mvn test                       # Run tests
mvn formatter:format           # Format code
mvn license:format             # Update license headers
```

### Code Style

- 4 spaces (no tabs), opening brace on same line, max line length 120
- JavaDoc required for public APIs
- License headers required (Apache 2.0)

### Testing

- **Structure**: `src/test/java/org/codelibs/fess/crawler/`

      ArrayListMultimap<K, V> create(int expectedKeys, int expectedValuesPerKey) {
    return new ArrayListMultimap<>(expectedKeys, expectedValuesPerKey);
  }

  /**
   * Constructs an {@code ArrayListMultimap} with the same mappings as the specified multimap.
   *
   * <p>You may also consider the equivalent {@code
   * MultimapBuilder.hashKeys().arrayListValues().build(multimap)}, which provides more control over

        }
    }

    @Nested
    @DisplayName("Edge cases and special scenarios")
    class EdgeCases {

        @Test
        @DisplayName("Should handle multiple extensions for same mime type")
        void testMultipleExtensionsForSameMimeType() throws IOException {
            // Both jpg and jpeg should map to image/jpeg
            String jpgMime = mimeMap.getMimeType("jpg");

        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<ScheduledJob> selectPage(CBCall<ScheduledJobCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<ScheduledJob>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<ScheduledJobCB> cbLambda, EntityRowHandler<ScheduledJob> entityLambda) {

    return new ElementOrder<>(Type.UNORDERED, null);
  }

  /**
   * Returns an instance which specifies that ordering is guaranteed to be always be the same across
   * iterations, and across releases. Some methods may have stronger guarantees.
   *
   * <p>This instance is only useful in combination with {@code incidentEdgeOrder}, e.g. {@code
   * graphBuilder.incidentEdgeOrder(ElementOrder.stable())}.

    waiter.join();
    future.set(null);
    poller.join();
  }

  public void testToString_allUnique() throws Exception {
    // Two futures should not have the same toString, to avoid people asserting on it
    assertThat(SettableFuture.create().toString()).isNotEqualTo(SettableFuture.create().toString());
  }

  public void testToString_oom() throws Exception {

    /**
     * Retrieves a data configuration by its name.
     *
     * <p>If multiple configurations exist with the same name, returns the first one
     * ordered by sort order ascending.</p>
     *
     * @param name the name of the data configuration to retrieve
     * @return an OptionalEntity containing the DataConfig if found, empty otherwise
     * @throws IllegalArgumentException if name is null or empty
     */

        // Both instances should be of the same class
        assertEquals(exception1.getClass(), exception2.getClass());
    }

    @Test
    public void test_componentNameWithSpecialCharacters() {
        // Test component name with special characters
        String componentName = "my-component_v2.0@service";

        // Verify - should return empty when parameter name is blank
        assertFalse(result.isPresent());
    }

    // Test findBusinessLocale with null parameter name
    @Test
    public void test_findBusinessLocale_withNullParameterName() {
        // Setup mock config with null parameter name
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            @Override

        assertEquals(8, result);
        assertNotNull(response.getResults());
    }

    @Test
    @DisplayName("Test multiple calls to getResults return same instance")
    void testMultipleGetResultsCalls() throws Exception {
        response = new Smb2QueryDirectoryResponse(mockConfig, (byte) 0x03);

        // Use reflection to set the results field