function testIO()
{
$gzip = new IO\Process("gzip -1");
$base = new IO\Process("base64");
$func = new IO\Filter(function ($f, $data, $eof) {
return strrev($data);
});
fwrite($gzip->getInput(), "Hello World!\n");
fclose($gzip->getInput());
$ticker = new Ticker();
$ticker->pipe($gzip, $base, $func, "fpassthru");
ob_start();
while ($ticker(1)) {
}
$this->assertStringMatchesFormat("\nAAAAN0HFd3NACQeUJp8LPjwVJnczIN/AEI%sAIs4H", ob_get_contents());
}
