assertEquals("Short response", result);
    }

    @Test
    public void test_buildAssistantHistoryContent_smartSummary_noSources() {
        final ChatMessage msg = ChatMessage.assistantMessage("A".repeat(1000));
        final String result = chatClient.testBuildAssistantHistoryContent(msg, "smart_summary", 500, 500);

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String assistantContentMode = fessConfig.getOrDefault("rag.chat.history.assistant.content", "smart_summary");

        final LlmClient client = llmClientManager.getClient();
        final int assistantMaxChars = client != null ? client.getHistoryAssistantMaxChars() : 800;

# Highlight settings for RAG search.
rag.chat.highlight.fragment.size=500
rag.chat.highlight.number.of.fragments=3
# History content mode for assistant messages (full, smart_summary, source_titles, source_titles_and_urls, truncated, none).
rag.chat.history.assistant.content=smart_summary

# Index Export
index.export.path=/var/lib/fess/export
index.export.exclude.fields=cache
index.export.scroll.size=100
index.export.format=html

    Integer getRagChatHighlightNumberOfFragmentsAsInteger();

    /**
     * Get the value for the key 'rag.chat.history.assistant.content'. <br>
     * The value is, e.g. smart_summary <br>
     * comment: History content mode for assistant messages (full, smart_summary, source_titles, source_titles_and_urls, truncated, none).
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */