/**
* @magentoAppIsolation enabled
*/
public function testSortColumnsByOrder()
{
$columnNames = $this->_block->getLayout()->getChildNames($this->_block->getColumnSet()->getNameInLayout());
$this->assertEquals($this->_block->getColumn('column1')->getNameInLayout(), $columnNames[0]);
$this->_block->addColumnsOrder('column1', 'column2');
$this->_block->sortColumnsByOrder();
$columnNames = $this->_block->getLayout()->getChildNames($this->_block->getColumnSet()->getNameInLayout());
$this->assertEquals($this->_block->getColumn('column2')->getNameInLayout(), $columnNames[0]);
}