[Messenger] Adding exception to amqp transport in case amqp ext is not installed

src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportFactoryTest.php

@@ -28,6 +28,9 @@ class AmqpTransportFactoryTest extends TestCase
         $this->assertFalse($factory->supports('invalid-dsn', []));
     }
 
+    /**
+     * @requires extension amqp
+     */
     public function testItCreatesTheTransport()
     {
         $factory = new AmqpTransportFactory();

src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Messenger\Transport\AmqpExt;
 
 use Symfony\Component\Messenger\Exception\InvalidArgumentException;
+use Symfony\Component\Messenger\Exception\LogicException;
 
 /**
  * An AMQP connection.
@@ -60,6 +61,10 @@ class Connection
 
     public function __construct(array $connectionOptions, array $exchangeOptions, array $queuesOptions, AmqpFactory $amqpFactory = null)
     {
+        if (!\extension_loaded('amqp')) {
+            throw new LogicException(sprintf('You cannot use the "%s" as the "amqp" extension is not installed.', __CLASS__));
+        }
+
         $this->connectionOptions = array_replace_recursive([
             'delay' => [
                 'exchange_name' => 'delays',