Browscap\Writer\WriterCollection::renderAllDivisionsHeader PHP Метод

    public function renderAllDivisionsHeader(DataCollection $collection)
    {
        foreach ($this->writers as $writer) {
            $writer->renderAllDivisionsHeader($collection);
        }
        return $this;
    }

 /**
  * tests rendering the header for all division
  *
  * @group writer
  * @group sourcetest
  */
 public function testRenderAllDivisionsHeader()
 {
     $mockCollection = $this->getMock('\\Browscap\\Data\\DataCollection', array(), array(), '', false);
     $mockWriter = $this->getMock('\\Browscap\\Writer\\CsvWriter', array(), array(), '', false);
     self::assertSame($this->object, $this->object->addWriter($mockWriter));
     self::assertSame($this->object, $this->object->renderAllDivisionsHeader($mockCollection));
 }