Merge branch '6.0' into 6.1

* 6.0:
  [Notifier] composer.json cleanup
  [HttpKernel] AbstractSessionListener should not override the cache lifetime for private responses
  [DependencyInjection] Shared private services becomes public after a public service is accessed
  [DI] Fix undefined class in test

Author: nicolas-grekas

EventListener/AbstractSessionListener.php

@@ -195,10 +195,11 @@ public function onKernelResponse(ResponseEvent $event)
         }
 
         if ($autoCacheControl) {
+            $maxAge = $response->headers->hasCacheControlDirective('public') ? 0 : (int) $response->getMaxAge();
             $response
-                ->setExpires(new \DateTime())
+                ->setExpires(new \DateTimeImmutable('+'.$maxAge.' seconds'))
                 ->setPrivate()
-                ->setMaxAge(0)
+                ->setMaxAge($maxAge)
                 ->headers->addCacheControlDirective('must-revalidate');
         }
 

Tests/EventListener/SessionListenerTest.php

@@ -38,6 +38,7 @@ class SessionListenerTest extends TestCase
 {
     /**
      * @dataProvider provideSessionOptions
+     *
      * @runInSeparateProcess
      */
     public function testSessionCookieOptions(array $phpSessionOptions, array $sessionOptions, array $expectedSessionOptions)
@@ -554,6 +555,64 @@ public function testUninitializedSessionWithoutInitializedSession()
         $this->assertSame('60', $response->headers->getCacheControlDirective('s-maxage'));
     }
 
+    public function testResponseHeadersMaxAgeAndExpiresNotBeOverridenIfSessionStarted()
+    {
+        $session = $this->createMock(Session::class);
+        $session->expects($this->exactly(2))->method('getUsageIndex')->will($this->onConsecutiveCalls(0, 1));
+
+        $container = new Container();
+        $container->set('initialized_session', $session);
+
+        $listener = new SessionListener($container);
+        $kernel = $this->createMock(HttpKernelInterface::class);
+
+        $request = new Request();
+        $listener->onKernelRequest(new RequestEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST));
+
+        $response = new Response();
+        $response->setPrivate();
+        $expiresHeader = gmdate('D, d M Y H:i:s', time() + 600).' GMT';
+        $response->setMaxAge(600);
+        $listener->onKernelResponse(new ResponseEvent($kernel, new Request(), HttpKernelInterface::MAIN_REQUEST, $response));
+
+        $this->assertTrue($response->headers->has('expires'));
+        $this->assertSame($expiresHeader, $response->headers->get('expires'));
+        $this->assertFalse($response->headers->has('max-age'));
+        $this->assertSame('600', $response->headers->getCacheControlDirective('max-age'));
+        $this->assertFalse($response->headers->hasCacheControlDirective('public'));
+        $this->assertTrue($response->headers->hasCacheControlDirective('private'));
+        $this->assertTrue($response->headers->hasCacheControlDirective('must-revalidate'));
+        $this->assertFalse($response->headers->has(AbstractSessionListener::NO_AUTO_CACHE_CONTROL_HEADER));
+    }
+
+    public function testResponseHeadersMaxAgeAndExpiresDefaultValuesIfSessionStarted()
+    {
+        $session = $this->createMock(Session::class);
+        $session->expects($this->exactly(2))->method('getUsageIndex')->will($this->onConsecutiveCalls(0, 1));
+
+        $container = new Container();
+        $container->set('initialized_session', $session);
+
+        $listener = new SessionListener($container);
+        $kernel = $this->createMock(HttpKernelInterface::class);
+
+        $request = new Request();
+        $listener->onKernelRequest(new RequestEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST));
+
+        $response = new Response();
+        $expiresHeader = gmdate('D, d M Y H:i:s', time()).' GMT';
+        $listener->onKernelResponse(new ResponseEvent($kernel, new Request(), HttpKernelInterface::MAIN_REQUEST, $response));
+
+        $this->assertTrue($response->headers->has('expires'));
+        $this->assertSame($expiresHeader, $response->headers->get('expires'));
+        $this->assertFalse($response->headers->has('max-age'));
+        $this->assertSame('0', $response->headers->getCacheControlDirective('max-age'));
+        $this->assertFalse($response->headers->hasCacheControlDirective('public'));
+        $this->assertTrue($response->headers->hasCacheControlDirective('private'));
+        $this->assertTrue($response->headers->hasCacheControlDirective('must-revalidate'));
+        $this->assertFalse($response->headers->has(AbstractSessionListener::NO_AUTO_CACHE_CONTROL_HEADER));
+    }
+
     public function testSurrogateMainRequestIsPublic()
     {
         $session = $this->createMock(Session::class);