From 20faabff8cb6477ca762d4b60f8d32d81ae3b8a0 Mon Sep 17 00:00:00 2001
From: effulgentsia <alex.bronstein@acquia.com>
Date: Wed, 9 Oct 2019 16:29:39 -0700
Subject: [PATCH] Issue #3084069 by Wim Leers, kamalzairig, zrpnr, tinko,
webchick, lauriii, tedbow, ckrina: Allow marking themes as experimental
---
.../src/Controller/SystemController.php | 9 +-
.../system/src/Controller/ThemeController.php | 57 +++++-
.../src/Form/ThemeExperimentalConfirmForm.php | 189 ++++++++++++++++++
core/modules/system/system.install | 25 ++-
.../Theme/ExperimentalThemeTest.php | 128 ++++++++++++
...xperimental_theme_dependency_test.info.yml | 6 +
.../experimental_theme_test.info.yml | 7 +
7 files changed, 409 insertions(+), 12 deletions(-)
create mode 100644 core/modules/system/src/Form/ThemeExperimentalConfirmForm.php
create mode 100644 core/modules/system/tests/src/Functional/Theme/ExperimentalThemeTest.php
create mode 100644 core/modules/system/tests/themes/experimental_theme_dependency_test/experimental_theme_dependency_test.info.yml
create mode 100644 core/modules/system/tests/themes/experimental_theme_test/experimental_theme_test.info.yml
diff --git a/core/modules/system/src/Controller/SystemController.php b/core/modules/system/src/Controller/SystemController.php
index b0c3ccc25642..f27cc01eb111 100644
--- a/core/modules/system/src/Controller/SystemController.php
+++ b/core/modules/system/src/Controller/SystemController.php
@@ -197,6 +197,7 @@ public function themesPage() {
}
$theme->is_default = ($theme->getName() == $theme_default);
$theme->is_admin = ($theme->getName() == $admin_theme || ($theme->is_default && empty($admin_theme)));
+ $theme->is_experimental = isset($theme->info['experimental']) && $theme->info['experimental'];
// Identify theme screenshot.
$theme->screenshot = NULL;
@@ -269,7 +270,7 @@ public function themesPage() {
'attributes' => ['title' => $this->t('Set @theme as default theme', ['@theme' => $theme->info['name']])],
];
}
- $admin_theme_options[$theme->getName()] = $theme->info['name'];
+ $admin_theme_options[$theme->getName()] = $theme->info['name'] . ($theme->is_experimental ? ' (' . t('Experimental') . ')' : '');
}
else {
$theme->operations[] = [
@@ -287,7 +288,8 @@ public function themesPage() {
}
}
- // Add notes to default and administration theme.
+ // Add notes to default theme, administration theme and experimental
+ // themes.
$theme->notes = [];
if ($theme->is_default) {
$theme->notes[] = $this->t('default theme');
@@ -295,6 +297,9 @@ public function themesPage() {
if ($theme->is_admin) {
$theme->notes[] = $this->t('administration theme');
}
+ if ($theme->is_experimental) {
+ $theme->notes[] = $this->t('experimental theme');
+ }
// Sort installed and uninstalled themes into their own groups.
$theme_groups[$theme->status ? 'installed' : 'uninstalled'][] = $theme;
diff --git a/core/modules/system/src/Controller/ThemeController.php b/core/modules/system/src/Controller/ThemeController.php
index 3a77a59512de..0a8ad31cf81b 100644
--- a/core/modules/system/src/Controller/ThemeController.php
+++ b/core/modules/system/src/Controller/ThemeController.php
@@ -6,8 +6,10 @@
use Drupal\Core\Config\PreExistingConfigException;
use Drupal\Core\Config\UnmetDependenciesException;
use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Extension\ThemeExtensionList;
use Drupal\Core\Extension\ThemeHandlerInterface;
use Drupal\Core\Extension\ThemeInstallerInterface;
+use Drupal\system\Form\ThemeExperimentalConfirmForm;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
@@ -24,6 +26,13 @@ class ThemeController extends ControllerBase {
*/
protected $themeHandler;
+ /**
+ * An extension discovery instance.
+ *
+ * @var \Drupal\Core\Extension\ThemeExtensionList
+ */
+ protected $themeList;
+
/**
* The theme installer service.
*
@@ -36,13 +45,16 @@ class ThemeController extends ControllerBase {
*
* @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
* The theme handler.
+ * @param \Drupal\Core\Extension\ThemeExtensionList $theme_list
+ * The theme extension list.
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The config factory.
* @param \Drupal\Core\Extension\ThemeInstallerInterface $theme_installer
* The theme installer.
*/
- public function __construct(ThemeHandlerInterface $theme_handler, ConfigFactoryInterface $config_factory, ThemeInstallerInterface $theme_installer) {
+ public function __construct(ThemeHandlerInterface $theme_handler, ThemeExtensionList $theme_list, ConfigFactoryInterface $config_factory, ThemeInstallerInterface $theme_installer) {
$this->themeHandler = $theme_handler;
+ $this->themeList = $theme_list;
$this->configFactory = $config_factory;
$this->themeInstaller = $theme_installer;
}
@@ -53,6 +65,7 @@ public function __construct(ThemeHandlerInterface $theme_handler, ConfigFactoryI
public static function create(ContainerInterface $container) {
return new static(
$container->get('theme_handler'),
+ $container->get('extension.list.theme'),
$container->get('config.factory'),
$container->get('theme_installer')
);
@@ -106,8 +119,9 @@ public function uninstall(Request $request) {
* @param \Symfony\Component\HttpFoundation\Request $request
* A request object containing a theme name and a valid token.
*
- * @return \Symfony\Component\HttpFoundation\RedirectResponse
- * Redirects back to the appearance admin page.
+ * @return \Symfony\Component\HttpFoundation\RedirectResponse|array
+ * Redirects back to the appearance admin page or the confirmation form
+ * if an experimental theme will be installed.
*
* @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
* Throws access denied when no theme or token is set in the request or when
@@ -117,6 +131,11 @@ public function install(Request $request) {
$theme = $request->query->get('theme');
if (isset($theme)) {
+ // Display confirmation form in case of experimental theme.
+ if ($this->willInstallExperimentalTheme($theme)) {
+ return $this->formBuilder()->getForm(ThemeExperimentalConfirmForm::class, $theme);
+ }
+
try {
if ($this->themeInstaller->install([$theme])) {
$themes = $this->themeHandler->listInfo();
@@ -149,14 +168,38 @@ public function install(Request $request) {
throw new AccessDeniedHttpException();
}
+ /**
+ * Checks if the given theme requires the installation of experimental themes.
+ *
+ * @param string $theme
+ * The name of the theme to check.
+ *
+ * @return bool
+ * Whether experimental themes will be installed.
+ */
+ protected function willInstallExperimentalTheme($theme) {
+ $all_themes = $this->themeList->getList();
+ $dependencies = array_keys($all_themes[$theme]->requires);
+ $themes_to_enable = array_merge([$theme], $dependencies);
+
+ foreach ($themes_to_enable as $name) {
+ if (!empty($all_themes[$name]->info['experimental']) && $all_themes[$name]->status === 0) {
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+ }
+
/**
* Set the default theme.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* A request object containing a theme name.
*
- * @return \Symfony\Component\HttpFoundation\RedirectResponse
- * Redirects back to the appearance admin page.
+ * @return \Symfony\Component\HttpFoundation\RedirectResponse|array
+ * Redirects back to the appearance admin page or the confirmation form
+ * if an experimental theme will be installed.
*
* @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
* Throws access denied when no theme is set in the request.
@@ -168,6 +211,10 @@ public function setDefaultTheme(Request $request) {
if (isset($theme)) {
// Get current list of themes.
$themes = $this->themeHandler->listInfo();
+ // Display confirmation form if an experimental theme is being installed.
+ if ($this->willInstallExperimentalTheme($theme)) {
+ return $this->formBuilder()->getForm(ThemeExperimentalConfirmForm::class, $theme, TRUE);
+ }
// Check if the specified theme is one recognized by the system.
// Or try to install the theme.
diff --git a/core/modules/system/src/Form/ThemeExperimentalConfirmForm.php b/core/modules/system/src/Form/ThemeExperimentalConfirmForm.php
new file mode 100644
index 000000000000..d83cd422ef9b
--- /dev/null
+++ b/core/modules/system/src/Form/ThemeExperimentalConfirmForm.php
@@ -0,0 +1,189 @@
+<?php
+
+namespace Drupal\system\Form;
+
+use Drupal\Core\Config\PreExistingConfigException;
+use Drupal\Core\Config\UnmetDependenciesException;
+use Drupal\Core\Extension\ThemeExtensionList;
+use Drupal\Core\Extension\ThemeInstallerInterface;
+use Drupal\Core\Form\ConfirmFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Builds a confirmation form for enabling experimental themes.
+ *
+ * @internal
+ */
+class ThemeExperimentalConfirmForm extends ConfirmFormBase {
+
+ /**
+ * An extension discovery instance.
+ *
+ * @var \Drupal\Core\Extension\ThemeExtensionList
+ */
+ protected $themeList;
+
+ /**
+ * The theme installer service.
+ *
+ * @var \Drupal\Core\Extension\ThemeInstallerInterface
+ */
+ protected $themeInstaller;
+
+ /**
+ * Constructs a ThemeExperimentalConfirmForm object.
+ *
+ * @param \Drupal\Core\Extension\ThemeExtensionList $theme_list
+ * The theme extension list.
+ * @param \Drupal\Core\Extension\ThemeInstallerInterface $theme_installer
+ * The theme installer.
+ */
+ public function __construct(ThemeExtensionList $theme_list, ThemeInstallerInterface $theme_installer) {
+ $this->themeList = $theme_list;
+ $this->themeInstaller = $theme_installer;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('extension.list.theme'),
+ $container->get('theme_installer')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getQuestion() {
+ return $this->t('Are you sure you wish to install an experimental theme?');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getCancelUrl() {
+ return new Url('system.themes_page');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfirmText() {
+ return $this->t('Continue');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDescription() {
+ return $this->t('Would you like to continue with the above?');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'system_themes_experimental_confirm_form';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ $theme = $form_state->getBuildInfo()['args'][0] ? $form_state->getBuildInfo()['args'][0] : NULL;
+ $all_themes = $this->themeList->getList();
+ if (!isset($all_themes[$theme])) {
+ return $this->redirect('system.themes_page');
+ }
+ $this->messenger()->addWarning($this->t('Experimental themes are provided for testing purposes only. Use at your own risk.'));
+
+ $dependencies = array_keys($all_themes[$theme]->requires);
+ $themes = array_merge([$theme], $dependencies);
+ $is_experimental = function ($theme) use ($all_themes) {
+ return isset($all_themes[$theme]) && isset($all_themes[$theme]->info['experimental']) && $all_themes[$theme]->info['experimental'];
+ };
+ $get_label = function ($theme) use ($all_themes) {
+ return $all_themes[$theme]->info['name'];
+ };
+
+ $items = [];
+ if (!empty($dependencies)) {
+ // Display a list of required themes that have to be installed as well.
+ $items[] = $this->formatPlural(count($dependencies), 'You must enable the @required theme to install @theme.', 'You must enable the @required themes to install @theme.', [
+ '@theme' => $get_label($theme),
+ // It is safe to implode this because theme names are not translated
+ // markup and so will not be double-escaped.
+ '@required' => implode(', ', array_map($get_label, $dependencies)),
+ ]);
+ }
+ // Add the list of experimental themes after any other messages.
+ $items[] = $this->t('The following themes are experimental: @themes', ['@themes' => implode(', ', array_map($get_label, array_filter($themes, $is_experimental)))]);
+ $form['message'] = [
+ '#theme' => 'item_list',
+ '#items' => $items,
+ ];
+ return parent::buildForm($form, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ $args = $form_state->getBuildInfo()['args'];
+ $theme = isset($args[0]) ? $args[0] : NULL;
+ $set_default = isset($args[1]) ? $args[1] : FALSE;
+ $themes = $this->themeList->getList();
+ $config = $this->configFactory()->getEditable('system.theme');
+ try {
+ if ($this->themeInstaller->install([$theme])) {
+ if ($set_default) {
+ // Set the default theme.
+ $config->set('default', $theme)->save();
+
+ // The status message depends on whether an admin theme is currently
+ // in use: an empty string means the admin theme is set to be the
+ // default theme.
+ $admin_theme = $config->get('admin');
+ if (!empty($admin_theme) && $admin_theme !== $theme) {
+ $this->messenger()
+ ->addStatus($this->t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', [
+ '%admin_theme' => $themes[$admin_theme]->info['name'],
+ '%selected_theme' => $themes[$theme]->info['name'],
+ ]));
+ }
+ else {
+ $this->messenger()->addStatus($this->t('%theme is now the default theme.', ['%theme' => $themes[$theme]->info['name']]));
+ }
+ }
+ else {
+ $this->messenger()->addStatus($this->t('The %theme theme has been installed.', ['%theme' => $themes[$theme]->info['name']]));
+ }
+ }
+ else {
+ $this->messenger()->addError($this->t('The %theme theme was not found.', ['%theme' => $theme]));
+ }
+ }
+ catch (PreExistingConfigException $e) {
+ $config_objects = $e->flattenConfigObjects($e->getConfigObjects());
+ $this->messenger()->addError(
+ $this->formatPlural(
+ count($config_objects),
+ 'Unable to install @extension, %config_names already exists in active configuration.',
+ 'Unable to install @extension, %config_names already exist in active configuration.',
+ [
+ '%config_names' => implode(', ', $config_objects),
+ '@extension' => $theme,
+ ])
+ );
+ }
+ catch (UnmetDependenciesException $e) {
+ $this->messenger()->addError($e->getTranslatedMessage($this->getStringTranslation(), $theme));
+ }
+ $form_state->setRedirectUrl($this->getCancelUrl());
+ }
+
+}
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 75f95acc5c32..cafd176ffa7a 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -65,18 +65,33 @@ function system_requirements($phase) {
}
// Warn if any experimental modules are installed.
- $experimental = [];
+ $experimental_modules = [];
$enabled_modules = \Drupal::moduleHandler()->getModuleList();
foreach ($enabled_modules as $module => $data) {
$info = \Drupal::service('extension.list.module')->getExtensionInfo($module);
if (isset($info['package']) && $info['package'] === 'Core (Experimental)') {
- $experimental[$module] = $info['name'];
+ $experimental_modules[$module] = $info['name'];
}
}
- if (!empty($experimental)) {
- $requirements['experimental'] = [
+ if (!empty($experimental_modules)) {
+ $requirements['experimental_modules'] = [
'title' => t('Experimental modules enabled'),
- 'value' => t('Experimental modules found: %module_list. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', ['%module_list' => implode(', ', $experimental), ':url' => 'https://www.drupal.org/core/experimental']),
+ 'value' => t('Experimental modules found: %module_list. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', ['%module_list' => implode(', ', $experimental_modules), ':url' => 'https://www.drupal.org/core/experimental']),
+ 'severity' => REQUIREMENT_WARNING,
+ ];
+ }
+ // Warn if any experimental themes are installed.
+ $experimental_themes = [];
+ $installed_themes = \Drupal::service('theme_handler')->listInfo();
+ foreach ($installed_themes as $theme => $data) {
+ if (isset($data->info['experimental']) && $data->info['experimental']) {
+ $experimental_themes[$theme] = $data->info['name'];
+ }
+ }
+ if (!empty($experimental_themes)) {
+ $requirements['experimental_themes'] = [
+ 'title' => t('Experimental themes enabled'),
+ 'value' => t('Experimental themes found: %theme_list. Experimental themes are provided for testing purposes only. Use at your own risk.', ['%theme_list' => implode(', ', $experimental_themes)]),
'severity' => REQUIREMENT_WARNING,
];
}
diff --git a/core/modules/system/tests/src/Functional/Theme/ExperimentalThemeTest.php b/core/modules/system/tests/src/Functional/Theme/ExperimentalThemeTest.php
new file mode 100644
index 000000000000..be37f4a23c32
--- /dev/null
+++ b/core/modules/system/tests/src/Functional/Theme/ExperimentalThemeTest.php
@@ -0,0 +1,128 @@
+<?php
+
+namespace Drupal\Tests\system\Functional\Theme;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests the installation of themes.
+ *
+ * @group Theme
+ */
+class ExperimentalThemeTest extends BrowserTestBase {
+
+ /**
+ * The admin user.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $adminUser;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+ $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer themes']);
+ $this->drupalLogin($this->adminUser);
+ }
+
+ /**
+ * Tests installing experimental themes and dependencies in the UI.
+ */
+ public function testExperimentalConfirmForm() {
+ // Only experimental themes should be marked as such with a parenthetical.
+ $this->drupalGet('admin/appearance');
+ $this->assertText(sprintf('Experimental test %s (experimental theme)', \Drupal::VERSION));
+ $this->assertText(sprintf('Experimental dependency test %s', \Drupal::VERSION));
+
+ // First, test installing a non-experimental theme with no dependencies.
+ // There should be no confirmation form and no experimental theme warning.
+ $this->drupalGet('admin/appearance');
+ $this->cssSelect('a[title="Install <strong>Test theme</strong> theme"]')[0]->click();
+ $this->assertText('The <strong>Test theme</strong> theme has been installed.');
+ $this->assertNoText('Experimental modules are provided for testing purposes only.');
+
+ // Next, test installing an experimental theme with no dependencies.
+ // There should be a confirmation form with an experimental warning, but no
+ // list of dependencies.
+ $this->drupalGet('admin/appearance');
+ $this->cssSelect('a[title="Install Experimental test theme"]')[0]->click();
+ $this->assertText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+
+ // The module should not be enabled and there should be a warning and a
+ // list of the experimental modules with only this one.
+ $this->assertNoText('The Experimental Test theme has been installed.');
+ $this->assertText('Experimental themes are provided for testing purposes only.');
+
+ // There should be no message about enabling dependencies.
+ $this->assertNoText('You must enable');
+
+ // Enable the theme and confirm that it worked.
+ $this->drupalPostForm(NULL, [], 'Continue');
+ $this->assertText('The Experimental test theme has been installed.');
+
+ // Setting it as the default should not ask for another confirmation.
+ $this->cssSelect('a[title="Set Experimental test as default theme"]')[0]->click();
+ $this->assertNoText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+ $this->assertText('Experimental test is now the default theme.');
+ $this->assertNoText(sprintf('Experimental test %s (experimental theme)', \Drupal::VERSION));
+ $this->assertText(sprintf('Experimental test %s (default theme, administration theme, experimental theme)', \Drupal::VERSION));
+
+ // Uninstall the theme.
+ $this->config('system.theme')->set('default', 'test_theme')->save();
+ \Drupal::service('theme_handler')->refreshInfo();
+ \Drupal::service('theme_installer')->uninstall(['experimental_theme_test']);
+
+ // Reinstall the same experimental theme, but this time immediately set it
+ // as the default. This should again trigger a confirmation form with an
+ // experimental warning.
+ $this->drupalGet('admin/appearance');
+ $this->cssSelect('a[title="Install Experimental test as default theme"]')[0]->click();
+ $this->assertText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+
+ // Test enabling a theme that is not itself experimental, but that depends
+ // on an experimental module.
+ $this->drupalGet('admin/appearance');
+ $this->cssSelect('a[title="Install Experimental dependency test theme"]')[0]->click();
+
+ // The theme should not be enabled and there should be a warning and a
+ // list of the experimental modules with only this one.
+ $this->assertNoText('The Experimental dependency test theme has been installed.');
+ $this->assertText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+ $this->assertText('The following themes are experimental: Experimental test');
+
+ // Ensure the non-experimental theme is not listed as experimental.
+ $this->assertNoText('The following themes are experimental: Experimental test, Experimental dependency test');
+ $this->assertNoText('The following themes are experimental: Experimental dependency test');
+
+ // There should be a message about enabling dependencies.
+ $this->assertText('You must enable the Experimental test theme to install Experimental dependency test');
+
+ // Enable the theme and confirm that it worked.
+ $this->drupalPostForm(NULL, [], 'Continue');
+ $this->assertText('The Experimental dependency test theme has been installed.');
+ $this->assertText(sprintf('Experimental test %s (experimental theme)', \Drupal::VERSION));
+ $this->assertText(sprintf('Experimental dependency test %s', \Drupal::VERSION));
+
+ // Setting it as the default should not ask for another confirmation.
+ $this->cssSelect('a[title="Set Experimental dependency test as default theme"]')[0]->click();
+ $this->assertNoText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+ $this->assertText('Experimental dependency test is now the default theme.');
+ $this->assertText(sprintf('Experimental test %s (experimental theme)', \Drupal::VERSION));
+ $this->assertText(sprintf('Experimental dependency test %s (default theme, administration theme)', \Drupal::VERSION));
+
+ // Uninstall the theme.
+ $this->config('system.theme')->set('default', 'test_theme')->save();
+ \Drupal::service('theme_handler')->refreshInfo();
+ \Drupal::service('theme_installer')->uninstall(['experimental_theme_test', 'experimental_theme_dependency_test']);
+
+ // Reinstall the same theme, but this time immediately set it as the
+ // default. This should again trigger a confirmation form with an
+ // experimental warning for its dependency.
+ $this->drupalGet('admin/appearance');
+ $this->cssSelect('a[title="Install Experimental dependency test as default theme"]')[0]->click();
+ $this->assertText('Experimental themes are provided for testing purposes only. Use at your own risk.');
+ }
+
+}
diff --git a/core/modules/system/tests/themes/experimental_theme_dependency_test/experimental_theme_dependency_test.info.yml b/core/modules/system/tests/themes/experimental_theme_dependency_test/experimental_theme_dependency_test.info.yml
new file mode 100644
index 000000000000..af20957d6935
--- /dev/null
+++ b/core/modules/system/tests/themes/experimental_theme_dependency_test/experimental_theme_dependency_test.info.yml
@@ -0,0 +1,6 @@
+name: 'Experimental dependency test'
+type: theme
+description: 'Experimental dependency test theme.'
+version: VERSION
+core: 8.x
+base theme: experimental_theme_test
diff --git a/core/modules/system/tests/themes/experimental_theme_test/experimental_theme_test.info.yml b/core/modules/system/tests/themes/experimental_theme_test/experimental_theme_test.info.yml
new file mode 100644
index 000000000000..e80490a4d845
--- /dev/null
+++ b/core/modules/system/tests/themes/experimental_theme_test/experimental_theme_test.info.yml
@@ -0,0 +1,7 @@
+name: 'Experimental test'
+type: theme
+description: 'Experimental test theme.'
+version: VERSION
+core: 8.x
+base theme: false
+experimental: true
--
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