Description

Hello,

There is a little (annoying) piece of code in symfony, and I would like to enhance of it

If you want to configure the container before the first request, it's possible.
But if you already have issued a request, it's not possible anymore.

I know it's possible to disable the reboot() of the container, but it has drawbacks (that's why we added the reboot). And in my case I do want a restart!

Some code to understand:

class HomepageTest extends WebTestCase
{
    public function testSomething(): void
    {
        $client = static::createClient();

        // $client->disableReboot(); // it fix this issue, but it's a bad idea.

        $client->request('GET', '/');

        $this->assertResponseIsSuccessful();
        $this->assertSelectorTextContains('h1', 'Hello World');

        static::getContainer()->set(You::class, new class implements HelloInterface {
            public function hello(): string
            {
                return 'Hello mock';
            }
        });

        $client->request('GET', '/you');

        $this->assertResponseIsSuccessful();
        $this->assertSelectorTextContains('h1', 'Hello mock');
    }
}

This test does not work. Since the container is restarted just before issuing the second request, our mock doesn't exist anymore.

I would like to introduce something like this:

// test.php
$client->configureContainer(function ($container) {
    $container->set(You::class, new class implements HelloInterface {
        public function hello(): string
        {
            return 'Hello mock';
        }
    });
});

And this code will be execute after the reboot, but before the request is issued.

WDTY?

If accepted, I'll do the PR!

Side note: I tried so many things, like static::ensureKernelIsShutDown, or self::$kernel->shutdown() and nothing works! It's even worse : there is a miss-match between the kernel in the client and the one in the test (because everything is static)

Example

No response