minor #18321 [2.8] fix mocks (xabbuh)

This PR was squashed before being merged into the 2.8 branch (closes #18321).

Discussion
----------

[2.8] fix mocks

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

7dff706 [2.8] fix mocks

phpunit

@@ -11,7 +11,7 @@
  */
 
 // Please update when phpunit needs to be reinstalled with fresh deps:
-// Cache-Id-Version: 2016-03-23 14:50 UTC
+// Cache-Id-Version: 2016-03-25 09:45 UTC
 
 use Symfony\Component\Process\ProcessUtils;
 

src/Symfony/Bundle/TwigBundle/Tests/Extension/LegacyAssetsExtensionTest.php

@@ -19,6 +19,13 @@ use Symfony\Bundle\TwigBundle\Tests\TestCase;
  */
 class LegacyAssetsExtensionTest extends TestCase
 {
+    protected function setUp()
+    {
+        if (!class_exists('Symfony\Component\Templating\Helper\CoreAssetsHelper')) {
+            $this->markTestSkipped('The CoreAssetsHelper class does only exist with symfony/templating < 3.0 installed.');
+        }
+    }
+
     /**
      * @dataProvider provideGetAssetUrlArguments
      */

src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php

@@ -21,6 +21,7 @@ use Symfony\Component\Form\SubmitButtonBuilder;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\Valid;
+use Symfony\Component\Validator\ExecutionContextInterface;
 use Symfony\Component\Validator\Tests\Constraints\AbstractConstraintValidatorTest;
 use Symfony\Component\Validator\Validation;
 
@@ -629,8 +630,11 @@ class FormValidatorTest extends AbstractConstraintValidatorTest
 
         $context->expects($this->never())
             ->method('addViolation');
-        $context->expects($this->never())
-            ->method('addViolationAt');
+
+        if ($context instanceof ExecutionContextInterface) {
+            $context->expects($this->never())
+                ->method('addViolationAt');
+        }
 
         $this->validator->initialize($context);
         $this->validator->validate($form, new Form());

src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Form\Tests\Extension\Validator;
 
 use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
+use Symfony\Component\Validator\ValidatorInterface;
 
 class ValidatorExtensionTest extends \PHPUnit_Framework_TestCase
 {
@@ -38,9 +39,11 @@ class ValidatorExtensionTest extends \PHPUnit_Framework_TestCase
             ->method('addPropertyConstraint')
             ->with('children', $this->isInstanceOf('Symfony\Component\Validator\Constraints\Valid'));
 
-        $validator
-            ->expects($this->never())
-            ->method('getMetadataFactory');
+        if ($validator instanceof ValidatorInterface) {
+            $validator
+                ->expects($this->never())
+                ->method('getMetadataFactory');
+        }
 
         $extension = new ValidatorExtension($validator);
         $guesser = $extension->loadTypeGuesser();

src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php

@@ -66,10 +66,7 @@ class DelegatingEngineTest extends \PHPUnit_Framework_TestCase
      */
     public function testStreamRequiresStreamingEngine()
     {
-        $engine = $this->getEngineMock('template.php', true);
-        $engine->expects($this->never())->method('stream');
-
-        $delegatingEngine = new DelegatingEngine(array($engine));
+        $delegatingEngine = new DelegatingEngine(array(new TestEngine()));
         $delegatingEngine->stream('template.php', array('foo' => 'bar'));
     }
 
@@ -155,3 +152,23 @@ class DelegatingEngineTest extends \PHPUnit_Framework_TestCase
 interface MyStreamingEngine extends StreamingEngineInterface, EngineInterface
 {
 }
+
+class TestEngine implements EngineInterface
+{
+    public function render($name, array $parameters = array())
+    {
+    }
+
+    public function exists($name)
+    {
+    }
+
+    public function supports($name)
+    {
+        return true;
+    }
+
+    public function stream()
+    {
+    }
+}