assertTrue(result.contains("path=" + testFile.getAbsolutePath()));
        assertTrue(result.contains("id=test_id"));
    }

    // Test get method with empty file
    public void test_get_emptyFile() throws Exception {
        writeTestFile("");

        OptionalEntity<CharMappingItem> result = charMappingFile.get(1L);
        assertFalse(result.isPresent());
    }