--- /dev/null
+<?php
+
+namespace Drupal\Tests\views_ui\Functional;
+
+use Drupal\Tests\views\Functional\ViewTestBase;
+
+/**
+ * Provides a base class for testing the Views UI.
+ */
+abstract class UITestBase extends ViewTestBase {
+
+ /**
+ * An admin user with the 'administer views' permission.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $adminUser;
+
+ /**
+ * An admin user with administrative permissions for views, blocks, and nodes.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $fullAdminUser;
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['node', 'views_ui', 'block', 'taxonomy'];
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp($import_test_views = TRUE) {
+ parent::setUp($import_test_views);
+
+ $this->enableViewsTestModule();
+
+ $this->adminUser = $this->drupalCreateUser(['administer views']);
+
+ $this->fullAdminUser = $this->drupalCreateUser(['administer views',
+ 'administer blocks',
+ 'bypass node access',
+ 'access user profiles',
+ 'view all revisions',
+ 'administer permissions',
+ ]);
+ $this->drupalLogin($this->fullAdminUser);
+ }
+
+ /**
+ * A helper method which creates a random view.
+ */
+ public function randomView(array $view = []) {
+ // Create a new view in the UI.
+ $default = [];
+ $default['label'] = $this->randomMachineName(16);
+ $default['id'] = strtolower($this->randomMachineName(16));
+ $default['description'] = $this->randomMachineName(16);
+ $default['page[create]'] = TRUE;
+ $default['page[path]'] = $default['id'];
+
+ $view += $default;
+
+ $this->drupalPostForm('admin/structure/views/add', $view, t('Save and edit'));
+
+ return $default;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function drupalGet($path, array $options = [], array $headers = []) {
+ $url = $this->buildUrl($path, $options);
+
+ // Ensure that each nojs page is accessible via ajax as well.
+ if (strpos($url, 'nojs') !== FALSE) {
+ $url = str_replace('nojs', 'ajax', $url);
+ $result = $this->drupalGet($url, $options);
+ $this->assertSession()->statusCodeEquals(200);
+ $this->assertEquals('application/json', $this->getSession()->getResponseHeader('Content-Type'));
+ $this->assertTrue(json_decode($result), 'Ensure that the AJAX request returned valid content.');
+ }
+
+ return parent::drupalGet($path, $options, $headers);
+ }
+
+}