Merge pull request #1849 from bolt/feature/extension-twig-test

Check if extension exists as a twig test

src/Twig/ExtensionExtension.php

@@ -8,6 +8,7 @@
 use Tightenco\Collect\Support\Collection;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
+use Twig\TwigTest;
 
 /**
  * Widget functionality Twig extension.
@@ -22,6 +23,13 @@ public function __construct(ExtensionRegistry $registry)
         $this->registry = $registry;
     }
 
+    public function getTests()
+    {
+        return [
+            new TwigTest('extension', [$this, 'extensionExists']),
+        ];
+    }
+
     /**
      * {@inheritdoc}
      */