EWPP-3180: Fix failed tests related to changes in language switcher s…

…ervices.

tests/src/Kernel/MultilingualAbstractKernelTestBase.php

@@ -4,7 +4,10 @@
 
 namespace Drupal\Tests\oe_theme\Kernel;
 
+use Drupal\Core\Routing\RouteObjectInterface;
 use Drupal\locale\SourceString;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Route;
 
 /**
  * Base class for multilingual tests.
@@ -56,6 +59,13 @@ protected function setUp(): void {
     $this->container->get('module_handler')->loadInclude('oe_multilingual', 'install');
     oe_multilingual_install(FALSE);
 
+    // In order to make it possible correctly render the language switcher block
+    // we have to provide the current route explicitly.
+    $request = Request::create('/');
+    $request->attributes->set(RouteObjectInterface::ROUTE_NAME, '<front>');
+    $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, new Route('/'));
+    $this->container->get('request_stack')->push($request);
+
     // Rebuild the container in order to make sure tests pass.
     // @todo fix test setup so that we can get rid of this line.
     $this->container->get('kernel')->rebuildContainer();