return 2.5f;
            }
        };
        indexUpdater.addDocBoostMatcher(matcher);

        indexUpdater.updateDocument(doc);

        assertEquals(2.5f, doc.get("boost"));
        assertNotNull(doc.get("doc_id"));
    }

    // Test updateDocument without boost
    @Test
    public void test_updateDocument_withoutBoost() {
        final Map<String, Object> doc = new HashMap<>();

            return matchedLabels;
        }
    }

    private static class TestLanguageHelper extends LanguageHelper {
        @Override
        public void updateDocument(Map<String, Object> dataMap) {
            // Do nothing
        }
    }

    private static class TestSearchEngineClient extends SearchEngineClient {
        // Empty implementation for testing
    }

        Map<String, Object> doc = new HashMap<>();
        doc.put("lang", "ja");
        doc.put("title", "タイトル");
        doc.put("content", "コンテンツ");

        languageHelper.updateDocument(doc);

        assertEquals("ja", doc.get("lang"));
        assertEquals("タイトル", doc.get("title_ja"));
        assertEquals("コンテンツ", doc.get("content_ja"));
    }

    @Test

        ComponentUtil.register(client, "searchEngineClient");

        final String id = "001";
        final String field = "content";
        final String value = "test";

        assertTrue(indexingHelper.updateDocument(client, id, field, value));
        assertEquals("fess.update", resultMap.get("index"));
        assertEquals(id, resultMap.get("id"));
        assertEquals(field, resultMap.get("field"));