* @param url The URL.
     * @return The host on file.
     */
    protected String getHostOnFile(final String url) {
        if (StringUtil.isBlank(url)) {
            return StringUtil.EMPTY; // empty
        }

        if (url.startsWith("file:////")) {
            final String value = decodeUrlAsName(url.substring(9), true);
            final int pos = value.indexOf('/');
            if (pos > 0) {

          .put(Locale.class, Locale.US)
          .put(Optional.class, Optional.empty())
          .put(OptionalInt.class, OptionalInt.empty())
          .put(OptionalLong.class, OptionalLong.empty())
          .put(OptionalDouble.class, OptionalDouble.empty())
          .put(UUID.class, UUID.randomUUID())
          // common.base
          .put(CharMatcher.class, CharMatcher.none())

     */
    public OptionalEntity<CharMappingFile> getCharMappingFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(CharMappingFile.class::isInstance)
                .map(file -> OptionalEntity.of((CharMappingFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

    }

    /**
     * Test contains method with empty list
     */
    @Test
    @DisplayName("Contains should return false for empty list")
    void testContainsEmptyList() {
        List<AvPair> emptyList = new ArrayList<>();
        assertFalse(AvPairs.contains(emptyList, AvPair.MsvAvFlags), "Should return false for empty list");
    }

    /**
     * Test contains method with existing type

        assertNotNull(e.getOptions(), "Options map should not be null");
        assertTrue(e.getOptions().isEmpty(), "Default options should be empty");
    }

    @ParameterizedTest
    @NullSource
    @ValueSource(strings = { "", "svc/******@****.***" })
    @DisplayName("Name parameter is ignored (null/empty/arbitrary)")
    void nameParameter_isIgnoredAndDoesNotAffectResult(String name) {
        // Arrange

    /**
     * An empty string <code>""</code>.
     */
    public static final String EMPTY = "";

    /**
     * An empty array of strings.
     */
    public static final String[] EMPTY_STRINGS = new String[0];


    /**
     * Checks if the string is empty or null.
     *
     * @param text the string to check
     * @return true if empty or null, false otherwise
     */

    }

    /**
     * Test extraction with empty input stream.
     */
    public void test_getText_emptyInputStream_returnsEmptyContent() {
        final InputStream in = new ByteArrayInputStream(new byte[0]);

        final ExtractData result = textExtractor.getText(in, null);

        assertNotNull(result);
        assertNotNull(result.getContent());

   * in the same order. If the value orderings disagree, the multimaps will not be considered equal.
   *
   * <p>An empty {@code ListMultimap} is equal to any other empty {@code Multimap}, including an
   * empty {@code SetMultimap}.
   */
  @Override
  boolean equals(@Nullable Object obj);

   * in the same order. If the value orderings disagree, the multimaps will not be considered equal.
   *
   * <p>An empty {@code ListMultimap} is equal to any other empty {@code Multimap}, including an
   * empty {@code SetMultimap}.
   */
  @Override
  boolean equals(@Nullable Object obj);

        assertTrue(ex.getMessage().toLowerCase().contains("null"));
    }

    @Test
    @DisplayName("toByteArray returns empty when no mechanismToken")
    void toByteArrayWhenNull() {
        TestSpnegoToken t = new TestSpnegoToken();
        assertArrayEquals(new byte[0], t.toByteArray(), "empty array expected when mechanismToken is null");
    }

    @Test