feat(event-bus): wire mailer event bus into testing helpers

Author: laylatichy

packages/mail/src/Testing/TestingMailer.php

@@ -7,11 +7,13 @@
 use Tempest\Mail\EmailWasSent;
 use Tempest\Mail\Mailer;
 
+use function Tempest\get;
+
 final class TestingMailer implements Mailer
 {
-    public function __construct(
-        private readonly ?EventBus $eventBus = null,
-    ) {}
+    private EventBus $eventBus {
+        get => get(className: EventBus::class);
+    }
 
     /**
      * List of emails that would have been sent.

src/Tempest/Framework/Testing/IntegrationTest.php

@@ -142,9 +142,7 @@ protected function setupTesters(): self
         $this->eventBus = new EventBusTester($this->container);
         $this->storage = new StorageTester($this->container);
         $this->cache = new CacheTester($this->container);
-        $this->mailer = new MailTester(new TestingMailer(
-            eventBus: $this->container->get(EventBus::class),
-        ));
+        $this->mailer = new MailTester(new TestingMailer());
 
         $this->process = $this->container->get(ProcessTester::class);
         $this->process->disableProcessExecution();