Issue #2913809 by julien.sibi, Chi: Ouput drupal_region() function using region's Twig template.

src/TwigExtension.php

@@ -93,13 +93,11 @@ class TwigExtension extends \Twig_Extension {
    * @param string $theme
    *   (Optional) The name of the theme to load the region. If it is not
    *   provided then default theme will be used.
-   * @param bool $include_template
-   *   (Optional) Render the output using the region's Twig template.
    *
    * @return array
    *   A render array to display the region content.
    */
-  public function drupalRegion($region, $theme = NULL, $include_template = FALSE) {
+  public function drupalRegion($region, $theme = NULL) {
     $entity_type_manager = \Drupal::entityTypeManager();
     $blocks = $entity_type_manager->getStorage('block')->loadByProperties([
       'region' => $region,
@@ -124,7 +122,7 @@ class TwigExtension extends \Twig_Extension {
       }
     }
 
-    if ($include_template) {
+    if ($build) {
       $build['#region'] = $region;
       $build['#theme_wrappers'] = ['region'];
     }

tests/src/Functional/TwigTweakTest.php

@@ -75,7 +75,7 @@ class TwigTweakTest extends BrowserTestBase {
     $this->assertByXpath($xpath);
 
     // Test region.
-    $xpath = '//div[@class = "tt-region"]';
+    $xpath = '//div[@class = "tt-region"]/div[@class = "region region-sidebar-first"]';
     $xpath .= '/div[contains(@class, "block-page-title-block") and h1[@class="page-title" and text() = "Log in"]]';
     $xpath .= '/following-sibling::div[@class="messages messages--warning" and contains(., "Hi!")]';
     $xpath .= '/following-sibling::div[contains(@class, "block-system-powered-by-block")]/span[. = "Powered by Drupal"]';