@CollectionFeature.Require(SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedPresent() {
    assertFalse("add(present) should return false", getSet().add(e0()));
    expectUnchanged();
  }

  @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedNullPresent() {

        // Assert
        assertEquals("smb", url.getProtocol());
        assertEquals(SmbConstants.DEFAULT_PORT, url.getPort(), "Default port applied for root smb URL");
        assertNull(url.getRef(), "Ref should remain null for root URL");
    }

    @Test
    @DisplayName("parseURL: fragment is moved into path and ref cleared")
    void testParseURL_FragmentMovedToPath() throws MalformedURLException {

      expectedHashCode += (element == null) ? 0 : element.hashCode();
    }
    assertEquals(
        "A Set's hashCode() should be the sum of those of its elements.",
        expectedHashCode,
        getSet().hashCode());
  }

  @CollectionSize.Require(absent = CollectionSize.ZERO)
  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  public void testHashCode_containingNull() {

                Arguments.of(-1, -2L, -3L, -4L, -5L) // negative values
        );
    }

    // --- Mockito interaction: verify each getter is invoked and returns stubbed values ---
    @Test
    void mockitoMock_verifiesGetterInteractions() {
        // Arrange: mock and stub each getter with distinct values
        SmbBasicFileInfo mock = Mockito.mock(SmbBasicFileInfo.class);
        Mockito.when(mock.getAttributes()).thenReturn(7);

     *
     * @param key
     *            7 or 8 byte DES key
     * @return DES cipher in encryption mode
     */
    public static Cipher getDES(final byte[] key) {
        if (key.length == 7) {
            return getDES(des7to8(key));
        }

        try {
            final Cipher c = Cipher.getInstance("DES/ECB/NoPadding");

        return project.getExtensions().getByType(JavaPluginExtension.class) == null;
    }


    public static Object toStringable(Supplier<String> getter) {
        return new Object() {
            @Override
            public String toString() {
                return getter.get();
            }
        };
    }

    public static SourceSetContainer getJavaSourceSets(Project project) {

        /**
         * @return Object
         */
        public Object isDdd() {
            return null;
        }

        /**
         * @return String
         */
        public String getEee() {
            return null;
        }

        /**
         * @param eee
         *            eee
         */
        public void setEee(final String eee) {
        }
    }

  private List<E> values;
  private E a;
  private E b;
  private E c;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    navigableSet = (NavigableSet<E>) getSet();
    values =
        copyToList(
            getSubjectGenerator()
                .getSampleElements(getSubjectGenerator().getCollectionSize().getNumElements()));
    sort(values, navigableSet.comparator());

   * collection in setUp(), but that caused problems when a tester changed the
   * value of set or collection but not both.
   */
  protected final Set<E> getSet() {
    return (Set<E>) collection;
  }

   * collection in setUp(), but that caused problems when a tester changed the
   * value of set or collection but not both.
   */
  protected final Set<E> getSet() {
    return (Set<E>) collection;
  }