minor symfony#23567 [TwigBridge] fix tests (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
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[TwigBridge] fix tests

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

~The changed test did not pass locally. I do probably miss something important, but I fail to see why this did not occur when running the tests on Travis CI.~ Never mind, I was looking at the wrong build. It fails on Travis CI too.

Commits
-------

62410b6 [TwigBridge] fix tests

Author: fabpot

src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php

@@ -13,6 +13,9 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Node\FormThemeNode;
+use Symfony\Bridge\Twig\Tests\Extension\RuntimeLoaderProvider;
+use Symfony\Component\Form\FormRenderer;
+use Symfony\Component\Form\FormRendererEngineInterface;
 use Twig\Compiler;
 use Twig\Environment;
 use Twig\Node\Expression\ArrayExpression;
@@ -22,6 +25,8 @@
 
 class FormThemeTest extends TestCase
 {
+    use RuntimeLoaderProvider;
+
     public function testConstructor()
     {
         $form = new NameExpression('form', 0);
@@ -48,11 +53,14 @@ public function testCompile()
 
         $node = new FormThemeNode($form, $resources, 0);
 
-        $compiler = new Compiler(new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock()));
+        $environment = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock());
+        $formRenderer = new FormRenderer($this->getMockBuilder(FormRendererEngineInterface::class)->getMock());
+        $this->registerTwigRuntimeLoader($environment, $formRenderer);
+        $compiler = new Compiler($environment);
 
         $this->assertEquals(
             sprintf(
-                '$this->env->getRuntime(\'Symfony\Component\Form\FormRenderer\')->setTheme(%s, array(0 => "tpl1", 1 => "tpl2"));',
+                '$this->env->getRuntime("Symfony\\\\Component\\\\Form\\\\FormRenderer")->setTheme(%s, array(0 => "tpl1", 1 => "tpl2"));',
                 $this->getVariableGetter('form')
              ),
             trim($compiler->compile($node)->getSource())
@@ -64,7 +72,7 @@ public function testCompile()
 
         $this->assertEquals(
             sprintf(
-                '$this->env->getRuntime(\'Symfony\Component\Form\FormRenderer\')->setTheme(%s, "tpl1");',
+                '$this->env->getRuntime("Symfony\\\\Component\\\\Form\\\\FormRenderer")->setTheme(%s, "tpl1");',
                 $this->getVariableGetter('form')
              ),
             trim($compiler->compile($node)->getSource())