* @throws NullPointerException if {@code string} is null
   */
  @Override
  public String escape(String string) {
    checkNotNull(string); // GWT specific check (do not optimize)
    // Inlineable fast-path loop which hands off to escapeSlow() only if needed
    int length = string.length();
    for (int index = 0; index < length; index++) {
      if (escape(string.charAt(index)) != null) {
        return escapeSlow(string, index);
      }

    }

    /**
     * Checks if the request header is valid.
     * A header is considered valid if its name is not blank and its value is not null.
     * @return true if the header is valid, false otherwise.
     */
    public boolean isValid() {
        if (StringUtil.isBlank(name) || value == null) {
            return false;
        }

        return true;
    }

     * @param challenge the server challenge (may be null for some auth types)
     * @return authentication response data
     * @throws CIFSException if authentication fails
     */
    byte[] authenticate(CIFSContext context, byte[] challenge) throws CIFSException;

    /**
     * Gets the session key after successful authentication
     *
     * @return the session key or null if not available
     */
    byte[] getSessionKey();

        CurlException exception = new CurlException(null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void testConstructorWithNullMessageAndCause() {
        IOException cause = new IOException("IO error");
        CurlException exception = new CurlException(null, cause);

        assertNull(exception.getMessage());

     * cache.
     *
     * @param project The project that employs the plugin realm, must not be {@code null}.
     * @param record The cache record being used for the project, must not be {@code null}.
     */
    void register(MavenProject project, Key key, CacheRecord record);

    ParameterizedType parameterizedType = Types.newParameterizedType(Map.class, typesIn);
    typesIn[0] = null;
    typesIn[1] = null;

    Type[] typesOut = parameterizedType.getActualTypeArguments();
    typesOut[0] = null;
    typesOut[1] = null;

    assertEquals(String.class, parameterizedType.getActualTypeArguments()[0]);

        assertEquals("user", sid.getAccountName());

        SID domainSid = new SID(rpcSid, SID.SID_TYPE_DOMAIN, "DOMAIN", null, false);
        assertEquals("", domainSid.getAccountName());

        SID unknownSid = new SID(rpcSid, SID.SID_TYPE_UNKNOWN, null, null, false);
        unknownSid.sub_authority_count = 1;
        unknownSid.sub_authority = new int[] { 123 };

                }
            }
            return null;
        }).when(tree).send(any(Request.class));

        // Act: create iterator and enumerate
        DirFileEntryEnumIterator2 it = new DirFileEntryEnumIterator2(tree, parent, wildcard, (ResourceNameFilter) null, 0);

        // Assert: first page
        assertTrue(it.hasNext(), "Iterator should have first element");

    }
    return false;  // Fall back to oplock logic
}

public boolean canCacheWrite() {
    if (leaseKey != null) {
        LeaseEntry entry = leaseManager.getLease(leaseKey);
        return entry != null && entry.hasWriteCache();
    }
    return false;
}

public boolean canCacheHandle() {
    if (leaseKey != null) {

            zipExtractor.setMaxContentSize(100);
            zipExtractor.getText(in, null);
            fail();
        } catch (MaxLengthExceededException e) {
            // pass
        }
        zipExtractor.setMaxContentSize(-1);
    }

    public void test_getText_null() {
        try {
            zipExtractor.getText(null, null);
            fail();
        } catch (final CrawlerSystemException e) {