$this->userTester->addGroup( 'unittesters' );
$this->expiryTime = wfTimestamp( TS_MW, time() + 100500 );
$this->userTester->addGroup( 'testwriters', $this->expiryTime );
$this->userTester->addGroup( 'unittesters' );
$this->expiryTime = wfTimestamp( TS_MW, time() + 100500 );
$this->userTester->addGroup( 'testwriters', $this->expiryTime );