public function testConsume()
{
$consumer = NaryConsumer::create(self::getCallable());
$a = rand(1, 100);
$b = rand(1, 100);
$c = rand(1, 100);
$d = rand(1, 100);
ob_start();
$consumer->consume($a, $b, $c, $d);
$result = trim(ob_get_clean());
$this->assertEquals("" . ($a + $b) * ($c + $d), $result);
}
/**
*
* @param callable $consumer
* @return NaryConsumerInterface
*/
public static final function newNaryConsumer(callable $consumer) : NaryConsumerInterface
{
return NaryConsumer::create($consumer);
}