--- /dev/null
+<?php
+
+namespace Drupal\FunctionalTests\Installer;
+
+use Drupal\Core\Config\FileStorage;
+use Drupal\Core\Config\InstallStorage;
+use Drupal\Core\Config\StorageInterface;
+use Drupal\KernelTests\AssertConfigTrait;
+
+/**
+ * Provides a class for install profiles to check their installed config.
+ */
+abstract class ConfigAfterInstallerTestBase extends InstallerTestBase {
+
+ use AssertConfigTrait;
+
+ /**
+ * Ensures that all the installed config looks like the exported one.
+ *
+ * @param array $skipped_config
+ * An array of skipped config.
+ */
+ protected function assertInstalledConfig(array $skipped_config) {
+ $this->addToAssertionCount(1);
+ /** @var \Drupal\Core\Config\StorageInterface $active_config_storage */
+ $active_config_storage = $this->container->get('config.storage');
+ /** @var \Drupal\Core\Config\ConfigManagerInterface $config_manager */
+ $config_manager = $this->container->get('config.manager');
+
+ $default_install_path = 'core/profiles/' . $this->profile . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY;
+ $profile_config_storage = new FileStorage($default_install_path, StorageInterface::DEFAULT_COLLECTION);
+
+ foreach ($profile_config_storage->listAll() as $config_name) {
+ $result = $config_manager->diff($profile_config_storage, $active_config_storage, $config_name);
+ try {
+ $this->assertConfigDiff($result, $config_name, $skipped_config);
+ }
+ catch (\Exception $e) {
+ $this->fail($e->getMessage());
+ }
+ }
+ }
+
+}