/**
  * try to add list member
  */
 public function testAddListMember()
 {
     $list = $this->testAddList();
     $list->members = array($this->objects['contact2']);
     $list = $this->_instance->update($list);
     $list = $this->_instance->addListMember($list, $this->objects['contact1']);
     $this->assertTrue(in_array($this->objects['contact1']->getId(), $list->members), 'contact1 not found in members: ' . print_r($list->members, TRUE));
     $this->assertTrue(in_array($this->objects['contact2']->getId(), $list->members), 'contact2 not found in members: ' . print_r($list->members, TRUE));
 }