Pop\Graph\Graph::setStrokeWidth PHP Method

    public function setStrokeWidth($width = 1)
    {
        $this->strokeWidth = $width;
        return $this;
    }

 public function testSetStrokeWidth()
 {
     $g = new Graph($this->imageOptions);
     $g->setStrokeWidth(5);
     $this->assertEquals(5, $g->getStrokeWidth());
 }