public function testGetGroupLabels()
{
$entity = new Contact();
$this->assertEquals(array(), $entity->getGroupLabels());
$groupOne = new Group('Group One');
$entity->addGroup($groupOne);
$this->assertEquals(array('Group One'), $entity->getGroupLabels());
$groupTwo = new Group('Group Two');
$entity->addGroup($groupTwo);
$this->assertEquals(array('Group One', 'Group Two'), $entity->getGroupLabels());
$entity->removeGroup($groupOne);
$this->assertEquals(array('Group Two'), $entity->getGroupLabels());
}
