Imbo\EventManager\Event::setArguments PHP Method

    public function setArguments(array $arguments = [])
    {
        $this->arguments = $arguments;
        return $this;
    }

 /**
  * @dataProvider getParamsForWatermarks
  * @covers Imbo\Image\Transformation\Watermark::transform
  */
 public function testApplyToImageTopLeftWithOnlyWidthAndDefaultWatermark($params, $colors)
 {
     $blob = file_get_contents(FIXTURES_DIR . '/white.png');
     $image = new Image();
     $image->setBlob($blob);
     $image->setWidth($this->width);
     $image->setHeight($this->height);
     $transformation = $this->getTransformation();
     $transformation->setDefaultImage($this->watermarkImg);
     $expectedWatermark = $this->watermarkImg;
     if (isset($params['img'])) {
         $expectedWatermark = $params['img'];
     }
     $storage = $this->getMock('Imbo\\Storage\\StorageInterface');
     $storage->expects($this->once())->method('getImage')->with('someUser', $expectedWatermark)->will($this->returnValue(file_get_contents(FIXTURES_DIR . '/black.png')));
     $request = $this->getMock('Imbo\\Http\\Request\\Request');
     $request->expects($this->once())->method('getUser')->will($this->returnValue('someUser'));
     $event = new Event();
     $event->setArguments(['image' => $image, 'params' => $params, 'storage' => $storage, 'request' => $request]);
     $imagick = new Imagick();
     $imagick->readImageBlob($blob);
     $transformation->setImagick($imagick)->transform($event);
     foreach ($colors as $c) {
         $this->verifyColor($imagick, $c['x'], $c['y'], $c['colors']);
     }
 }