verify(mockDigest, never()).verify(any(), anyInt(), anyInt(), anyInt(), any());
        }

        @Test
        @DisplayName("Should skip verification when digest is null")
        void testVerifySignatureNoDigest() {
            byte[] buffer = new byte[100];

            boolean result = response.verifySignature(buffer, 0, 100);

            assertTrue(result);
        }

        @Test

            assertFalse(result);
            assertTrue(echoResponse.isVerifyFailed());
        }

        @Test
        @DisplayName("Should skip verification when digest is null")
        void testVerifySignatureNoDigest() {
            byte[] buffer = new byte[1024];
            echoResponse.setDigest(null);

            boolean result = echoResponse.verifySignature(buffer, 0, 100);

            assertTrue(result);

        void setup() {
            testBlock = new TestServerMessageBlock(mockConfig);
        }

        @Test
        @DisplayName("Test verify signature with no digest")
        void testVerifySignatureNoDigest() {
            byte[] buffer = new byte[100];

            assertTrue(testBlock.verifySignature(buffer, 0, 100));
        }

        @Test