* @return whether this mechanisms supports integrity
     */
    boolean supportsIntegrity();

    /**
     * Calculates a Message Integrity Code (MIC) for the given data.
     * @param data the data to calculate MIC for
     * @return MIC
     * @throws CIFSException if an error occurs calculating the MIC
     */
    byte[] calculateMIC(byte[] data) throws CIFSException;

        assertEquals(testKey, leaseContext.getLeaseKey());
        assertEquals(testState, leaseContext.getLeaseState());
        assertEquals(0, leaseContext.getLeaseFlags());
    }

    @Test
    @DisplayName("Should calculate correct size")
    void testSize() {
        int expectedSize = 16 + 4 + 4 + 32; // header + name + padding + data
        assertEquals(expectedSize, leaseContext.size());
    }

    @Test

        // Then
        assertNotNull(response);
        assertTrue(response instanceof Smb2NegotiateResponse);
    }

    @Test
    @DisplayName("Should calculate size correctly without contexts")
    void testSizeWithoutContexts() {
        // Given
        when(mockConfig.getMaximumVersion()).thenReturn(DialectVersion.SMB302);

            // When & Then
            assertEquals(Long.MIN_VALUE, allocInfo.getCapacity());
            assertEquals(Long.MIN_VALUE, allocInfo.getFree());
        }

        @Test
        @DisplayName("Should calculate used space correctly")
        void shouldCalculateUsedSpaceCorrectly() {
            // Given
            long capacity = 1024L * 1024L * 1024L * 100L; // 100GB
            long free = 1024L * 1024L * 1024L * 40L; // 40GB

    void testWriteBytesWireFormatHappy() throws UnsupportedEncodingException {
        byte[] buffer = new byte[50];
        int used = cmd.writeBytesWireFormat(buffer, 0);
        // Calculate expected size: 1 byte for command + string bytes + 1 null terminator
        byte[] expectedString = "testfile.txt".getBytes("windows-1252");

            assertEquals(0, decoded.getHashAlgos().length);
            assertEquals(0, decoded.getSalt().length);
        }

        @Test
        @DisplayName("Should calculate size correctly")
        void testSizeCalculation() {
            // Test with various combinations
            context = new PreauthIntegrityNegotiateContext(mockConfig, new int[3], new byte[32]);

        final long totalBytes = runtime.totalMemory();
        return totalBytes - freeBytes;
    }

    /**
     * Estimates the size of an object in bytes.
     *
     * @param obj the object to calculate size for
     * @return estimated size in bytes
     */
    public static long sizeOf(final Object obj) {
        if (obj == null) {
            return 0L;
        }
        if (obj instanceof String) {

    TF_RETURN_IF_ERROR(
        ops::Sub(ctx, fPlus.get(), fMinus.get(), f_outputs, "sub_top"));
    AbstractTensorHandlePtr fDiff(f_outputs[0]);

    // Calculate using the difference quotient definition:
    // (f(theta + eps) - f(theta - eps)) / (2 * eps).
    TF_RETURN_IF_ERROR(
        ops::Div(ctx, fDiff.get(), two_eps.get(), f_outputs, "diff_quotient"));

        }
    }

    @Nested
    @DisplayName("Size Calculation Tests")
    class SizeCalculationTests {

        @Test
        @DisplayName("Should calculate size8 without alignment")
        void testSize8NoAlignment() {
            assertEquals(8, ServerMessageBlock2.size8(8));
            assertEquals(16, ServerMessageBlock2.size8(9));

	stringToSign += scope + "\n"
	canonicalRequestBytes := sha256.Sum256([]byte(canonicalRequest))
	stringToSign += hex.EncodeToString(canonicalRequestBytes[:])
	return stringToSign
}

// getSigningKey hmac seed to calculate final signature.
func getSigningKey(secretKey string, t time.Time, region string, stype serviceType) []byte {
	date := sumHMAC([]byte("AWS4"+secretKey), []byte(t.Format(yyyymmdd)))
	regionBytes := sumHMAC(date, []byte(region))