import java.util.Map;
import java.util.Set;

/**
 * Formatter that outputs index documents as HTML files.
 */
public class HtmlIndexExportFormatter implements IndexExportFormatter {

    /**
     * Creates a new HtmlIndexExportFormatter instance.
     */
    public HtmlIndexExportFormatter() {
        // default constructor
    }

    @Override
    public String getFileExtension() {
        return ".html";
    }

        final Path result2 = indexExportJob.buildFilePath("/export", "invalid url 2 %%%", new HtmlIndexExportFormatter());
        assertFalse(result1.equals(result2));
    }

    @Test
    public void test_buildHtml_emptyMap() {
        final String html = new HtmlIndexExportFormatter().format(Collections.emptyMap(), Collections.emptySet());

            throw new IllegalArgumentException("Export format must not be null or empty");
        }
        switch (format.trim().toLowerCase()) {
        case "html":
            return new HtmlIndexExportFormatter();
        case "json":
            return new JsonIndexExportFormatter();
        default:
            throw new IllegalArgumentException("Unsupported export format: " + format);
        }
    }