* $tee = CRM_Utils_ConsoleTee::create()->start();
* echo "hello world";
* $tee->stop();
* assertEquals("hello world", file_get_contents($tee->getFileName()));
* $tee = CRM_Utils_ConsoleTee::create()->start();
* echo "hello world";
* $tee->stop();
* assertEquals("hello world", file_get_contents($tee->getFileName()));