Issue #3150474 by jungle, munish.kumar: Inaccurate return type of \Drupal\views\Views::getView()

(cherry picked from commit 19d2c39d)

core/modules/views/src/Views.php

@@ -115,14 +115,15 @@ public static function handlerManager($type) {
    * @param string $id
    *   The view ID to load.
    *
-   * @return \Drupal\views\ViewExecutable
-   *   A view executable instance, from the loaded entity.
+   * @return \Drupal\views\ViewExecutable|null
+   *   A view executable instance or NULL if the view does not exist.
    */
   public static function getView($id) {
     $view = \Drupal::entityTypeManager()->getStorage('view')->load($id);
     if ($view) {
       return static::executableFactory()->get($view);
     }
+    return NULL;
   }
 
   /**

core/modules/views/tests/src/Unit/ViewsTest.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\views\Unit;
 
+use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Tests\UnitTestCase;
 use Drupal\views\Views;
@@ -72,6 +73,21 @@ public function testGetView() {
     $this->assertEquals(spl_object_hash($view), spl_object_hash($executable->storage));
   }
 
+  /**
+   * Tests the getView() method against a non-existent view.
+   *
+   * @covers ::getView
+   */
+  public function testGetNonExistentView() {
+    $entity_type_manager = $this->prophesize(EntityTypeManagerInterface::class);
+    $storage = $this->prophesize(EntityStorageInterface::class);
+    $storage->load('test_view_non_existent')->willReturn(NULL);
+    $entity_type_manager->getStorage('view')->willReturn($storage->reveal());
+    $this->container->set('entity_type.manager', $entity_type_manager->reveal());
+    $executable_does_not_exist = Views::getView('test_view_non_existent');
+    $this->assertNull($executable_does_not_exist);
+  }
+
   /**
    * @covers ::getApplicableViews
    *