--- /dev/null
+<?php
+
+namespace Drupal\Tests\language\Functional;
+
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * @coversDefaultClass \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl
+ * @group language
+ */
+class LanguageNegotiationUrlTest extends BrowserTestBase {
+
+ use StringTranslationTrait;
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = [
+ 'language',
+ 'node',
+ 'path',
+ ];
+
+ /**
+ * @var \Drupal\user\Entity\User
+ */
+ protected $user;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ // Create an Article node type.
+ if ($this->profile != 'standard') {
+ $this->drupalCreateContentType(['type' => 'article']);
+ }
+
+ $this->user = $this->drupalCreateUser([
+ 'administer languages',
+ 'access administration pages',
+ 'view the administration theme',
+ 'administer nodes',
+ 'create article content',
+ 'create url aliases',
+ ]);
+ $this->drupalLogin($this->user);
+
+ $this->drupalPostForm('admin/config/regional/language/add', ['predefined_langcode' => 'de'], $this->t('Add language'));
+ }
+
+ /**
+ * @covers ::processInbound
+ */
+ public function testDomain() {
+ // Check if paths that contain language prefixes can be reached when
+ // language is taken from the domain.
+ $edit = [
+ 'language_negotiation_url_part' => 'domain',
+ 'prefix[en]' => 'eng',
+ 'prefix[de]' => 'de',
+ 'domain[en]' => $_SERVER['HTTP_HOST'],
+ 'domain[de]' => "de.$_SERVER[HTTP_HOST]",
+ ];
+ $this->drupalPostForm('admin/config/regional/language/detection/url', $edit, $this->t('Save configuration'));
+
+ $nodeValues = [
+ 'title[0][value]' => 'Test',
+ 'path[0][alias]' => '/eng/test',
+ ];
+ $this->drupalPostForm('node/add/article', $nodeValues, $this->t('Save and publish'));
+ $this->assertSession()->statusCodeEquals(200);
+ }
+
+}