[Monolog] Really reset logger when calling logger::reset()

src/Symfony/Bridge/Monolog/Logger.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Monolog;
 
 use Monolog\Logger as BaseLogger;
+use Monolog\ResettableInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
 use Symfony\Contracts\Service\ResetInterface;
@@ -73,6 +74,10 @@ class Logger extends BaseLogger implements DebugLoggerInterface, ResetInterface
     public function reset()
     {
         $this->clear();
+
+        if ($this instanceof ResettableInterface) {
+            parent::reset();
+        }
     }
 
     /**

src/Symfony/Bridge/Monolog/Tests/LoggerTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Monolog\Tests;
 
 use Monolog\Handler\TestHandler;
+use Monolog\ResettableInterface;
 use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Monolog\Logger;
 use Symfony\Bridge\Monolog\Processor\DebugProcessor;
@@ -108,6 +109,22 @@ class LoggerTest extends TestCase
         $this->assertSame(0, $logger->countErrors());
     }
 
+    public function testReset()
+    {
+        $handler = new TestHandler();
+        $logger = new Logger('test', [$handler]);
+        $logger->pushProcessor(new DebugProcessor());
+
+        $logger->info('test');
+        $logger->reset();
+
+        $this->assertEmpty($logger->getLogs());
+        $this->assertSame(0, $logger->countErrors());
+        if (class_exists(ResettableInterface::class)) {
+            $this->assertEmpty($handler->getRecords());
+        }
+    }
+
     /**
      * @group legacy
      * @expectedDeprecation The "Symfony\Bridge\Monolog\Logger::getLogs()" method will have a new "Request $request = null" argument in version 5.0, not defining it is deprecated since Symfony 4.2.