assertFalse(loopback.isUsableForChannel());
    }

    @Test
    void testGetScore() {
        NetworkInterfaceInfo basic = new NetworkInterfaceInfo(testAddress, 1000);
        assertEquals(1000, basic.getScore()); // Base score is link speed

        NetworkInterfaceInfo fast = new NetworkInterfaceInfo(testAddress, 10000);

        JavadocLexer lexer = new HtmlToXmlJavadocLexer(new BasicJavadocLexer(new JavadocScanner(rawCommentText)));
        DocBookBuilder nodes = new DocBookBuilder(document);
        final HtmlGeneratingTokenHandler handler = new HtmlGeneratingTokenHandler(nodes, document);
        handler.add(new HtmlElementTranslatingHandler(nodes, document));
        handler.add(new PreElementHandler(nodes, document));

    ContainsMultiset containsMultiset = new ContainsMultiset(multiset);
    multiset.add(containsMultiset);
    ContainsBothWithMultisetFirst multisetFirst =
        new ContainsBothWithMultisetFirst(multiset, containsMultiset);
    ContainsBothWithContainsMultisetFirst containsMultisetFirst =
        new ContainsBothWithContainsMultisetFirst(containsMultiset, multiset);

  private final Ordering<Number> numberOrdering = new NumberOrdering();

  public void testAllEqual() {
    Ordering<@Nullable Object> comparator = Ordering.allEqual();
    assertThat(comparator.reverse()).isSameInstanceAs(comparator);

    assertEquals(0, comparator.compare(null, null));
    assertEquals(0, comparator.compare(new Object(), new Object()));
    assertEquals(0, comparator.compare("apples", "oranges"));

  private final Ordering<Number> numberOrdering = new NumberOrdering();

  public void testAllEqual() {
    Ordering<@Nullable Object> comparator = Ordering.allEqual();
    assertThat(comparator.reverse()).isSameInstanceAs(comparator);

    assertEquals(0, comparator.compare(null, null));
    assertEquals(0, comparator.compare(new Object(), new Object()));
    assertEquals(0, comparator.compare("apples", "oranges"));

        void testToStringWithNestedExceptions() {
            Exception innermost = new IOException("Innermost exception");
            Exception middle = new RuntimeException("Middle exception", innermost);
            Exception rootCause = new IllegalStateException("Outer exception", middle);
            TransportException exception = new TransportException("Transport failed", rootCause);

            String result = exception.toString();

    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          boolean haveBeenCalled;

          @Override
          public Integer computeNext() {
            if (haveBeenCalled) {
              throw new AssertionError("Should not have been called again");
            } else {
              haveBeenCalled = true;
              throw sneakyThrow(new SomeCheckedException());
            }

    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          boolean haveBeenCalled;

          @Override
          public Integer computeNext() {
            if (haveBeenCalled) {
              throw new AssertionError("Should not have been called again");
            } else {
              haveBeenCalled = true;
              throw sneakyThrow(new SomeCheckedException());
            }

    /**
     * Tests the append method of the DfsReferral class.
     * It verifies that a new DfsReferral object can be successfully appended to an existing one,
     * forming a linked list structure.
     */
    @Test
    void testAppend() {
        // Given
        DfsReferral initialReferral = new DfsReferral();
        DfsReferral appendedReferral = new DfsReferral();

        // When
        initialReferral.append(appendedReferral);

            model = new MavenStaxReader().read(is);
        }
    }

    @Test
    void testV4Model() {
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(model));
    }

    @Test
    void testV4ModelVersion() {
        Model m = model.withModelVersion("4.1.0");
        assertEquals("4.0.0", new MavenModelVersion().getModelVersion(m));
    }

    @Test