public function testAddArc()
{
$i = new Gd(__DIR__ . '/../tmp/test.jpg');
$i->setStrokeColor(new Rgb(0, 0, 0))->drawArc(320, 240, 0, 120, 100, 100);
$i->setBackgroundColor(new Rgb(255, 0, 0));
$i->drawArc(320, 240, 0, 120, 100, 100);
$i->setFillColor(new Rgb(255, 0, 0));
$i->drawArc(320, 240, 0, 120, 100, 100);
$this->assertEquals(640, $i->getWidth());
}