public function testPassWithoutIcon()
{
self::assertArrayNotHasKey('icon', $this->pass->getImages(), 'pass must not have an icon for test to be valid');
$this->assertFails($this->pass, PassValidator::ICON_REQUIRED);
$icon = new Image(__DIR__ . '/../../img/icon.png', 'icon');
$this->pass->addImage($icon);
$this->assertPasses($this->pass, PassValidator::ICON_REQUIRED);
}