public function testImageResource()
 {
     $object = new MemoryDrawing();
     $this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\MemoryDrawing', $object->setImageResource());
     $this->assertNull($object->getImageResource());
     $this->assertEquals(0, $object->getWidth());
     $this->assertEquals(0, $object->getHeight());
     $width = rand(1, 100);
     $height = rand(100, 200);
     $gdImage = @imagecreatetruecolor($width, $height);
     $this->assertInstanceOf('PhpOffice\\PhpPowerpoint\\Shape\\MemoryDrawing', $object->setImageResource($gdImage));
     $this->assertTrue(is_resource($object->getImageResource()));
     $this->assertEquals($width, $object->getWidth());
     $this->assertEquals($height, $object->getHeight());
 }