public function testParseVMStat()
 {
     $tests = array('vmstat.yosemite.txt' => array('total' => 16503578624, 'free' => 1732366336));
     $dir = dirname(__FILE__) . '/memory';
     foreach ($tests as $input => $expect) {
         $raw = Filesystem::readFile($dir . '/' . $input);
         $actual = PhutilSystem::parseVMStat($raw);
         $this->assertEqual($expect, $actual, pht('Parse of "%s".', $input));
     }
 }