assertEquals(2, buffer[4]); // AES128_GCM (little endian)
            assertEquals(0, buffer[5]);
        }

        @Test
        @DisplayName("Should encode with null ciphers")
        void testEncodeWithNullCiphers() {
            // Arrange
            context = new EncryptionNegotiateContext(mockConfig, null);
            byte[] buffer = new byte[100];

            // Act