--- /dev/null
+<?php
+
+namespace Drupal\FunctionalTests\Installer;
+
+/**
+ * Tests translation files for multiple languages get imported during install.
+ *
+ * @group Installer
+ */
+class InstallerTranslationMultipleLanguageTest extends InstallerTestBase {
+
+ /**
+ * Switch to the multilingual testing profile.
+ *
+ * @var string
+ */
+ protected $profile = 'testing_multilingual';
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpLanguage() {
+ // Place custom local translations in the translations directory.
+ mkdir(DRUPAL_ROOT . '/' . $this->siteDirectory . '/files/translations', 0777, TRUE);
+ file_put_contents(DRUPAL_ROOT . '/' . $this->siteDirectory . '/files/translations/drupal-8.0.0.de.po', $this->getPo('de'));
+ file_put_contents(DRUPAL_ROOT . '/' . $this->siteDirectory . '/files/translations/drupal-8.0.0.es.po', $this->getPo('es'));
+
+ parent::setUpLanguage();
+ }
+
+ /**
+ * Returns the string for the test .po file.
+ *
+ * @param string $langcode
+ * The language code.
+ * @return string
+ * Contents for the test .po file.
+ */
+ protected function getPo($langcode) {
+ return <<<ENDPO
+msgid ""
+msgstr ""
+
+msgid "Save and continue"
+msgstr "Save and continue $langcode"
+
+msgid "Anonymous"
+msgstr "Anonymous $langcode"
+
+msgid "Language"
+msgstr "Language $langcode"
+
+#: Testing site name configuration during the installer.
+msgid "Drupal"
+msgstr "Drupal"
+ENDPO;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function installParameters() {
+ $params = parent::installParameters();
+ $params['forms']['install_configure_form']['site_name'] = 'SITE_NAME_' . $this->langcode;
+ return $params;
+ }
+
+ /**
+ * Tests that translations ended up at the expected places.
+ */
+ public function testTranslationsLoaded() {
+ // Ensure the title is correct.
+ $this->assertEqual('SITE_NAME_' . $this->langcode, \Drupal::config('system.site')->get('name'));
+
+ // Verify German and Spanish were configured.
+ $this->drupalGet('admin/config/regional/language');
+ $this->assertText('German');
+ $this->assertText('Spanish');
+ // If the installer was English or we used a profile that keeps English, we
+ // expect that configured also. Otherwise English should not be configured
+ // on the site.
+ if ($this->langcode == 'en' || $this->profile == 'testing_multilingual_with_english') {
+ $this->assertText('English');
+ }
+ else {
+ $this->assertNoText('English');
+ }
+
+ // Verify the strings from the translation files were imported.
+ $this->verifyImportedStringsTranslated();
+
+ /** @var \Drupal\language\ConfigurableLanguageManager $language_manager */
+ $language_manager = \Drupal::languageManager();
+
+ // If the site was installed in a foreign language (only tested with German
+ // in subclasses), then the active configuration should be updated and no
+ // override should exist in German. Otherwise the German translation should
+ // end up in overrides the same way as Spanish (which is not used as a site
+ // installation language). English should be available based on profile
+ // information and should be possible to add if not yet added, making
+ // English overrides available.
+
+ $config = \Drupal::config('user.settings');
+ $override_de = $language_manager->getLanguageConfigOverride('de', 'user.settings');
+ $override_en = $language_manager->getLanguageConfigOverride('en', 'user.settings');
+ $override_es = $language_manager->getLanguageConfigOverride('es', 'user.settings');
+
+ if ($this->langcode == 'de') {
+ // Active configuration should be in German and no German override should
+ // exist.
+ $this->assertEqual($config->get('anonymous'), 'Anonymous de');
+ $this->assertEqual($config->get('langcode'), 'de');
+ $this->assertTrue($override_de->isNew());
+
+ if ($this->profile == 'testing_multilingual_with_english') {
+ // English is already added in this profile. Should make the override
+ // available.
+ $this->assertEqual($override_en->get('anonymous'), 'Anonymous');
+ }
+ else {
+ // English is not yet available.
+ $this->assertTrue($override_en->isNew());
+
+ // Adding English should make the English override available.
+ $edit = ['predefined_langcode' => 'en'];
+ $this->drupalPostForm('admin/config/regional/language/add', $edit, t('Add language'));
+ $override_en = $language_manager->getLanguageConfigOverride('en', 'user.settings');
+ $this->assertEqual($override_en->get('anonymous'), 'Anonymous');
+ }
+
+ // Activate a module, to make sure that config is not overridden by module
+ // installation.
+ $edit = [
+ 'modules[views][enable]' => TRUE,
+ 'modules[filter][enable]' => TRUE,
+ ];
+ $this->drupalPostForm('admin/modules', $edit, t('Install'));
+
+ // Verify the strings from the translation are still as expected.
+ $this->verifyImportedStringsTranslated();
+ }
+ else {
+ // Active configuration should be English.
+ $this->assertEqual($config->get('anonymous'), 'Anonymous');
+ $this->assertEqual($config->get('langcode'), 'en');
+ // There should not be an English override.
+ $this->assertTrue($override_en->isNew());
+ // German should be an override.
+ $this->assertEqual($override_de->get('anonymous'), 'Anonymous de');
+ }
+
+ // Spanish is always an override (never used as installation language).
+ $this->assertEqual($override_es->get('anonymous'), 'Anonymous es');
+
+ }
+
+ /**
+ * Helper function to verify that the expected strings are translated.
+ */
+ protected function verifyImportedStringsTranslated() {
+ $test_samples = ['Save and continue', 'Anonymous', 'Language'];
+ $langcodes = ['de', 'es'];
+
+ foreach ($test_samples as $sample) {
+ foreach ($langcodes as $langcode) {
+ $edit = [];
+ $edit['langcode'] = $langcode;
+ $edit['translation'] = 'translated';
+ $edit['string'] = $sample;
+ $this->drupalPostForm('admin/config/regional/translate', $edit, t('Filter'));
+ $this->assertText($sample . ' ' . $langcode);
+ }
+ }
+ }
+
+}