double expected6 = 999.999;
        doc.put("key6", expected6);
        assertEquals(expected6, DocumentUtil.getValue(doc, "key6", Double.class));
    }

    @Test
    public void test_float() {
        Map<String, Object> doc = new HashMap<>();

        float expected7 = 999.999f;
        doc.put("key7", expected7);
        assertEquals(expected7, DocumentUtil.getValue(doc, "key7", Float.class));

        try {
            labelTypeHelper.init();
        } catch (Exception e) {
            fail("init() should not throw an exception: " + e.getMessage());
        }
    }

    @Test
    public void test_load() {
        int result = labelTypeHelper.load();
        assertTrue(result >= 0);
    }

    @Test
    public void test_refresh() {
        List<LabelType> labelTypeList = createTestLabelTypeList();