}, "Should throw NullPointerException with default constructor values");
        }

        @Test
        @DisplayName("encode_in should write basic buffer operations")
        void testEncodeInBasicOperations() throws Exception {
            // Given
            int maxXmit = 1024;
            int maxRecv = 2048;
            when(mockHandle.getMaxXmit()).thenReturn(maxXmit);