}

    @Test
    public void test_sizeOf_nullObject() {
        assertEquals(0L, MemoryUtil.sizeOf(null));
    }

    @Test
    public void test_sizeOf_stringVariations() {
        // Empty string
        assertEquals(56L, MemoryUtil.sizeOf(""));

        // Single character
        assertEquals(57L, MemoryUtil.sizeOf("a"));

        // Unicode characters