// Test text that exceeds maximum length after encoding
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 500; i++) {
            sb.append("0123456789");
        }
        String longText = sb.toString();
        String id = SuggestUtil.createSuggestTextId(longText);
        assertNotNull(id);

                testEncryptionKey, testDecryptionKey);

        // When/Then
        assertThrows(IllegalArgumentException.class, () -> context.encryptMessage(null, 123456L),
                "Should throw IllegalArgumentException for null message");
    }

    @Test
    @DisplayName("Should successfully encrypt and decrypt with refactored methods")

            byte[] buffer = new byte[10];
            int bytesRead = in.read(buffer);
            assertEquals(10, bytesRead, "Should read requested bytes");
            assertEquals("0123456789", new String(buffer, 0, bytesRead, "UTF-8"));

            // Read next chunk
            bytesRead = in.read(buffer);
            assertEquals(10, bytesRead, "Should read next chunk");

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