--- /dev/null
+<?php
+
+namespace Drupal\Tests\taxonomy\Kernel\Views;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\views\Views;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
+
+/**
+ * Tests the representative node relationship for terms.
+ *
+ * @group taxonomy
+ */
+class TaxonomyDefaultArgumentTest extends TaxonomyTestBase {
+
+ /**
+ * Views used by this test.
+ *
+ * @var array
+ */
+ public static $testViews = ['taxonomy_default_argument_test'];
+
+ /**
+ * Init view with a request by provided url.
+ *
+ * @param string $request_url
+ * The requested url.
+ * @param string $view_name
+ * The name of the view.
+ *
+ * @return \Drupal\views\ViewExecutable
+ * The initiated view.
+ *
+ * @throws \Exception
+ */
+ protected function initViewWithRequest($request_url, $view_name = 'taxonomy_default_argument_test') {
+ $view = Views::getView($view_name);
+
+ $request = Request::create($request_url);
+ $request->server->set('SCRIPT_NAME', $GLOBALS['base_path'] . 'index.php');
+ $request->server->set('SCRIPT_FILENAME', 'index.php');
+
+ $response = $this->container->get('http_kernel')
+ ->handle($request, HttpKernelInterface::SUB_REQUEST);
+
+ $view->setRequest($request);
+ $view->setResponse($response);
+ $view->initHandlers();
+
+ return $view;
+ }
+
+ /**
+ * Tests the relationship.
+ */
+ public function testNodePath() {
+ $view = $this->initViewWithRequest($this->nodes[0]->url());
+
+ $expected = implode(',', [$this->term1->id(), $this->term2->id()]);
+ $this->assertEqual($expected, $view->argument['tid']->getDefaultArgument());
+ $view->destroy();
+ }
+
+ public function testNodePathWithViewSelection() {
+ // Change the term entity reference field to use a view as selection plugin.
+ \Drupal::service('module_installer')->install(['entity_reference_test']);
+
+ $field_name = 'field_' . $this->vocabulary->id();
+ $field = FieldConfig::loadByName('node', 'article', $field_name);
+ $field->setSetting('handler', 'views');
+ $field->setSetting('handler_settings', [
+ 'view' => [
+ 'view_name' => 'test_entity_reference',
+ 'display_name' => 'entity_reference_1',
+ ],
+ ]);
+ $field->save();
+
+ $view = $this->initViewWithRequest($this->nodes[0]->url());
+
+ $expected = implode(',', [$this->term1->id(), $this->term2->id()]);
+ $this->assertEqual($expected, $view->argument['tid']->getDefaultArgument());
+ }
+
+ public function testTermPath() {
+ $view = $this->initViewWithRequest($this->term1->url());
+
+ $expected = $this->term1->id();
+ $this->assertEqual($expected, $view->argument['tid']->getDefaultArgument());
+ }
+
+}