try {
            labelTypeHelper.getMatchedLabelValueSet(null);
            fail("Should handle null path gracefully or throw appropriate exception");
        } catch (Exception e) {
            // Expected behavior for null path
            assertNotNull(e);
        }
    }

    public void test_buildLabelTypeItems() {
        List<LabelType> labelTypeList = createTestLabelTypeList();

        try {

 *
 * <p>The parser supports configuration of default field, analyzer, wildcard settings,
 * and default operator. It also allows adding custom filters to modify query behavior.</p>
 *
 */
public class QueryParser {

    /**
     * Default constructor.
     */
    public QueryParser() {
        // Default constructor
    }

    // TODO(dbeaumont): Support escapers where alphanumeric chars are not safe.
    checkNotNull(safeChars); // eager for GWT.
    // Avoid any misunderstandings about the behavior of this escaper
    if (safeChars.matches(".*[0-9A-Za-z].*")) {
      throw new IllegalArgumentException(
          "Alphanumeric characters are always 'safe' and should not be explicitly specified");
    }

        // Test initial state
        assertTrue(response.hasMoreElements());

        // Test state after nextElement call
        response.nextElement();
        // Response behavior may change after nextElement

        // Test state after error (using errorCode, not status)
        response.setTestErrorCode(1);
        assertFalse(response.hasMoreElements());

        SearchLogEvent event1 = new TestSearchLogEvent("id1", 1L, "type1");
        SearchLogEvent event2 = new NullSearchLogEvent();
        SearchLogEvent event3 = new EmptySearchLogEvent();

        // Test polymorphic behavior
        SearchLogEvent[] events = { event1, event2, event3 };

        for (SearchLogEvent event : events) {
            // All methods should be callable without exceptions
            String id = event.getId();

 * with your desired config. It's base implementation {@link jcifs.context.BaseContext}
 * should be sufficient for most needs.
 *
 * If you want to retain the classic singleton behavior you can use
 * {@link jcifs.context.SingletonContext#getInstance()}
 * witch is initialized using system properties.
 *
 */
public class Config {

    /**

    @DisplayName("EmptyIterator should follow Iterator contract for empty collections")
    void testIteratorContract() {
        // Given - typical Iterator usage pattern

        // When & Then - verify empty collection behavior
        assertFalse(emptyIterator.hasNext(), "Empty iterator should have no next element");

        // Note: Standard Iterator would throw NoSuchElementException, but this implementation returns null

    }
    return endpoints;
  }

  // NOTE: this should work as long as the delegate graph's implementation of edges() (like that of
  // AbstractGraph) derives its behavior from calling successors().
  private static final class TransposedGraph<N> extends ForwardingGraph<N> {
    private final Graph<N> graph;

    TransposedGraph(Graph<N> graph) {
      this.graph = graph;
    }

    }
    return endpoints;
  }

  // NOTE: this should work as long as the delegate graph's implementation of edges() (like that of
  // AbstractGraph) derives its behavior from calling successors().
  private static final class TransposedGraph<N> extends ForwardingGraph<N> {
    private final Graph<N> graph;

    TransposedGraph(Graph<N> graph) {
      this.graph = graph;
    }

 * nearly drop-in replacement. Note that it is not available for Android or GWT/J2CL and that it may
 * have <a href="https://github.com/ben-manes/caffeine/wiki/Guava">different (usually better)
 * behavior</a> when multiple threads attempt concurrent mutations. Its equivalent to {@code
 * CacheBuilder} is its <a