class NidArgumentTest

class NidArgumentTest extends ViewsKernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'node',
    'field',
    'text',
    'node_test_config',
    'user',
    'node_test_views',
  ];
  
  /**
   * Views used by this test.
   *
   * @var array
   */
  public static $testViews = [
    'test_nid_argument',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp($import_test_views = TRUE) : void {
    parent::setUp($import_test_views);
    $this->installEntitySchema('node');
    $this->installEntitySchema('user');
    $this->installConfig([
      'node',
      'field',
    ]);
    ViewTestData::createTestViews(static::class, [
      'node_test_views',
    ]);
  }
  
  /**
   * Tests the nid argument.
   */
  public function testNidArgument() {
    $view = Views::getView('test_nid_argument');
    $view->setDisplay();
    $node1 = Node::create([
      'type' => 'default',
      'title' => $this->randomMachineName(),
    ]);
    $node1->save();
    $node2 = Node::create([
      'type' => 'default',
      'title' => $this->randomMachineName(),
    ]);
    $node2->save();
    $view->preview();
    $this->assertCount(2, $view->result, 'Found the expected number of results.');
    // Set the second node id as an argument.
    $view->destroy();
    $view->preview('default', [
      $node2->id(),
    ]);
    // Verify that the title is overridden.
    $this->assertEquals($node2->getTitle(), $view->getTitle());
    // Verify that the argument filtering works.
    $this->assertCount(1, $view->result, 'Found the expected number of results.');
    $this->assertEquals($node2->id(), (string) $view->style_plugin
      ->getField(0, 'nid'), 'Found the correct nid.');
    // Verify that setting a non-existing id as argument results in no nodes
    // being shown.
    $view->destroy();
    $view->preview('default', [
      22,
    ]);
    $this->assertCount(0, $view->result, 'Found the expected number of results.');
  }

}