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()); }