PHPUnit mock object with strict parameter comparison

Question

With a mock object, I am able to quickly verify if a passed parameter of a method is equal to my original object thanks to the with method:

$hosting = new Hosting();

$this->entityManager
    ->expects($this->once())
    ->method('persist')
    ->with($hosting)
;
$this->persister->persist($hosting);

However, this test is not fully reliable. If I replace the $hosting parameter from the internal EntityManager::persist method by a new Hosting() instance, the test will pass when it should not.

To fix that, I have to put a custom callback:

$this->entityManager
    ->expects($this->once())
    ->method('persist')
    ->with(self::callback(static fn ($parameter) => $parameter === $hosting))
;

It works like a charm. However, I would like to have a simpler method call. Something like withSame.

I search on the official documentation without success.

Do we have a simpler way to achieve that?

Answer 1

I found a simpler way using the PHPUnit assert static function:

$this->entityManager
    ->expects($this->once())
    ->method('persist')
    ->with(self::identicalTo($hosting))
;

I found that by digging on the code where the callback function is defined. There are many more!