Merge branch '2.8' into 3.1

* 2.8:
  [Validator][GroupSequence] fixed GroupSequence validation ignores PropertyMetadata of parent classes
  [FrameworkBundle][Security] Remove useless mocks
  [DoctrineBridge] Enhance exception message in EntityUserProvider
  added friendly exception when constraint validator does not exist or it is not enabled
  remove duplicate instruction
  [FrameworkBundle] Remove TranslatorBagInterface check
  [FrameworkBundle] Remove duplicated code in RouterDebugCommand
  [Validator] fixed duplicate constraints with parent class interfaces
  SecurityBundle:BasicAuthenticationListener: removed a default argument on getting a header value

Author: nicolas-grekas

Security/User/EntityUserProvider.php

@@ -51,7 +51,7 @@ public function loadUserByUsername($username)
             $user = $repository->findOneBy(array($this->property => $username));
         } else {
             if (!$repository instanceof UserLoaderInterface) {
-                throw new \InvalidArgumentException(sprintf('The Doctrine repository "%s" must implement Symfony\Bridge\Doctrine\Security\User\UserLoaderInterface.', get_class($repository)));
+                throw new \InvalidArgumentException(sprintf('You must either make the "%s" entity Doctrine Repository ("%s") implement "Symfony\Component\Security\Core\User\UserProviderInterface" or set the "property" option in the corresponding entity provider configuration.', $this->classOrAlias, get_class($repository)));
             }
 
             $user = $repository->loadUserByUsername($username);

Tests/Security/User/EntityUserProviderTest.php

@@ -38,6 +38,39 @@ public function testRefreshUserGetsUserByPrimaryKey()
         $this->assertSame($user1, $provider->refreshUser($user1));
     }
 
+    public function testLoadUserByUsername()
+    {
+        $em = DoctrineTestHelper::createTestEntityManager();
+        $this->createSchema($em);
+
+        $user = new User(1, 1, 'user1');
+
+        $em->persist($user);
+        $em->flush();
+
+        $provider = new EntityUserProvider($this->getManager($em), 'Symfony\Bridge\Doctrine\Tests\Fixtures\User', 'name');
+
+        $this->assertSame($user, $provider->loadUserByUsername('user1'));
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage You must either make the "Symfony\Bridge\Doctrine\Tests\Fixtures\User" entity Doctrine Repository ("Doctrine\ORM\EntityRepository") implement "Symfony\Component\Security\Core\User\UserProviderInterface" or set the "property" option in the corresponding entity provider configuration.
+     */
+    public function testLoadUserByUsernameWithNonUserProviderRepositoryAndWithoutProperty()
+    {
+        $em = DoctrineTestHelper::createTestEntityManager();
+        $this->createSchema($em);
+
+        $user = new User(1, 1, 'user1');
+
+        $em->persist($user);
+        $em->flush();
+
+        $provider = new EntityUserProvider($this->getManager($em), 'Symfony\Bridge\Doctrine\Tests\Fixtures\User');
+        $provider->loadUserByUsername('user1');
+    }
+
     public function testRefreshUserRequiresId()
     {
         $em = DoctrineTestHelper::createTestEntityManager();