assertEquals("p", outputs2[0]);
        assertEquals("q", outputs2[1]);
        assertEquals("r", outputs2[2]);
    }

    @Test
    public void test_defensiveCopy_nullArrays() {
        // Test that defensive copy handles null arrays correctly
        SynonymItem item1 = new SynonymItem(1, new String[] { "a" }, new String[] { "x" });

        // Set to null