How to test semaphores with PHPUnit - php

Question

I'm using The Symfony Lock package to check if a class method can be executed
if ($this->lock->acquire()) {
$this->execute();
$this->lock->release();
}
Important: I'm not using the Symfony Framework, only the Lock component
I want to make a test that asserts that the execution is locked when running in multiple threads, but I have not found any documentation on how to achieve this.
Is it a good idea to use pthreads? If not, which is the best way to make this test?
Thank you very much.

Answer 1

Referring to the Lock Component documentation :
https://symfony.com/doc/current/components/lock.html#usage
Information on the CommandTester :
https://symfony.com/doc/current/console.html#testing-commands
Solution for PHPUnit test :
use Symfony\Component\Lock\Factory;
use Symfony\Component\Lock\Store\SemaphoreStore;
public function testLockIsSet()
{
// Create a new Semaphore lock with the same ID as the one that would be
// created if you were running the command / class / process etc.
$store = new SemaphoreStore();
$factory = new Factory($store);
$lock = $factory->createLock('lock-name-used-eg-generate-pdf');
if ($lock->acquire()) {
// In my use case I was running multiple commands to see if the lock
// was working properly
$commandTester = new CommandTester($this->command);
// Try and run the command. The lock should already be set.
$commandTester->execute(
[
'command' => $this->command->getName()
]
);
// You could also use expectException() here for LogicException
$this->assertContains(
'The command is already running in locked mode.',
$commandTester->getDisplay()
);
$lock->release();
}
}