Pop\Image\Gd::getFormats PHP Method

    public function getFormats()
    {
        return array_keys($this->allowed);
    }

 public function testImageFormats()
 {
     $i = new Gd(__DIR__ . '/../tmp/test.jpg');
     $this->assertEquals(5, count($i->getFormats()));
     $this->assertEquals(5, $i->getNumberOfFormats());
 }