// Write nothing
        }

        // Create a new CharMappingFile instance to ensure clean state
        CharMappingFile emptyMappingFile = new CharMappingFile("empty_test", testFile.getAbsolutePath(), new Date());
        emptyMappingFile.manager(dictionaryManager);

        PagingList<CharMappingItem> result = emptyMappingFile.selectList(0, 10);

        testData.add(createRelatedContent("emptytest", "Empty Term Content", ""));
        mockBhv.setTestData(testData);

        relatedContentHelper.load();

        String[] results = relatedContentHelper.getRelatedContents("");
        assertEquals(0, results.length);

        // Test with the actual term
        results = relatedContentHelper.getRelatedContents("emptytest");
        assertEquals(1, results.length);

        // Test empty text
        String emptyText = "";
        String emptyId = SuggestUtil.createSuggestTextId(emptyText);
        assertNotNull(emptyId);
        assertEquals(Base64.getEncoder().encodeToString(emptyText.getBytes(CoreLibConstants.CHARSET_UTF_8)), emptyId);

        // Test special characters
        String specialText = "テスト@#$%^&*()";