public static function call_simpletest(pakeTask $task, $type = 'text', $dirs = array())
 {
     if (!class_exists('TestSuite')) {
         throw new pakeException('You must install SimpleTest to use this task.');
     }
     SimpleTest::ignore('UnitTestCase');
     $base_test_dir = 'test';
     $test_dirs = array();
     // run tests only in these subdirectories
     if ($dirs) {
         foreach ($dirs as $dir) {
             $test_dirs[] = $base_test_dir . DIRECTORY_SEPARATOR . $dir;
         }
     } else {
         $test_dirs[] = $base_test_dir;
     }
     $files = pakeFinder::type('file')->name('*Test.php')->in($test_dirs);
     if (count($files) == 0) {
         throw new pakeException('No test to run.');
     }
     $test = new TestSuite('Test suite in (' . implode(', ', $test_dirs) . ')');
     foreach ($files as $file) {
         $test->addFile($file);
     }
     ob_start();
     if ($type == 'html') {
         $result = $test->run(new HtmlReporter());
     } else {
         if ($type == 'xml') {
             $result = $test->run(new XmlReporter());
         } else {
             $result = $test->run(new TextReporter());
         }
     }
     $content = ob_get_contents();
     ob_end_clean();
     if ($task->is_verbose()) {
         echo $content;
     }
 }