assertNull(actualFileId);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    @DisplayName("Test buffer size edge cases")
    void testBufferSizeEdgeCases() {
        // Test with very small buffer sizes
        when(mockConfig.getMaximumBufferSize()).thenReturn(256);
        when(mockConfig.getListSize()).thenReturn(128);

        assertTrue(negotiationResponse.isSigningRequired());
        assertTrue(negotiationResponse.isSigningNegotiated());
    }

    @Test
    @DisplayName("Test buffer size edge cases")
    void testBufferSizeEdgeCases() {
        // Test minimum buffer sizes
        when(negotiationResponse.getSendBufferSize()).thenReturn(1);
        when(negotiationResponse.getReceiveBufferSize()).thenReturn(1);