assertEquals(expectedErrorCode, actualErrorCode);
        verify(response).getErrorCode();
    }

    @Test
    @DisplayName("Test Response interface methods - verifySignature")
    void testVerifySignature() {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;
        int size = 100;
        when(response.verifySignature(buffer, offset, size)).thenReturn(true);

        // When