Map<String, List<String>> headers = new HashMap<>();
        headers.put(null, Arrays.asList("value"));
        headers.put("Content-Type", Arrays.asList("application/json"));

        response.setHeaders(headers);

        Map<String, List<String>> result = response.getHeaders();
        assertNotNull(result);
        assertEquals(1, result.size()); // null key should be filtered out
        assertTrue(result.containsKey("content-type"));

    @Test
    void testLsarDomainInfoEncodeDecodeWithNulls() throws NdrException {
        // Create a domain info with null fields
        lsarpc.LsarDomainInfo domainInfo = new lsarpc.LsarDomainInfo();
        domainInfo.name = new rpc.unicode_string();
        domainInfo.name.buffer = null;
        domainInfo.sid = null;

        // Encode to buffer
        byte[] buffer = new byte[1024];

        existNextPage = false;
        pageSize = getDefaultPageSize();
        currentPageNumber = getDefaultCurrentPageNumber();

        queryId = null;
        userSessionId = null;
        requestedTimeRange = null;
        accessType = null;
        logType = LOG_TYPE_SEARCH;

    }

    /**
     * Gets the default current page number.
     *
     * @return The default current page number

    doTestToArrayImpl2(Lists.<@Nullable Integer>newArrayList(1, null, 3), new Integer[0], false);
    doTestToArrayImpl2(Lists.<@Nullable Integer>newArrayList(1, null, 3), new Integer[2], false);
    doTestToArrayImpl2(Lists.<@Nullable Integer>newArrayList(1, null, 3), new Integer[3], true);
  }

  private void doTestToArrayImpl2(List<Integer> list, Integer[] array1, boolean expectModify) {

   * forward to this implementation.
   */
  protected @Nullable Entry<E> standardFirstEntry() {
    Iterator<Entry<E>> entryIterator = entrySet().iterator();
    if (!entryIterator.hasNext()) {
      return null;
    }
    Entry<E> entry = entryIterator.next();
    return Multisets.immutableEntry(entry.getElement(), entry.getCount());
  }

  @Override
  public @Nullable Entry<E> lastEntry() {

@ExtendWith(MockitoExtension.class)
class SmbTreeConnectionTraceTest {

    // Helper to build a minimal smb URL
    private static URL smbUrl(String spec) {
        try {
            return new URL(null, spec, new Handler());
        } catch (MalformedURLException e) {
            throw new AssertionError("Failed to create SMB URL: " + spec, e);
        }
    }

    // Utility to build a minimal locator for connect tests

            assertEquals(null, new SmbFile("smb1://server/").getShare());
        }

        @Test
        public void testGetServer() throws MalformedURLException {
            assertEquals("server", new SmbFile("smb1://server/share/file.txt").getServer());
            assertEquals("server", new SmbFile("smb1://server/").getServer());
            assertEquals(null, new SmbFile("smb1://").getServer());
        }

     * The id uniquely identifies this <i>dependency type</i>.
     *
     * @return the id of this type, never {@code null}.
     */
    @Nonnull
    @Override
    String id();

    /**
     * Returns the dependency type language.
     *
     * @return the language of this type, never {@code null}.
     */
    @Nonnull
    Language getLanguage();

    /**

    }

    // Test convertBooleanQuery with null queryBuilder from processor
    public void test_convertBooleanQuery_withNullQueryBuilder() {
        // Create processor that returns null
        QueryProcessor nullProcessor = new QueryProcessor() {
            @Override
            public QueryBuilder execute(QueryContext context, Query query, float boost) {
                return null;
            }
        };

              new byte[] {(byte) 0xdf, (byte) 0x9b, (byte) 0x57, (byte) 0x13},
              0x13579bdf,
              null,
              "df9b5713"),
          new ExpectedHashCode(
              new byte[] {(byte) 0xcd, (byte) 0xab, (byte) 0x00, (byte) 0x00},
              0x0000abcd,
              null,
              "cdab0000"),
          new ExpectedHashCode(
              new byte[] {