public function testConstructor()
{
$c = new Cmyk(20, 40, 60, 80);
$this->assertInstanceOf('Pop\\Color\\Space\\Cmyk', $c);
$this->assertEquals(20, $c->getCyan());
$this->assertEquals(40, $c->getMagenta());
$this->assertEquals(60, $c->getYellow());
$this->assertEquals(80, $c->getBlack());
}