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) {