}

        @Test
        @DisplayName("Should get and set credit")
        void testCreditProperty() {
            assertEquals(0, testMessage.getCredit());
            testMessage.setCredit(100);
            assertEquals(100, testMessage.getCredit());
        }

        @Test
        @DisplayName("Should get credit charge")
        void testCreditChargeProperty() {

    class CreditManagementTests {

        @Test
        @DisplayName("Should get granted credits from credit field")
        void testGetGrantedCredits() {
            int credits = 15;
            echoResponse.setCredit(credits);

            assertEquals(credits, echoResponse.getGrantedCredits());
        }
    }

    @Nested
    @DisplayName("Error Code Tests")
    class ErrorCodeTests {

        @Test

        public byte[] getRawPayload() {
            return rawPayload;
        }

        // Helper method to set credit since parent's setter is final
        public void setCreditForTest(int credit) {
            setCredit(credit);
        }

        @Override
        public Smb2SigningDigest getDigest() {
            return digest;
        }

        public void setDigest(Smb2SigningDigest digest) {

     *
     * @return the credit
     */
    public final int getCredit() {
        return this.credit;
    }

    /**
     * Sets the credit count for this message.
     *
     * @param credit
     *            the credit to set
     */
    public final void setCredit(final int credit) {
        this.credit = credit;
    }

    /**

        int credits = 10;

        // When
        request.setRequestCredits(credits);

        // Then
        assertEquals(credits, request.getCredit(), "Credits should be set correctly");
    }

    @Test
    @DisplayName("Test setTid sets tree ID")
    void testSetTid() {
        // Given

        void testSetRequestCredits() {
            int credits = 10;
            testRequest.setRequestCredits(credits);
            assertEquals(credits, testRequest.getCredit());
        }

        @Test
        @DisplayName("setTid should set tree ID")
        void testSetTid() {
            int tid = 12345;
            testRequest.setTid(tid);

    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.SmbNegotiationResponse#getInitialCredits()
     */
    @Override
    public int getInitialCredits() {
        return getCredit();
    }

    /**
     * Gets the SMB dialect revision selected by the server.
     *
     * @return the dialectRevision
     */
    public int getDialectRevision() {
        return this.dialectRevision;

        assertTrue(resp instanceof ServerMessageBlock2Response);
        assertTrue(resp instanceof SmbNegotiationResponse);
    }

    @Test
    @DisplayName("Should return initial credits from getCredit")
    void testGetInitialCredits() throws Exception {
        // Given - set credit using reflection
        Field creditField = ServerMessageBlock2.class.getDeclaredField("credit");
        creditField.setAccessible(true);