assertEquals(132L, MemoryUtil.sizeOf(Maps.map("1234567890", "1234567890").$()));
    }

    @Test
    public void test_getMemoryUsageLog() {
        String log = MemoryUtil.getMemoryUsageLog();

        assertNotNull(log);
        assertTrue(log.startsWith("Mem:{used "));
        assertTrue(log.contains(", heap "));