CrawlerSystemException exception = new CrawlerSystemException("Print stack trace test");

        StringWriter stringWriter = new StringWriter();
        PrintWriter printWriter = new PrintWriter(stringWriter);
        exception.printStackTrace(printWriter);

        String stackTraceOutput = stringWriter.toString();
        assertNotNull(stackTraceOutput);
        assertTrue(stackTraceOutput.contains("CrawlerSystemException"));

    private StringWriter stringWriter;
    private PrintWriter printWriter;
    private ByteArrayOutputStream outputStream;
    private ServletOutputStream servletOutputStream;

    @BeforeEach
    void setUp() throws Exception {
        // Setup response writers
        stringWriter = new StringWriter();
        printWriter = new PrintWriter(stringWriter);
        outputStream = new ByteArrayOutputStream();

        }
        return Optional.empty();
    }

    @Override
    public void warnAboutDeprecatedOptions(ParserRequest request, Consumer<String> printWriter) {
        if (cliManager.getUsedDeprecatedOptions().isEmpty()) {
            return;
        }
        printWriter.accept("Detected deprecated option use in " + source);
        for (Option option : cliManager.getUsedDeprecatedOptions()) {

        assertEquals("test", o2);
    }

    @Test
    public void testLoadSave() throws IOException {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        pw.println("# ");
        pw.println("# The Main  ");
        pw.println("# ");
        pw.println("# Comment ");
        pw.println("# ");
        pw.println("");

        });

        reportErrors(errors, getReportFile().get().getAsFile());
    }

    private void reportErrors(Map<File, List<Error>> errors, File reportFile) {
        try (PrintWriter fw = new PrintWriter(new FileWriter(reportFile))) {
            writeHeader(fw);
            if (errors.isEmpty()) {
                fw.println("All clear!");
                return;
            }

  public void testLineReading() throws IOException {
    File temp = createTempFile();
    assertThat(Files.readFirstLine(temp, UTF_8)).isNull();
    assertTrue(Files.readLines(temp, UTF_8).isEmpty());

    PrintWriter w = new PrintWriter(Files.newWriter(temp, UTF_8));
    w.println("hello");
    w.println("");
    w.println(" world  ");
    w.println("");
    w.close();

    assertEquals("hello", Files.readFirstLine(temp, UTF_8));

            Path logFile = context.cwd.resolve(context.options().logFile().get());
            try {
                PrintWriter printWriter = new PrintWriter(Files.newBufferedWriter(logFile), true);
                context.closeables.add(printWriter);
                return printWriter::println;
            } catch (IOException e) {
                throw new MavenException("Unable to redirect logging to " + logFile, e);

  public void testLineReading() throws IOException {
    File temp = createTempFile();
    assertThat(Files.readFirstLine(temp, UTF_8)).isNull();
    assertTrue(Files.readLines(temp, UTF_8).isEmpty());

    PrintWriter w = new PrintWriter(Files.newWriter(temp, UTF_8));
    w.println("hello");
    w.println("");
    w.println(" world  ");
    w.println("");
    w.close();

    assertEquals("hello", Files.readFirstLine(temp, UTF_8));

    public Set<Option> getUsedDeprecatedOptions() {
        return usedDeprecatedOptions;
    }

    public void displayHelp(PrintStream stdout) {
        displayHelp(new PrintWriter(stdout));
    }

    public void displayHelp(PrintWriter pw) {
        HelpFormatter formatter = new HelpFormatter();

        int width = MessageUtils.getTerminalWidth();
        if (width <= 0) {

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Serializable;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Array;