[Security] validate empty passwords again

src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php

@@ -90,6 +90,29 @@ abstract class UserPasswordValidatorTest extends AbstractConstraintValidatorTest
             ->assertRaised();
     }
 
+    /**
+     * @dataProvider emptyPasswordData
+     */
+    public function testEmptyPasswordsAreNotValid($password)
+    {
+        $constraint = new UserPassword(array(
+            'message' => 'myMessage',
+        ));
+
+        $this->validator->validate($password, $constraint);
+
+        $this->buildViolation('myMessage')
+            ->assertRaised();
+    }
+
+    public function emptyPasswordData()
+    {
+        return array(
+            array(null),
+            array(''),
+        );
+    }
+
     /**
      * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
      */

src/Symfony/Component/Security/Core/Validator/Constraints/UserPasswordValidator.php

@@ -40,6 +40,8 @@ class UserPasswordValidator extends ConstraintValidator
         }
 
         if (null === $password || '' === $password) {
+            $this->context->addViolation($constraint->message);
+
             return;
         }