feature #46315 [Mailer] max_per_second option configurable via DSN (gassan)

This PR was merged into the 6.2 branch.

Discussion
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[Mailer] `max_per_second` option configurable via DSN

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | symfony/symfony-docs#16800

This option is available since 5.1, but it was impossible to configure it by dsn.

Commits
-------

a377f2e104 made max_per_second option configurable by dsn

Author: fabpot

Tests/Transport/Smtp/EsmtpTransportFactoryTest.php

@@ -116,6 +116,14 @@ public function createProvider(): iterable
             $transport,
         ];
 
+        $transport = new EsmtpTransport('example.com', 465, true, $eventDispatcher, $logger);
+        $transport->setMaxPerSecond(2.0);
+
+        yield [
+            new Dsn('smtps', 'example.com', '', '', 465, ['max_per_second' => '2']),
+            $transport,
+        ];
+
         $transport = new EsmtpTransport('example.com', 465, true, $eventDispatcher, $logger);
         $transport->setRestartThreshold(10, 1);
 

Transport/Smtp/EsmtpTransportFactory.php

@@ -52,6 +52,10 @@ public function create(Dsn $dsn): TransportInterface
             $transport->setLocalDomain($localDomain);
         }
 
+        if (null !== ($maxPerSecond = $dsn->getOption('max_per_second'))) {
+            $transport->setMaxPerSecond((float) $maxPerSecond);
+        }
+
         if (null !== ($restartThreshold = $dsn->getOption('restart_threshold'))) {
             $transport->setRestartThreshold((int) $restartThreshold, (int) $dsn->getOption('restart_threshold_sleep', 0));
         }