--- /dev/null
+<?php
+
+namespace Drupal\system\Tests\Installer;
+
+use Drupal\simpletest\InstallerTestBase;
+
+/**
+ * Tests the interactive installer.
+ *
+ * @group Installer
+ */
+class InstallerTest extends InstallerTestBase {
+
+ /**
+ * Ensures that the user page is available after installation.
+ */
+ public function testInstaller() {
+ $this->assertUrl('user/1');
+ $this->assertResponse(200);
+ // Confirm that we are logged-in after installation.
+ $this->assertText($this->rootUser->getUsername());
+
+ // Verify that the confirmation message appears.
+ require_once \Drupal::root() . '/core/includes/install.inc';
+ $this->assertRaw(t('Congratulations, you installed @drupal!', [
+ '@drupal' => drupal_install_profile_distribution_name(),
+ ]));
+ }
+
+ /**
+ * Installer step: Select language.
+ */
+ protected function setUpLanguage() {
+ // Test that \Drupal\Core\Render\BareHtmlPageRenderer adds assets and
+ // metatags as expected to the first page of the installer.
+ $this->assertRaw('core/themes/seven/css/components/buttons.css');
+ $this->assertRaw('<meta charset="utf-8" />');
+
+ // Assert that the expected title is present.
+ $this->assertEqual('Choose language', $this->cssSelect('main h2')[0]);
+
+ parent::setUpLanguage();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpProfile() {
+ // Assert that the expected title is present.
+ $this->assertEqual('Select an installation profile', $this->cssSelect('main h2')[0]);
+ $result = $this->xpath('//span[contains(@class, :class) and contains(text(), :text)]', [':class' => 'visually-hidden', ':text' => 'Select an installation profile']);
+ $this->assertEqual(count($result), 1, "Title/Label not displayed when '#title_display' => 'invisible' attribute is set");
+
+ parent::setUpProfile();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpSettings() {
+ // Assert that the expected title is present.
+ $this->assertEqual('Database configuration', $this->cssSelect('main h2')[0]);
+
+ parent::setUpSettings();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpSite() {
+ // Assert that the expected title is present.
+ $this->assertEqual('Configure site', $this->cssSelect('main h2')[0]);
+
+ parent::setUpSite();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function visitInstaller() {
+ parent::visitInstaller();
+
+ // Assert the title is correct and has the title suffix.
+ $this->assertTitle('Choose language | Drupal');
+ }
+
+}