    @Test
    public void testReadableFileSize() {

        String result = Utils.readableFileSize(0);
        Assert.assertEquals("0 KB", result);

        result = Utils.readableFileSize(957498560);
        Assert.assertEquals("957.5 MB", result);

        result = Utils.readableFileSize(2579477837L);
        Assert.assertEquals("2.6 GB", result);

        result = Utils.readableFileSize(285008);
        Assert.assertEquals("285 KB", result);
    }