[symfony] Skip Symfony\Component\Mailer\Transport in PreferInterfaceInConstructorRule

src/Enum/SymfonyClass.php

@@ -41,4 +41,6 @@ final class SymfonyClass
     public const string CONTAINER_CONFIGURATOR = 'Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator';
 
     public const string IS_GRANTED = 'Symfony\Component\Security\Http\Attribute\IsGranted';
+
+    public const string MAILER_TRANSPORT = 'Symfony\Component\Mailer\Transport';
 }

src/Rules/Symfony/PreferInterfaceInConstructorRule.php

@@ -14,6 +14,7 @@
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleErrorBuilder;
 use Symplify\PHPStanRules\Enum\RuleIdentifier;
+use Symplify\PHPStanRules\Enum\SymfonyClass;
 
 /**
  * A constructor dependency must be autowired by its interface, not by the concrete class.
@@ -38,6 +39,11 @@
      */
     private const array HANDLED_NAMESPACE_PREFIXES = ['Symfony\\', 'Doctrine\\'];
 
+    /**
+     * @var string[]
+     */
+    private const array SKIPPED_CLASSES = [SymfonyClass::MAILER_TRANSPORT];
+
     public function __construct(
         private ReflectionProvider $reflectionProvider,
     ) {
@@ -96,6 +102,10 @@ private function matchImplementedSameNamedInterface(string $className): ?string
             return null;
         }
 
+        if (in_array($className, self::SKIPPED_CLASSES, true)) {
+            return null;
+        }
+
         if (! $this->reflectionProvider->hasClass($className)) {
             return null;
         }

stubs/Symfony/Component/Mailer/Transport.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Symfony\Component\Mailer;
+
+if (class_exists('Symfony\Component\Mailer\Transport')) {
+    return;
+}
+
+final class Transport implements TransportInterface
+{
+}

stubs/Symfony/Component/Mailer/TransportInterface.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Symfony\Component\Mailer;
+
+if (interface_exists('Symfony\Component\Mailer\TransportInterface')) {
+    return;
+}
+
+interface TransportInterface
+{
+}

tests/Rules/Symfony/PreferInterfaceInConstructorRule/Fixture/SkipMailerTransport.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\PHPStanRules\Tests\Rules\Symfony\PreferInterfaceInConstructorRule\Fixture;
+
+use Symfony\Component\Mailer\Transport;
+
+final class SkipMailerTransport
+{
+    public function __construct(
+        private Transport $transport,
+    ) {
+    }
+}

tests/Rules/Symfony/PreferInterfaceInConstructorRule/PreferInterfaceInConstructorRuleTest.php

@@ -42,6 +42,7 @@ public static function provideData(): Iterator
 
         yield [__DIR__ . '/Fixture/SkipRouterInterface.php', []];
         yield [__DIR__ . '/Fixture/SkipProjectClass.php', []];
+        yield [__DIR__ . '/Fixture/SkipMailerTransport.php', []];
     }
 
     /**