public function testGetAdapter()
{
$this->assertInstanceOf('\\ColorThief\\Image\\Adapter\\ImagickImageAdapter', $this->loader->getAdapter("Imagick"));
$this->assertInstanceOf('\\ColorThief\\Image\\Adapter\\GDImageAdapter', $this->loader->getAdapter("GD"));
$this->assertInstanceOf('\\ColorThief\\Image\\Adapter\\GmagickImageAdapter', $this->loader->getAdapter("Gmagick"));
}