Issue #3414499 by Spokje, smustgrave: Convert NodeTemplateSuggestionsTest into a Kernel test

<?php

namespace Drupal\Tests\node\Functional;

namespace Drupal\Tests\node\Kernel;

use Drupal\KernelTests\KernelTestBase;

use Drupal\node\Entity\NodeType;

use Drupal\Tests\node\Traits\NodeCreationTrait;

/**

 * Tests node template suggestions.

 *

 * @group node

 */

class NodeTemplateSuggestionsTest extends NodeTestBase {

class NodeTemplateSuggestionsTest extends KernelTestBase {

  use NodeCreationTrait;

  /**

   * {@inheritdoc}

   * Modules to enable.

   *

   * @var array

   */

  protected $defaultTheme = 'stark';

  protected static $modules = [

    'node',

    'user',

    'system',

  ];

  /**

   * Tests if template_preprocess_node() generates the correct suggestions.

   */

  public function testNodeThemeHookSuggestions() {

  public function testNodeThemeHookSuggestions(): void {

    $this->installEntitySchema('user');

    $this->installEntitySchema('node');

    $this->installConfig(['system']);

    NodeType::create([

      'type' => 'page',

      'name' => 'Page',

    ])->save();

    // Create node to be rendered.

    $node = $this->drupalCreateNode();

    $node = $this->createNode();

    $view_mode = 'full';

    // Simulate theming of the node.