/**
  * @param string $columns
  *
  * @Then /^I should see the columns? (.*)$/
  */
 public function iShouldSeeTheColumns($columns)
 {
     $columns = $this->getMainContext()->listToArray($columns);
     $expectedColumns = count($columns);
     $countColumns = $this->datagrid->countColumns();
     if ($expectedColumns !== $countColumns) {
         throw $this->createExpectationException(sprintf('Expected %d columns but contains %d', $expectedColumns, $countColumns));
     }
     $expectedPosition = 0;
     foreach ($columns as $column) {
         $position = $this->datagrid->getColumnPosition($column);
         if ($expectedPosition++ !== $position) {
             throw $this->createExpectationException(sprintf('Column "%s" was expected in position %d, but was at %d', $column, $expectedPosition, $position));
         }
     }
 }