/**
  * try to set the expirydate
  *
  */
 public function testSetExpiryDate()
 {
     $user = $this->testAddUser();
     $this->_backend->setExpiryDate($user, Tinebase_DateTime::now()->subDay(1));
     $testUser = $this->_backend->getUserById($user, 'Tinebase_Model_FullUser');
     $this->assertEquals('Tinebase_DateTime', get_class($testUser->accountExpires), 'wrong type');
     $this->assertEquals(Tinebase_User::STATUS_EXPIRED, $testUser->accountStatus);
     $this->_backend->setExpiryDate($user, NULL);
     $testUser = $this->_backend->getUserById($user, 'Tinebase_Model_FullUser');
     $this->assertEquals(NULL, $testUser->accountExpires);
     $this->assertEquals(Tinebase_User::STATUS_ENABLED, $testUser->accountStatus);
 }