assertEquals("1", item.getNewInputs()[0]);
        assertEquals("5", item.getNewInputs()[1]);
        assertEquals("9", item.getNewInputs()[2]);
    }

    public void test_sort_withNullArrays() {
        // Test sort with null arrays doesn't throw exception
        CharMappingItem item = new CharMappingItem(1L, new String[] { "a" }, "output");
        item.setNewInputs(null);