public static function suite()
{
$loader = (require __DIR__ . '/../vendor/autoload.php');
$loader->add('ProgressBar', __DIR__);
$suite = new PHPUnit_Framework_TestSuite("PHP-CLI-Progress-Bar");
foreach (self::$testClasses as $testClass) {
$suite->addTestSuite($testClass);
}
return $suite;
}