PhpOffice\PhpPresentation\DocumentLayout::setCX PHP Method

    public function setCX($value, $unit = self::UNIT_EMU)
    {
        $this->layout = self::LAYOUT_CUSTOM;
        $this->dimensionX = $this->convertUnit($value, $unit, self::UNIT_EMU);
        return $this;
    }

 public function testCX()
 {
     $value = rand(1, 100000);
     $object = new DocumentLayout();
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value));
     $this->assertEquals($value, $object->getCX());
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_CENTIMETER));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_CENTIMETER));
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_EMU));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_EMU));
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_INCH));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_INCH));
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_MILLIMETER));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_MILLIMETER));
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_POINT));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_POINT));
     $this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentLayout', $object->setCX($value, DocumentLayout::UNIT_PIXEL));
     $this->assertEquals($value, $object->getCX(DocumentLayout::UNIT_PIXEL));
 }