fix XSD to allow to configure locks without resources

Author: xabbuh

src/Symfony/Bundle/FrameworkBundle/Resources/config/schema/symfony-1.0.xsd

@@ -492,7 +492,7 @@
 
     <xsd:complexType name="lock">
         <xsd:sequence>
-            <xsd:element name="resource" type="lock_resource" minOccurs="1" maxOccurs="unbounded" />
+            <xsd:element name="resource" type="lock_resource" minOccurs="0" maxOccurs="unbounded" />
         </xsd:sequence>
         <xsd:attribute name="enabled" type="xsd:boolean" />
     </xsd:complexType>

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/lock.php

@@ -0,0 +1,5 @@
+<?php
+
+$container->loadFromExtension('framework', [
+    'lock' => null,
+]);

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php

@@ -52,6 +52,7 @@
 use Symfony\Component\HttpFoundation\Session\SessionInterface;
 use Symfony\Component\HttpKernel\DependencyInjection\LoggerPass;
 use Symfony\Component\HttpKernel\Fragment\FragmentUriGeneratorInterface;
+use Symfony\Component\Lock\Store\SemaphoreStore;
 use Symfony\Component\Messenger\Transport\TransportFactory;
 use Symfony\Component\Notifier\ChatterInterface;
 use Symfony\Component\Notifier\TexterInterface;
@@ -2081,6 +2082,20 @@ public function testIfNotifierTransportsAreKnownByFrameworkExtension()
         }
     }
 
+    public function testDefaultLock()
+    {
+        $container = $this->createContainerFromFile('lock');
+
+        self::assertTrue($container->hasDefinition('lock.default.factory'));
+        $storeDef = $container->getDefinition($container->getDefinition('lock.default.factory')->getArgument(0));
+
+        if (class_exists(SemaphoreStore::class) && SemaphoreStore::isSupported()) {
+            self::assertEquals(new Reference('semaphore'), $storeDef->getArgument(0));
+        } else {
+            self::assertEquals(new Reference('flock'), $storeDef->getArgument(0));
+        }
+    }
+
     protected function createContainer(array $data = [])
     {
         return new ContainerBuilder(new EnvPlaceholderParameterBag(array_merge([