--- /dev/null
+<?php
+
+namespace Drupal\Tests\taxonomy\Functional;
+
+use Drupal\Core\Field\FieldStorageDefinitionInterface;
+use Drupal\views\Views;
+
+/**
+ * Ensure that data added as terms appears in RSS feeds if "RSS Category" format
+ * is selected.
+ *
+ * @group taxonomy
+ */
+class RssTest extends TaxonomyTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['node', 'field_ui', 'views'];
+
+ /**
+ * Vocabulary for testing.
+ *
+ * @var \Drupal\taxonomy\VocabularyInterface
+ */
+ protected $vocabulary;
+
+ /**
+ * Name of the taxonomy term reference field.
+ *
+ * @var string
+ */
+ protected $fieldName;
+
+ protected function setUp() {
+ parent::setUp();
+
+ $this->drupalLogin($this->drupalCreateUser(['administer taxonomy', 'bypass node access', 'administer content types', 'administer node display']));
+ $this->vocabulary = $this->createVocabulary();
+ $this->fieldName = 'taxonomy_' . $this->vocabulary->id();
+
+ $handler_settings = [
+ 'target_bundles' => [
+ $this->vocabulary->id() => $this->vocabulary->id(),
+ ],
+ 'auto_create' => TRUE,
+ ];
+ $this->createEntityReferenceField('node', 'article', $this->fieldName, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
+
+ entity_get_form_display('node', 'article', 'default')
+ ->setComponent($this->fieldName, [
+ 'type' => 'options_select',
+ ])
+ ->save();
+ entity_get_display('node', 'article', 'default')
+ ->setComponent($this->fieldName, [
+ 'type' => 'entity_reference_label',
+ ])
+ ->save();
+ }
+
+ /**
+ * Tests that terms added to nodes are displayed in core RSS feed.
+ *
+ * Create a node and assert that taxonomy terms appear in rss.xml.
+ */
+ public function testTaxonomyRss() {
+ // Create two taxonomy terms.
+ $term1 = $this->createTerm($this->vocabulary);
+
+ // RSS display must be added manually.
+ $this->drupalGet("admin/structure/types/manage/article/display");
+ $edit = [
+ "display_modes_custom[rss]" => '1',
+ ];
+ $this->drupalPostForm(NULL, $edit, t('Save'));
+
+ // Change the format to 'RSS category'.
+ $this->drupalGet("admin/structure/types/manage/article/display/rss");
+ $edit = [
+ "fields[taxonomy_" . $this->vocabulary->id() . "][type]" => 'entity_reference_rss_category',
+ "fields[taxonomy_" . $this->vocabulary->id() . "][region]" => 'content',
+ ];
+ $this->drupalPostForm(NULL, $edit, t('Save'));
+
+ // Post an article.
+ $edit = [];
+ $edit['title[0][value]'] = $this->randomMachineName();
+ $edit[$this->fieldName . '[]'] = $term1->id();
+ $this->drupalPostForm('node/add/article', $edit, t('Save'));
+
+ // Check that the term is displayed when the RSS feed is viewed.
+ $this->drupalGet('rss.xml');
+ $test_element = sprintf(
+ '<category %s>%s</category>',
+ 'domain="' . $term1->url('canonical', ['absolute' => TRUE]) . '"',
+ $term1->getName()
+ );
+ $this->assertRaw($test_element, 'Term is displayed when viewing the rss feed.');
+
+ // Test that the feed icon exists for the term.
+ $this->drupalGet("taxonomy/term/{$term1->id()}");
+ $this->assertLinkByHref("taxonomy/term/{$term1->id()}/feed");
+
+ // Test that the feed page exists for the term.
+ $this->drupalGet("taxonomy/term/{$term1->id()}/feed");
+ $assert = $this->assertSession();
+ $assert->responseHeaderContains('Content-Type', 'application/rss+xml');
+ // Ensure the RSS version is 2.0.
+ $rss_array = $this->getSession()->getDriver()->find('rss');
+ $this->assertEquals('2.0', reset($rss_array)->getAttribute('version'));
+
+ // Check that the "Exception value" is disabled by default.
+ $this->drupalGet('taxonomy/term/all/feed');
+ $this->assertResponse(404);
+ // Set the exception value to 'all'.
+ $view = Views::getView('taxonomy_term');
+ $arguments = $view->getDisplay()->getOption('arguments');
+ $arguments['tid']['exception']['value'] = 'all';
+ $view->getDisplay()->overrideOption('arguments', $arguments);
+ $view->storage->save();
+ // Check the article is shown in the feed.
+ $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
+ $raw_xml = '<title>' . $node->label() . '</title>';
+ $this->drupalGet('taxonomy/term/all/feed');
+ $this->assertRaw($raw_xml, "Raw text '$raw_xml' is found.");
+ // Unpublish the article and check that it is not shown in the feed.
+ $node->setUnpublished()->save();
+ $this->drupalGet('taxonomy/term/all/feed');
+ $this->assertNoRaw($raw_xml);
+ }
+
+}