Date expected4 = new Date();
        doc.put("key4", expected4);
        assertEquals(expected4, DocumentUtil.getValue(doc, "key4", Date.class));
    }

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

        long expected5 = 999999999999999999L;
        doc.put("key5", expected5);

        byte[] buffer = new byte[10];
        // Should throw exception when buffer is too small
        assertThrows(IllegalStateException.class, () -> hmac.engineDigest(buffer, 0, 10));
    }

    @Test
    void testClone() {
        // Test clone() method
        HMACT64 originalHmac = new HMACT64(TEST_KEY);
        originalHmac.engineUpdate(TEST_DATA, 0, TEST_DATA.length / 2);

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

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

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

        try {

            HMACT64 hmac = new HMACT64(TEST_KEY);
            assertThrows(IllegalStateException.class, () -> hmac.engineDigest(new byte[10], 0, 10));
        }
    }

    @Test
    void testClone() throws NoSuchAlgorithmException, CloneNotSupportedException {
        // Test clone() method
        try (MockedStatic<Crypto> mockedCrypto = mockStatic(Crypto.class)) {