minor #58391 relax mock class name matching (xabbuh)

This PR was merged into the 7.2 branch.

Discussion
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relax mock class name matching

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Instead of performing some fuzzy matching on the automatically generated mock name (the pattern varies between different PHPUnit versions) we can simply use the actual exact class name.

Commits
-------

2c99e009d09 relax mock class name matching

Author: nicolas-grekas

Tests/Authentication/AuthenticatorManagerTest.php

@@ -368,7 +368,7 @@ public function log($level, $message, array $context = []): void
         $manager = $this->createManager([$authenticator], 'main', true, [], $logger);
         $response = $manager->authenticateRequest($this->request);
         $this->assertSame($this->response, $response);
-        $this->assertStringContainsString('Mock_TestInteractiveAuthenticator', $logger->logContexts[0]['authenticator']);
+        $this->assertStringContainsString($authenticator::class, $logger->logContexts[0]['authenticator']);
     }
 
     private function createAuthenticator(?bool $supports = true)

Tests/Controller/UserValueResolverTest.php

@@ -120,7 +120,7 @@ public function testResolveThrowsAccessDeniedWithWrongUserClass()
         $metadata = new ArgumentMetadata('foo', InMemoryUser::class, false, false, null, false, [new CurrentUser()]);
 
         $this->expectException(AccessDeniedException::class);
-        $this->expectExceptionMessageMatches('/^The logged-in user is an instance of "Mock_UserInterface[^"]+" but a user of type "Symfony\\\\Component\\\\Security\\\\Core\\\\User\\\\InMemoryUser" is expected.$/');
+        $this->expectExceptionMessageMatches(\sprintf('/^The logged-in user is an instance of "%s" but a user of type "Symfony\\\\Component\\\\Security\\\\Core\\\\User\\\\InMemoryUser" is expected.$/', $user::class));
         $resolver->resolve(Request::create('/'), $metadata);
     }