NilPortugues\Sql\QueryBuilder\Manipulation\Select::getColumns PHP Method

    public function getColumns()
    {
        return $this->columnQuery->getColumns();
    }

 /**
  * @test
  */
 public function itShouldThrowExceptionWhenGettingColumnsButNoTableIsSet()
 {
     $this->setExpectedException($this->exceptionClass);
     $this->query = new Select();
     $this->query->getColumns();
 }