assertFalse(existingItem.isUpdated());
        assertNull(existingItem.getNewInput());
        assertEquals("existingword", existingItem.toLineString());
    }

    @Test
    public void test_multipleUpdates() {
        // Test multiple updates to newInput
        StopwordsItem item = new StopwordsItem(1, "original");

        item.setNewInput("first");
        assertEquals("first", item.toLineString());

        byte[] originalResult = originalHmac.engineDigest();
        byte[] clonedResult = clonedHmac.engineDigest();

        assertArrayEquals(originalResult, clonedResult);
    }

    @Test
    void testMultipleUpdates() {
        // Test multiple update calls
        HMACT64 hmac1 = new HMACT64(TEST_KEY);
        HMACT64 hmac2 = new HMACT64(TEST_KEY);

        // Update hmac1 all at once