final ChatSource source = new ChatSource(1, doc);

        assertEquals(1, source.getIndex());
        assertNull(source.getTitle());
        assertNull(source.getUrl());
        assertNull(source.getDocId());
        assertNull(source.getSnippet());
    }

    @Test
    public void test_chatSourceSetters() {
        final ChatSource source = new ChatSource();

        doc1.put("url", "http://example.com/install");
        msg.addSource(new ChatSource(1, doc1));
        final Map<String, Object> doc2 = new HashMap<>();
        doc2.put("title", "Quick Start");
        doc2.put("url", "http://example.com/start");
        msg.addSource(new ChatSource(2, doc2));

        final String result = chatClient.testBuildAssistantHistoryContent(msg, "source_titles", 500, 500);

     *
     * @return the list of sources
     */
    public List<ChatSource> getSources() {
        return sources;
    }

    /**
     * Sets the list of sources referenced in the message.
     *
     * @param sources the list of sources
     */
    public void setSources(final List<ChatSource> sources) {
        this.sources = sources;
    }

    /**

     * @return the source titles suffix, or empty string
     */
    private String buildSourceTitlesSuffix(final List<ChatSource> sources) {
        return buildSourceTitlesSuffix(sources, Integer.MAX_VALUE);
    }

    private String buildSourceTitlesSuffix(final List<ChatSource> sources, final int maxSuffixLength) {
        if (sources == null || sources.isEmpty()) {
            return "";
        }

        assertFalse(response.containsKey("sources"));
    }

    @Test
    public void test_createSuccessResponse_withSources() {
        final List<ChatSource> sources = new ArrayList<>();
        final ChatSource source1 = new ChatSource();
        source1.setUrl("https://example.com/page1");
        source1.setTitle("Page 1");
        sources.add(source1);

import org.codelibs.fess.Constants;
import org.codelibs.fess.api.BaseApiManager;
import org.codelibs.fess.chat.ChatClient.ChatResult;
import org.codelibs.fess.chat.ChatPhaseCallback;
import org.codelibs.fess.entity.ChatMessage.ChatSource;
import org.codelibs.fess.entity.FacetQueryView;
import org.codelibs.fess.entity.SearchRequestParams;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.llm.LlmException;