Issue #3041743 by claudiu.cristea: Convert ViewsTemplateTest into a Kernel test

(cherry picked from commit b5f683dc)

core/modules/views/tests/src/Functional/ViewsTemplateTest.php → core/modules/views/tests/src/Kernel/ViewsTemplateTest.php

 <?php
 
-namespace Drupal\Tests\views\Functional;
+namespace Drupal\Tests\views\Kernel;
 
-use Drupal\views\Tests\ViewTestData;
 use Drupal\views\Views;
 
 /**
  * Tests the template retrieval of views.
  *
  * @group views
+ *
  * @see \Drupal\views_test_data\Plugin\views\style\StyleTemplateTest
  */
-class ViewsTemplateTest extends ViewTestBase {
+class ViewsTemplateTest extends ViewsKernelTestBase {
 
   /**
-   * Views used by this test.
-   *
-   * @var array
+   * {@inheritdic}
    */
   public static $testViews = ['test_view_display_template'];
 
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp($import_test_views = TRUE) {
-    parent::setUp(FALSE);
-
-    $this->enableViewsTestModule();
-    ViewTestData::createTestViews(get_class($this), ['views_test_config']);
-  }
-
   /**
    * Tests render functionality.
    */
   public function testTemplate() {
-
     // Make sure that the rendering just calls the preprocess function once.
-    $view = Views::getView('test_view_display_template');
-    $output = $view->preview();
-
-    // Check if we got the rendered output of our template file.
-    $this->assertTrue(strpos(\Drupal::service('renderer')->renderRoot($output), 'This module defines its own display template.') !== FALSE, 'Display plugin DisplayTemplateTest defines its own template.');
+    $output = Views::getView('test_view_display_template')->preview();
+    $renderer = $this->container->get('renderer');
 
+    // Check that the renderd output uses the correct template file.
+    $this->assertContains('This module defines its own display template.', (string) $renderer->renderRoot($output));
   }
 
 }