feat: add command to test smtp transport

src/Command/MailTestCommand.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Command;
+
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Mailer\MailerInterface;
+use Symfony\Component\Mime\Email;
+
+#[AsCommand(name: 'app:mail-test', description: 'Testing SMTP Transport')]
+class MailTestCommand extends Command
+{
+    public function __construct(private readonly MailerInterface $mailer)
+    {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this
+            ->addArgument('to', InputArgument::REQUIRED, 'Recipient email')
+            ->addArgument('from', InputArgument::OPTIONAL, 'Sender email', '[email protected]')
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $email = (new Email())
+            ->to($input->getArgument('to'))
+            ->from($input->getArgument('from'))
+            ->subject('Testing SMTP Transport')
+            ->text('Testing SMTP Transport');
+
+        $this->mailer->send($email);
+
+        return Command::SUCCESS;
+    }
+}