/**
  * try to set content seq that was NULL / test with deleted container
  */
 public function testSetNullContentSeq()
 {
     $container = $this->objects['initialContainer'];
     $db = Tinebase_Core::getDb();
     $db->update(SQL_TABLE_PREFIX . 'container', array('content_seq' => NULL), $db->quoteInto($db->quoteIdentifier('id') . ' = ?', $container->getId()));
     $seq = $this->_instance->getContentSequence($container->getId());
     $this->assertEquals(NULL, $seq);
     $this->_instance->increaseContentSequence($container->getId());
     $seq = $this->_instance->getContentSequence($container->getId());
     $this->assertEquals(1, $seq);
     $this->_instance->deleteContainer($container);
     $seq = $this->_instance->getContentSequence($container->getId());
     $this->assertEquals(1, $seq);
 }