fix handling of a default 'template' as a string

src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php

@@ -99,7 +99,11 @@ class HIncludeFragmentRenderer extends RoutableFragmentRenderer
     private function templateExists($template)
     {
         if ($this->templating instanceof EngineInterface) {
-            return $this->templating->exists($template);
+            try {
+                return $this->templating->exists($template);
+            } catch (\InvalidArgumentException $e) {
+                return false;
+            }
         }
 
         $loader = $this->templating->getLoader();

src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php

@@ -50,7 +50,7 @@ class HIncludeFragmentRendererTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('<hx:include src="/foo"></hx:include>', $strategy->render('/foo', Request::create('/'))->getContent());
     }
 
-    public function testRenderWhithDefault()
+    public function testRenderWithDefault()
     {
         // only default
         $strategy = new HIncludeFragmentRenderer();
@@ -64,4 +64,17 @@ class HIncludeFragmentRendererTest extends \PHPUnit_Framework_TestCase
         $strategy = new HIncludeFragmentRenderer(null, null, 'global_default');
         $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default'))->getContent());
     }
-}
+
+    public function testRenderWithDefaultText()
+    {
+        $engine = $this->getMock('Symfony\\Component\\Templating\\EngineInterface');
+        $engine->expects($this->once())
+            ->method('exists')
+            ->with('default')
+            ->will($this->throwException(new \InvalidArgumentException()));
+
+        // only default
+        $strategy = new HIncludeFragmentRenderer($engine);
+        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default'))->getContent());
+    }
+}