*/
  public void add(Runnable runnable, Executor executor) {
    // Fail fast on a null. We throw NPE here because the contract of Executor states that it throws
    // NPE on null listener, so we propagate that contract up into the add method as well.
    checkNotNull(runnable, "Runnable was null.");
    checkNotNull(executor, "Executor was null.");

    // Lock while we check state. We must maintain the lock while adding the new pair so that

      |--123--
      |
      """.trimMargin().replace("\n", "\r\n")
    val body =
      MultipartBody
        .Builder("123")
        .addPart("Quick".toRequestBody(null))
        .addPart("Brown".toRequestBody(null))
        .addPart("Fox".toRequestBody(null))
        .build()
    assertThat(body.boundary).isEqualTo("123")
    assertThat(body.type).isEqualTo(MultipartBody.MIXED)
    assertThat(body.contentType().toString())

        //    } else {
        //        return null;
        //    }
        //}
        //try {
        //    return CDef.DefMeta.valueOf(searchName);
        //} catch (IllegalArgumentException ignored) { // not found
        //    return null; // handled later
        //}
    }

    @Override
    public OptionalThing<String> determineAlias(final Locale locale) {

        if (StringUtil.isBlank(requestPath)) {
            return null;
        }
        final String virtualHostKey = ComponentUtil.getVirtualHostHelper().getVirtualHostKey();
        if (StringUtil.isBlank(virtualHostKey)) {
            return null;
        }
        final String prefix = "/" + virtualHostKey;
        if (requestPath.startsWith(prefix)) {

        // Test with a null source array
        ByteEncodable encodable = new ByteEncodable(null, 0, 0);
        byte[] dest = new byte[1];

        // Expect NullPointerException from System.arraycopy
        assertThrows(NullPointerException.class, () -> {
            encodable.encode(dest, 0);
        }, "Should throw NullPointerException if source array is null");
    }

    @Test

                    fessConfig.getIndexFieldCache());
        }
        if (highlightedFields == null) {
            highlightedFields = fessConfig.getQueryAdditionalHighlightedFields( //
                    fessConfig.getIndexFieldContent());
        }
        if (searchFields == null) {
            searchFields = fessConfig.getQueryAdditionalSearchFields(//
                    INURL_FIELD, //

    void testDefaultConstructor() {
        // Given & When
        CIFSUnsupportedCryptoException exception = new CIFSUnsupportedCryptoException();

        // Then
        assertNull(exception.getMessage(), "Default constructor should have null message");
        assertNull(exception.getCause(), "Default constructor should have null cause");

  }

  /*
   * Our implementation works fine with a null `dir`. However, there's nothing in the documentation
   * of the supertype that suggests that implementations are expected to tolerate null. That said, I
   * see calls in Google code that pass a null `dir` to a FilenameFilter.... So let's declare the
   * parameter as non-nullable (since passing null to a FilenameFilter is unsafe in general), but if

   *
   * @param element the element to add one occurrence of; may be null only if explicitly allowed by
   *     the implementation
   * @return {@code true} always, since this call is required to modify the multiset, unlike other
   *     {@link Collection} types
   * @throws NullPointerException if {@code element} is null and this implementation does not permit
   *     null elements

            assertEquals("ftp://localhost:10021/text2.txt", urlList.get(4));
        } finally {
            if (server != null) {
                server.stop();
            }
        }
    }

    public void test_doGet_dir1() throws FtpException {
        FtpServer server = null;
        try {
            String username = "testuser";
            String password = "testpass";