(24, buffer, bufferIndex + 4);

        response = spy(response);
        when(response.getHeaderStart()).thenReturn(0);

        // Write FileFsSizeInformation data (24 bytes)
        SMBUtil.writeInt8(1000000, buffer, 20); // Total allocation units