public function testFormatFilesize()
{
$b = 300;
$fix = Library::formatFilesize($b);
$this->assertEquals('300 B', $fix);
$k = 1027;
$fix = Library::formatFilesize($k);
$this->assertEquals('1.00 KiB', $fix);
$m = 1048577;
$fix = Library::formatFilesize($m);
$this->assertEquals('1.00 MiB', $fix);
}