}

    @Test
    public void test_empty() {
        // Test empty user bean creation
        FessUserBean emptyBean = FessUserBean.empty();
        assertNotNull(emptyBean);

        // Test getUserId returns EMPTY_USER_ID
        assertEquals(Constants.EMPTY_USER_ID, emptyBean.getUserId());

        // Test hasRoles always returns true for empty user
        assertTrue(emptyBean.hasRoles(new String[] { "admin" }));

  public void testConcat() {
    assertThat(Floats.concat()).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);
    assertThat(Floats.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Floats.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Floats.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);

  }

  public void testConcat() {
    assertThat(Ints.concat()).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);
    assertThat(Ints.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Ints.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Ints.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Ints.concat(ARRAY1, ARRAY1, ARRAY1))

  public void testConcat() {
    assertThat(Floats.concat()).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);
    assertThat(Floats.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Floats.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Floats.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);

     *
     * @return an {@link Optional} containing the list of goals, or empty if not specified
     */
    @Nonnull
    Optional<List<String>> goals();

    /**
     * Returns the target POM model version for upgrades.
     * Supported values include "4.0.0" and "4.1.0".
     *
     * @return an {@link Optional} containing the model version, or empty if not specified
     */
    @Nonnull
    Optional<String> modelVersion();

   */
  @Nullable Range<C> rangeContaining(C value);

  /**
   * Returns {@code true} if there exists a non-empty range enclosed by both a member range in this
   * range set and the specified range. This is equivalent to calling {@code
   * subRangeSet(otherRange)} and testing whether the resulting range set is non-empty.
   *
   * @since 20.0
   */
  boolean intersects(Range<C> otherRange);

  /**

            processor.init();

            // Should handle empty searcher list gracefully
            final List<Map<String, Object>> results = processor.search("*", new TestSearchRequestParams(0, 10, 0), OptionalThing.empty());
            assertNotNull(results);
        }
    }

    /**
     * Test setSearcher when list is initially empty.
     */
    @Test

        assertEquals(0, blob.get().length, "Internal array should be empty");
        assertEquals(0, blob.length(), "length() should be 0 for empty");
        assertEquals("", blob.toString(), "toString() of empty should be empty string");
        assertTrue(blob.equals(blob), "Object should be equal to itself");

		// Test listing an empty directory in recursive mode (62)
		{"test-bucket-empty-dir", "", "", "", 10, resultCases[31], nil, true},
		// Test listing an empty directory in a non recursive mode (63)
		{"test-bucket-empty-dir", "", "", SlashSeparator, 10, resultCases[32], nil, true},
		// Test listing a directory which contains an empty directory (64)

        // Assert deleteByQuery was called with the configured empty index
        assertTrue(deleteByQueryCalled);
        assertEquals("", deleteIndex);

        // Assert result is empty when successful
        assertEquals("", result);
    }

    @Test
    public void test_execute_withEmptyFieldName() {
        // Configure empty field name
        expiresFieldName = "";