--- /dev/null
+<?php
+
+namespace Drupal\Tests\views\FunctionalJavascript\Plugin\views\Handler;
+
+use Drupal\FunctionalJavascriptTests\JavascriptTestBase;
+use Drupal\views\Tests\ViewTestData;
+
+/**
+ * Tests the contextual filter handler UI.
+ *
+ * @group views
+ */
+class ContextualFilterTest extends JavascriptTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['node', 'views', 'views_ui', 'views_test_config'];
+
+ /**
+ * Views used by this test.
+ *
+ * @var array
+ */
+ public static $testViews = ['test_field_body'];
+
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ ViewTestData::createTestViews(get_class($this), ['views_test_config']);
+
+ // Disable automatic live preview to make the sequence of calls clearer.
+ \Drupal::configFactory()->getEditable('views.settings')->set('ui.show.advanced_column', TRUE)->save();
+
+ $account = $this->drupalCreateUser(['administer views']);
+ $this->drupalLogin($account);
+ }
+
+ /**
+ * Test adding a contextual filter handler through the UI.
+ */
+ public function testAddContextualFilterUI() {
+ $web_assert = $this->assertSession();
+
+ $this->drupalGet('/admin/structure/views/view/test_field_body');
+ $web_assert->assertWaitOnAjaxRequest();
+
+ $page = $this->getSession()->getPage();
+
+ $page->clickLink('views-add-argument');
+ $web_assert->assertWaitOnAjaxRequest();
+
+ $page->checkField('name[node_field_data.nid]');
+ $add_button = $page->find('css', '.ui-dialog-buttonset .button--primary');
+ $add_button->click();
+ $web_assert->assertWaitOnAjaxRequest();
+
+ $page->fillField('options[default_action]', 'default');
+ $page->selectFieldOption('options[default_argument_type]', 'node');
+ $add_button = $page->find('css', '.ui-dialog-buttonset .button--primary');
+ $add_button->click();
+ $web_assert->assertWaitOnAjaxRequest();
+ $page->pressButton('edit-actions-submit');
+ $web_assert->assertWaitOnAjaxRequest();
+ $page->clickLink('Content: ID');
+ // Check that the dialog opens.
+ $web_assert->assertWaitOnAjaxRequest();
+ $page->pressButton('Close');
+ }
+
+}