function testGetCommentators()
{
$c1 = new MockTracker_Artifact_Changeset();
$c2 = new MockTracker_Artifact_Changeset();
$c3 = new MockTracker_Artifact_Changeset();
$c4 = new MockTracker_Artifact_Changeset();
$u1 = mock('PFUser');
$u1->setReturnValue('getUserName', 'sandrae');
$u2 = mock('PFUser');
$u2->setReturnValue('getUserName', 'marc');
$um = new MockUserManager();
$um->setReturnReference('getUserById', $u1, array(101));
$um->setReturnReference('getUserById', $u2, array(102));
$artifact = new Tracker_ArtifactTestVersion();
$artifact->setReturnValue('getChangesets', array($c1, $c2, $c3, $c4));
$artifact->setReturnValue('getUserManager', $um);
$c1->setReturnValue('getSubmittedBy', 101);
$c2->setReturnValue('getSubmittedBy', 102);
$c2->setReturnValue('getEmail', '*****@*****.**');
$c3->setReturnValue('getSubmittedBy', null);
$c3->setReturnValue('getEmail', '*****@*****.**');
$c4->setReturnValue('getSubmittedBy', null);
$c4->setReturnValue('getEmail', '');
$this->assertEqual($artifact->getCommentators(), array('sandrae', 'marc', '*****@*****.**'));
}