assertTrue("Should have line4", thread.contains("line4"));
        assertTrue("Should have line5", thread.contains("line5"));
    }

    @Test
    public void test_emptyInputStream() throws IOException, InterruptedException {
        Process mockProcess = createMockProcess("");
        JobProcess jobProcess = new JobProcess(mockProcess);

        InputStreamThread thread = jobProcess.getInputStreamThread();

        String[] inputs = { "input" };
        CharMappingItem item = new CharMappingItem(1L, inputs, "output");

        // Test newline replacement in setNewOutput
        item.setNewOutput("line1\nline2\nline3");
        assertEquals("line1 line2 line3", item.getNewOutput());
    }

    @Test
    public void test_setNewOutput_withNull() {
        String[] inputs = { "input" };

            // Verify content structure
            boolean hasThreadLine = lines.stream().anyMatch(line -> line.startsWith("Thread:"));
            boolean hasStackTraceLine = lines.stream().anyMatch(line -> line.startsWith("\tat "));

            assertTrue("Should contain thread information", hasThreadLine);
            assertTrue("Should contain stack trace information", hasStackTraceLine);

    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    height: 100%;
    background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0052cc 0%, #2684ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;

        assertEquals("return 1 + 2", activityHelper.normalizeScript("return 1 + 2"));
    }

    @Test
    public void test_normalizeScript_withControlCharacters() {
        assertEquals("line1 line2 line3", activityHelper.normalizeScript("line1\nline2\rline3"));
        assertEquals("tab1_tab2", activityHelper.normalizeScript("tab1\ttab2"));
        // \t -> _, \n -> space, \r -> space, \n -> space

        assertEquals(1, result.size());
        assertEquals("f", result.get(0).getOutput());
    }

    // Test reload with comments and empty lines
    @Test
    public void test_reload_withCommentsAndEmptyLines() throws Exception {
        writeTestFile("# This is a comment\n\na,b => c\n\n# Another comment\nd,e => f\n");

        stopwordsFile.reload(null, is);

        assertEquals(2, stopwordsFile.stopwordsItemList.size());
        // The content creates two lines: "word\n1" and "word\"
        assertTrue(stopwordsFile.stopwordsItemList.stream().anyMatch(item -> item.getInput().contains("word")));
    }

    // Test StopwordsUpdater inner class
    @Test

        }
        return hash;
    }

    /**
     * Appends line numbers to each line of content with a given prefix.
     * Useful for debugging and displaying content with line references.
     *
     * @param prefix the prefix to add before each line number
     * @param content the content to add line numbers to
     * @return the content with line numbers prepended, or empty string if content is blank
     */

import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.monitor.os.OsProbe;
import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * This class is a command-line application for creating and managing the suggest index.
 * It provides functionality to index words from documents and search logs, as well as
 * to purge old suggest data.
 */
public class SuggestCreator {

    /**

import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * Executable class for generating thumbnails for indexed documents.
 * This class provides a command-line interface for thumbnail generation tasks.
 */
public class ThumbnailGenerator {

    private static final Logger logger = LogManager.getLogger(ThumbnailGenerator.class);

    /**