long memory1 = MemoryUtil.getUsedMemory();
        assertTrue(memory1 >= 0);

        // Create some objects to change memory usage
        @SuppressWarnings("unused")
        String[] largeArray = new String[1000];
        for (int i = 0; i < 1000; i++) {
            largeArray[i] = "test" + i;
        }

        long memory2 = MemoryUtil.getUsedMemory();
        assertTrue(memory2 >= 0);

        }
        return displaySize;
    }

    /**
     * Gets the currently used memory in bytes.
     *
     * @return used memory in bytes
     */
    public static long getUsedMemory() {
        final Runtime runtime = Runtime.getRuntime();
        final long freeBytes = runtime.freeMemory();
        final long totalBytes = runtime.totalMemory();
        return totalBytes - freeBytes;
    }

        long margin = 5000000L;
        System.gc();
        for (int i = 0; i < 30; i++) {
            if (MemoryUtil.getUsedMemory() < current + margin) {
                break;
            }
            System.gc();
            Thread.sleep(1000L);
        }
        final long usedMemory = MemoryUtil.getUsedMemory();