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[yaffs-website] / web / core / tests / Drupal / KernelTests / Core / Config / ConfigImporterTest.php
diff --git a/web/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php b/web/core/tests/Drupal/KernelTests/Core/Config/ConfigImporterTest.php
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+<?php
+
+namespace Drupal\KernelTests\Core\Config;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\SafeMarkup;
+use Drupal\Core\Config\ConfigImporter;
+use Drupal\Core\Config\ConfigImporterException;
+use Drupal\Core\Config\StorageComparer;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Tests importing configuration from files into active configuration.
+ *
+ * @group config
+ */
+class ConfigImporterTest extends KernelTestBase {
+
+  /**
+   * Config Importer object used for testing.
+   *
+   * @var \Drupal\Core\Config\ConfigImporter
+   */
+  protected $configImporter;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['config_test', 'system', 'config_import_test'];
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installConfig(['config_test']);
+    // Installing config_test's default configuration pollutes the global
+    // variable being used for recording hook invocations by this test already,
+    // so it has to be cleared out manually.
+    unset($GLOBALS['hook_config_test']);
+
+    $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.sync'));
+
+    // Set up the ConfigImporter object for testing.
+    $storage_comparer = new StorageComparer(
+      $this->container->get('config.storage.sync'),
+      $this->container->get('config.storage'),
+      $this->container->get('config.manager')
+    );
+    $this->configImporter = new ConfigImporter(
+      $storage_comparer->createChangelist(),
+      $this->container->get('event_dispatcher'),
+      $this->container->get('config.manager'),
+      $this->container->get('lock'),
+      $this->container->get('config.typed'),
+      $this->container->get('module_handler'),
+      $this->container->get('module_installer'),
+      $this->container->get('theme_handler'),
+      $this->container->get('string_translation')
+    );
+  }
+
+  /**
+   * Tests omission of module APIs for bare configuration operations.
+   */
+  public function testNoImport() {
+    $dynamic_name = 'config_test.dynamic.dotted.default';
+
+    // Verify the default configuration values exist.
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('id'), 'dotted.default');
+
+    // Verify that a bare $this->config() does not involve module APIs.
+    $this->assertFalse(isset($GLOBALS['hook_config_test']));
+  }
+
+  /**
+   * Tests that trying to import from an empty sync configuration directory
+   * fails.
+   */
+  public function testEmptyImportFails() {
+    try {
+      $this->container->get('config.storage.sync')->deleteAll();
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException thrown, successfully stopping an empty import.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->pass('ConfigImporterException thrown, successfully stopping an empty import.');
+    }
+  }
+
+  /**
+   * Tests verification of site UUID before importing configuration.
+   */
+  public function testSiteUuidValidate() {
+    $sync = \Drupal::service('config.storage.sync');
+    // Create updated configuration object.
+    $config_data = $this->config('system.site')->get();
+    // Generate a new site UUID.
+    $config_data['uuid'] = \Drupal::service('uuid')->generate();
+    $sync->write('system.site', $config_data);
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown, invalid import was not stopped due to mis-matching site UUID.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      $expected = ['Site UUID in source storage does not match the target storage.'];
+      $this->assertEqual($expected, $error_log);
+    }
+  }
+
+  /**
+   * Tests deletion of configuration during import.
+   */
+  public function testDeleted() {
+    $dynamic_name = 'config_test.dynamic.dotted.default';
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+
+    // Verify the default configuration values exist.
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('id'), 'dotted.default');
+
+    // Delete the file from the sync directory.
+    $sync->delete($dynamic_name);
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    // Verify the file has been removed.
+    $this->assertIdentical($storage->read($dynamic_name), FALSE);
+
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('id'), NULL);
+
+    // Verify that appropriate module API hooks have been invoked.
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['load']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['presave']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['insert']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['update']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['predelete']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['delete']));
+
+    $this->assertFalse($this->configImporter->hasUnprocessedConfigurationChanges());
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 0);
+  }
+
+  /**
+   * Tests creation of configuration during import.
+   */
+  public function testNew() {
+    $dynamic_name = 'config_test.dynamic.new';
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+
+    // Verify the configuration to create does not exist yet.
+    $this->assertIdentical($storage->exists($dynamic_name), FALSE, $dynamic_name . ' not found.');
+
+    // Create new config entity.
+    $original_dynamic_data = [
+      'uuid' => '30df59bd-7b03-4cf7-bb35-d42fc49f0651',
+      'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
+      'status' => TRUE,
+      'dependencies' => [],
+      'id' => 'new',
+      'label' => 'New',
+      'weight' => 0,
+      'style' => '',
+      'size' => '',
+      'size_value' => '',
+      'protected_property' => '',
+    ];
+    $sync->write($dynamic_name, $original_dynamic_data);
+
+    $this->assertIdentical($sync->exists($dynamic_name), TRUE, $dynamic_name . ' found.');
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    // Verify the values appeared.
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('label'), $original_dynamic_data['label']);
+
+    // Verify that appropriate module API hooks have been invoked.
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['load']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['presave']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['insert']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['update']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['predelete']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['delete']));
+
+    // Verify that hook_config_import_steps_alter() can add steps to
+    // configuration synchronization.
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['config_import_steps_alter']));
+
+    // Verify that there is nothing more to import.
+    $this->assertFalse($this->configImporter->hasUnprocessedConfigurationChanges());
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 0);
+  }
+
+  /**
+   * Tests that secondary writes are overwritten.
+   */
+  public function testSecondaryWritePrimaryFirst() {
+    $name_primary = 'config_test.dynamic.primary';
+    $name_secondary = 'config_test.dynamic.secondary';
+    $sync = $this->container->get('config.storage.sync');
+    $uuid = $this->container->get('uuid');
+
+    $values_primary = [
+      'id' => 'primary',
+      'label' => 'Primary',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+    ];
+    $sync->write($name_primary, $values_primary);
+    $values_secondary = [
+      'id' => 'secondary',
+      'label' => 'Secondary Sync',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on primary, to ensure that is synced first.
+      'dependencies' => [
+        'config' => [$name_primary],
+      ]
+    ];
+    $sync->write($name_secondary, $values_secondary);
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    $entity_storage = \Drupal::entityManager()->getStorage('config_test');
+    $primary = $entity_storage->load('primary');
+    $this->assertEqual($primary->id(), 'primary');
+    $this->assertEqual($primary->uuid(), $values_primary['uuid']);
+    $this->assertEqual($primary->label(), $values_primary['label']);
+    $secondary = $entity_storage->load('secondary');
+    $this->assertEqual($secondary->id(), 'secondary');
+    $this->assertEqual($secondary->uuid(), $values_secondary['uuid']);
+    $this->assertEqual($secondary->label(), $values_secondary['label']);
+
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 1);
+    $this->assertEqual($logs[0], SafeMarkup::format('Deleted and replaced configuration entity "@name"', ['@name' => $name_secondary]));
+  }
+
+  /**
+   * Tests that secondary writes are overwritten.
+   */
+  public function testSecondaryWriteSecondaryFirst() {
+    $name_primary = 'config_test.dynamic.primary';
+    $name_secondary = 'config_test.dynamic.secondary';
+    $sync = $this->container->get('config.storage.sync');
+    $uuid = $this->container->get('uuid');
+
+    $values_primary = [
+      'id' => 'primary',
+      'label' => 'Primary',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on secondary, so that is synced first.
+      'dependencies' => [
+        'config' => [$name_secondary],
+      ]
+    ];
+    $sync->write($name_primary, $values_primary);
+    $values_secondary = [
+      'id' => 'secondary',
+      'label' => 'Secondary Sync',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+    ];
+    $sync->write($name_secondary, $values_secondary);
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    $entity_storage = \Drupal::entityManager()->getStorage('config_test');
+    $primary = $entity_storage->load('primary');
+    $this->assertEqual($primary->id(), 'primary');
+    $this->assertEqual($primary->uuid(), $values_primary['uuid']);
+    $this->assertEqual($primary->label(), $values_primary['label']);
+    $secondary = $entity_storage->load('secondary');
+    $this->assertEqual($secondary->id(), 'secondary');
+    $this->assertEqual($secondary->uuid(), $values_secondary['uuid']);
+    $this->assertEqual($secondary->label(), $values_secondary['label']);
+
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 1);
+    $this->assertEqual($logs[0], Html::escape("Unexpected error during import with operation create for $name_primary: 'config_test' entity with ID 'secondary' already exists."));
+  }
+
+  /**
+   * Tests that secondary updates for deleted files work as expected.
+   */
+  public function testSecondaryUpdateDeletedDeleterFirst() {
+    $name_deleter = 'config_test.dynamic.deleter';
+    $name_deletee = 'config_test.dynamic.deletee';
+    $name_other = 'config_test.dynamic.other';
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+    $uuid = $this->container->get('uuid');
+
+    $values_deleter = [
+      'id' => 'deleter',
+      'label' => 'Deleter',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+    ];
+    $storage->write($name_deleter, $values_deleter);
+    $values_deleter['label'] = 'Updated Deleter';
+    $sync->write($name_deleter, $values_deleter);
+    $values_deletee = [
+      'id' => 'deletee',
+      'label' => 'Deletee',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on deleter, to make sure that is synced first.
+      'dependencies' => [
+        'config' => [$name_deleter],
+      ]
+    ];
+    $storage->write($name_deletee, $values_deletee);
+    $values_deletee['label'] = 'Updated Deletee';
+    $sync->write($name_deletee, $values_deletee);
+
+    // Ensure that import will continue after the error.
+    $values_other = [
+      'id' => 'other',
+      'label' => 'Other',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on deleter, to make sure that is synced first. This
+      // will also be synced after the deletee due to alphabetical ordering.
+      'dependencies' => [
+        'config' => [$name_deleter],
+      ]
+    ];
+    $storage->write($name_other, $values_other);
+    $values_other['label'] = 'Updated other';
+    $sync->write($name_other, $values_other);
+
+    // Check update changelist order.
+    $updates = $this->configImporter->reset()->getStorageComparer()->getChangelist('update');
+    $expected = [
+      $name_deleter,
+      $name_deletee,
+      $name_other,
+    ];
+    $this->assertIdentical($expected, $updates);
+
+    // Import.
+    $this->configImporter->import();
+
+    $entity_storage = \Drupal::entityManager()->getStorage('config_test');
+    $deleter = $entity_storage->load('deleter');
+    $this->assertEqual($deleter->id(), 'deleter');
+    $this->assertEqual($deleter->uuid(), $values_deleter['uuid']);
+    $this->assertEqual($deleter->label(), $values_deleter['label']);
+
+    // The deletee was deleted in
+    // \Drupal\config_test\Entity\ConfigTest::postSave().
+    $this->assertFalse($entity_storage->load('deletee'));
+
+    $other = $entity_storage->load('other');
+    $this->assertEqual($other->id(), 'other');
+    $this->assertEqual($other->uuid(), $values_other['uuid']);
+    $this->assertEqual($other->label(), $values_other['label']);
+
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 1);
+    $this->assertEqual($logs[0], SafeMarkup::format('Update target "@name" is missing.', ['@name' => $name_deletee]));
+  }
+
+  /**
+   * Tests that secondary updates for deleted files work as expected.
+   *
+   * This test is completely hypothetical since we only support full
+   * configuration tree imports. Therefore, any configuration updates that cause
+   * secondary deletes should be reflected already in the staged configuration.
+   */
+  public function testSecondaryUpdateDeletedDeleteeFirst() {
+    $name_deleter = 'config_test.dynamic.deleter';
+    $name_deletee = 'config_test.dynamic.deletee';
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+    $uuid = $this->container->get('uuid');
+
+    $values_deleter = [
+      'id' => 'deleter',
+      'label' => 'Deleter',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on deletee, to make sure that is synced first.
+      'dependencies' => [
+        'config' => [$name_deletee],
+      ],
+    ];
+    $storage->write($name_deleter, $values_deleter);
+    $values_deleter['label'] = 'Updated Deleter';
+    $sync->write($name_deleter, $values_deleter);
+    $values_deletee = [
+      'id' => 'deletee',
+      'label' => 'Deletee',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+    ];
+    $storage->write($name_deletee, $values_deletee);
+    $values_deletee['label'] = 'Updated Deletee';
+    $sync->write($name_deletee, $values_deletee);
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    $entity_storage = \Drupal::entityManager()->getStorage('config_test');
+    // Both entities are deleted. ConfigTest::postSave() causes updates of the
+    // deleter entity to delete the deletee entity. Since the deleter depends on
+    // the deletee, removing the deletee causes the deleter to be removed.
+    $this->assertFalse($entity_storage->load('deleter'));
+    $this->assertFalse($entity_storage->load('deletee'));
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 0);
+  }
+
+  /**
+   * Tests that secondary deletes for deleted files work as expected.
+   */
+  public function testSecondaryDeletedDeleteeSecond() {
+    $name_deleter = 'config_test.dynamic.deleter';
+    $name_deletee = 'config_test.dynamic.deletee';
+    $storage = $this->container->get('config.storage');
+
+    $uuid = $this->container->get('uuid');
+
+    $values_deleter = [
+      'id' => 'deleter',
+      'label' => 'Deleter',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+      // Add a dependency on deletee, to make sure this delete is synced first.
+      'dependencies' => [
+        'config' => [$name_deletee],
+      ],
+    ];
+    $storage->write($name_deleter, $values_deleter);
+    $values_deletee = [
+      'id' => 'deletee',
+      'label' => 'Deletee',
+      'weight' => 0,
+      'uuid' => $uuid->generate(),
+    ];
+    $storage->write($name_deletee, $values_deletee);
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    $entity_storage = \Drupal::entityManager()->getStorage('config_test');
+    $this->assertFalse($entity_storage->load('deleter'));
+    $this->assertFalse($entity_storage->load('deletee'));
+    // The deletee entity does not exist as the delete worked and although the
+    // delete occurred in \Drupal\config_test\Entity\ConfigTest::postDelete()
+    // this does not matter.
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 0);
+  }
+
+  /**
+   * Tests updating of configuration during import.
+   */
+  public function testUpdated() {
+    $name = 'config_test.system';
+    $dynamic_name = 'config_test.dynamic.dotted.default';
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+
+    // Verify that the configuration objects to import exist.
+    $this->assertIdentical($storage->exists($name), TRUE, $name . ' found.');
+    $this->assertIdentical($storage->exists($dynamic_name), TRUE, $dynamic_name . ' found.');
+
+    // Replace the file content of the existing configuration objects in the
+    // sync directory.
+    $original_name_data = [
+      'foo' => 'beer',
+    ];
+    $sync->write($name, $original_name_data);
+    $original_dynamic_data = $storage->read($dynamic_name);
+    $original_dynamic_data['label'] = 'Updated';
+    $sync->write($dynamic_name, $original_dynamic_data);
+
+    // Verify the active configuration still returns the default values.
+    $config = $this->config($name);
+    $this->assertIdentical($config->get('foo'), 'bar');
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('label'), 'Default');
+
+    // Import.
+    $this->configImporter->reset()->import();
+
+    // Verify the values were updated.
+    \Drupal::configFactory()->reset($name);
+    $config = $this->config($name);
+    $this->assertIdentical($config->get('foo'), 'beer');
+    $config = $this->config($dynamic_name);
+    $this->assertIdentical($config->get('label'), 'Updated');
+
+    // Verify that the original file content is still the same.
+    $this->assertIdentical($sync->read($name), $original_name_data);
+    $this->assertIdentical($sync->read($dynamic_name), $original_dynamic_data);
+
+    // Verify that appropriate module API hooks have been invoked.
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['load']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['presave']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['insert']));
+    $this->assertTrue(isset($GLOBALS['hook_config_test']['update']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['predelete']));
+    $this->assertFalse(isset($GLOBALS['hook_config_test']['delete']));
+
+    // Verify that there is nothing more to import.
+    $this->assertFalse($this->configImporter->hasUnprocessedConfigurationChanges());
+    $logs = $this->configImporter->getErrors();
+    $this->assertEqual(count($logs), 0);
+  }
+
+  /**
+   * Tests the isInstallable method()
+   */
+  public function testIsInstallable() {
+    $config_name = 'config_test.dynamic.isinstallable';
+    $this->assertFalse($this->container->get('config.storage')->exists($config_name));
+    \Drupal::state()->set('config_test.isinstallable', TRUE);
+    $this->installConfig(['config_test']);
+    $this->assertTrue($this->container->get('config.storage')->exists($config_name));
+  }
+
+  /**
+   * Tests dependency validation during configuration import.
+   *
+   * @see \Drupal\Core\EventSubscriber\ConfigImportSubscriber
+   * @see \Drupal\Core\Config\ConfigImporter::createExtensionChangelist()
+   */
+  public function testUnmetDependency() {
+    $storage = $this->container->get('config.storage');
+    $sync = $this->container->get('config.storage.sync');
+
+    // Test an unknown configuration owner.
+    $sync->write('unknown.config', ['test' => 'test']);
+
+    // Make a config entity have unmet dependencies.
+    $config_entity_data = $sync->read('config_test.dynamic.dotted.default');
+    $config_entity_data['dependencies'] = ['module' => ['unknown']];
+    $sync->write('config_test.dynamic.dotted.module', $config_entity_data);
+    $config_entity_data['dependencies'] = ['theme' => ['unknown']];
+    $sync->write('config_test.dynamic.dotted.theme', $config_entity_data);
+    $config_entity_data['dependencies'] = ['config' => ['unknown']];
+    $sync->write('config_test.dynamic.dotted.config', $config_entity_data);
+
+    // Make an active config depend on something that is missing in sync.
+    // The whole configuration needs to be consistent, not only the updated one.
+    $config_entity_data['dependencies'] = [];
+    $storage->write('config_test.dynamic.dotted.deleted', $config_entity_data);
+    $config_entity_data['dependencies'] = ['config' => ['config_test.dynamic.dotted.deleted']];
+    $storage->write('config_test.dynamic.dotted.existing', $config_entity_data);
+    $sync->write('config_test.dynamic.dotted.existing', $config_entity_data);
+
+    $extensions = $sync->read('core.extension');
+    // Add a module and a theme that do not exist.
+    $extensions['module']['unknown_module'] = 0;
+    $extensions['theme']['unknown_theme'] = 0;
+    // Add a module and a theme that depend on uninstalled extensions.
+    $extensions['module']['book'] = 0;
+    $extensions['theme']['bartik'] = 0;
+
+    $sync->write('core.extension', $extensions);
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown; an invalid import was not stopped due to missing dependencies.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      $expected = [
+        'Unable to install the <em class="placeholder">unknown_module</em> module since it does not exist.',
+        'Unable to install the <em class="placeholder">Book</em> module since it requires the <em class="placeholder">Node, Text, Field, Filter, User</em> modules.',
+        'Unable to install the <em class="placeholder">unknown_theme</em> theme since it does not exist.',
+        'Unable to install the <em class="placeholder">Bartik</em> theme since it requires the <em class="placeholder">Classy</em> theme.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.config</em> depends on the <em class="placeholder">unknown</em> configuration that will not exist after import.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.existing</em> depends on the <em class="placeholder">config_test.dynamic.dotted.deleted</em> configuration that will not exist after import.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.module</em> depends on the <em class="placeholder">unknown</em> module that will not be installed after import.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.theme</em> depends on the <em class="placeholder">unknown</em> theme that will not be installed after import.',
+        'Configuration <em class="placeholder">unknown.config</em> depends on the <em class="placeholder">unknown</em> extension that will not be installed after import.',
+      ];
+      foreach ($expected as $expected_message) {
+        $this->assertTrue(in_array($expected_message, $error_log), $expected_message);
+      }
+    }
+
+    // Make a config entity have mulitple unmet dependencies.
+    $config_entity_data = $sync->read('config_test.dynamic.dotted.default');
+    $config_entity_data['dependencies'] = ['module' => ['unknown', 'dblog']];
+    $sync->write('config_test.dynamic.dotted.module', $config_entity_data);
+    $config_entity_data['dependencies'] = ['theme' => ['unknown', 'seven']];
+    $sync->write('config_test.dynamic.dotted.theme', $config_entity_data);
+    $config_entity_data['dependencies'] = ['config' => ['unknown', 'unknown2']];
+    $sync->write('config_test.dynamic.dotted.config', $config_entity_data);
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown, invalid import was not stopped due to missing dependencies.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      $expected = [
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.config</em> depends on configuration (<em class="placeholder">unknown, unknown2</em>) that will not exist after import.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.module</em> depends on modules (<em class="placeholder">unknown, Database Logging</em>) that will not be installed after import.',
+        'Configuration <em class="placeholder">config_test.dynamic.dotted.theme</em> depends on themes (<em class="placeholder">unknown, Seven</em>) that will not be installed after import.',
+      ];
+      foreach ($expected as $expected_message) {
+        $this->assertTrue(in_array($expected_message, $error_log), $expected_message);
+      }
+    }
+  }
+
+  /**
+   * Tests missing core.extension during configuration import.
+   *
+   * @see \Drupal\Core\EventSubscriber\ConfigImportSubscriber
+   */
+  public function testMissingCoreExtension() {
+    $sync = $this->container->get('config.storage.sync');
+    $sync->delete('core.extension');
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown, invalid import was not stopped due to missing dependencies.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      $this->assertEqual(['The core.extension configuration does not exist.'], $error_log);
+    }
+  }
+
+  /**
+   * Tests install profile validation during configuration import.
+   *
+   * @see \Drupal\Core\EventSubscriber\ConfigImportSubscriber
+   */
+  public function testInstallProfile() {
+    $sync = $this->container->get('config.storage.sync');
+
+    $extensions = $sync->read('core.extension');
+    // Add an install profile.
+    $extensions['module']['standard'] = 0;
+
+    $sync->write('core.extension', $extensions);
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown; an invalid import was not stopped due to missing dependencies.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      // Install profiles should not even be scanned at this point.
+      $this->assertEqual(['Unable to install the <em class="placeholder">standard</em> module since it does not exist.'], $error_log);
+    }
+  }
+
+  /**
+   * Tests install profile validation during configuration import.
+   *
+   * @see \Drupal\Core\EventSubscriber\ConfigImportSubscriber
+   */
+  public function testInstallProfileMisMatch() {
+    $sync = $this->container->get('config.storage.sync');
+
+    $extensions = $sync->read('core.extension');
+    // Change the install profile.
+    $extensions['profile'] = 'this_will_not_work';
+    $sync->write('core.extension', $extensions);
+
+    try {
+      $this->configImporter->reset()->import();
+      $this->fail('ConfigImporterException not thrown; an invalid import was not stopped due to missing dependencies.');
+    }
+    catch (ConfigImporterException $e) {
+      $this->assertEqual($e->getMessage(), 'There were errors validating the config synchronization.');
+      $error_log = $this->configImporter->getErrors();
+      // Install profiles can not be changed. Note that KernelTestBase currently
+      // does not use an install profile. This situation should be impossible
+      // to get in but site's can removed the install profile setting from
+      // settings.php so the test is valid.
+      $this->assertEqual(['Cannot change the install profile from <em class="placeholder">this_will_not_work</em> to <em class="placeholder"></em> once Drupal is installed.'], $error_log);
+    }
+  }
+
+  /**
+   * Tests config_get_config_directory().
+   */
+  public function testConfigGetConfigDirectory() {
+    global $config_directories;
+    $directory = config_get_config_directory(CONFIG_SYNC_DIRECTORY);
+    $this->assertEqual($config_directories[CONFIG_SYNC_DIRECTORY], $directory);
+
+    $message = 'Calling config_get_config_directory() with CONFIG_ACTIVE_DIRECTORY results in an exception.';
+    try {
+      config_get_config_directory(CONFIG_ACTIVE_DIRECTORY);
+      $this->fail($message);
+    }
+    catch (\Exception $e) {
+      $this->pass($message);
+    }
+  }
+
+  /**
+   * Tests the isSyncing flags.
+   */
+  public function testIsSyncingInHooks() {
+    $dynamic_name = 'config_test.dynamic.dotted.default';
+    $storage = $this->container->get('config.storage');
+
+    // Verify the default configuration values exist.
+    $config = $this->config($dynamic_name);
+    $this->assertSame('dotted.default', $config->get('id'));
+
+    // Delete the config so that create hooks will fire.
+    $storage->delete($dynamic_name);
+    \Drupal::state()->set('config_test.store_isSyncing', []);
+    $this->configImporter->reset()->import();
+
+    // The values of the syncing values should be stored in state by
+    // config_test_config_test_create().
+    $state = \Drupal::state()->get('config_test.store_isSyncing');
+    $this->assertTrue($state['global_state::create'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::create'], 'ConfigEntity::isSyncing() returns TRUE');
+    $this->assertTrue($state['global_state::presave'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::presave'], 'ConfigEntity::isSyncing() returns TRUE');
+    $this->assertTrue($state['global_state::insert'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::insert'], 'ConfigEntity::isSyncing() returns TRUE');
+
+    // Cause a config update so update hooks will fire.
+    $config = $this->config($dynamic_name);
+    $config->set('label', 'A new name')->save();
+    \Drupal::state()->set('config_test.store_isSyncing', []);
+    $this->configImporter->reset()->import();
+
+    // The values of the syncing values should be stored in state by
+    // config_test_config_test_create().
+    $state = \Drupal::state()->get('config_test.store_isSyncing');
+    $this->assertTrue($state['global_state::presave'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::presave'], 'ConfigEntity::isSyncing() returns TRUE');
+    $this->assertTrue($state['global_state::update'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::update'], 'ConfigEntity::isSyncing() returns TRUE');
+
+    // Cause a config delete so delete hooks will fire.
+    $sync = $this->container->get('config.storage.sync');
+    $sync->delete($dynamic_name);
+    \Drupal::state()->set('config_test.store_isSyncing', []);
+    $this->configImporter->reset()->import();
+
+    // The values of the syncing values should be stored in state by
+    // config_test_config_test_create().
+    $state = \Drupal::state()->get('config_test.store_isSyncing');
+    $this->assertTrue($state['global_state::predelete'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::predelete'], 'ConfigEntity::isSyncing() returns TRUE');
+    $this->assertTrue($state['global_state::delete'], '\Drupal::isConfigSyncing() returns TRUE');
+    $this->assertTrue($state['entity_state::delete'], 'ConfigEntity::isSyncing() returns TRUE');
+  }
+
+  /**
+   * Tests that the isConfigSyncing flag is cleanup after an invalid step.
+   */
+  public function testInvalidStep() {
+    $this->assertFalse(\Drupal::isConfigSyncing(), 'Before an import \Drupal::isConfigSyncing() returns FALSE');
+    $context = [];
+    try {
+      $this->configImporter->doSyncStep('a_non_existent_step', $context);
+      $this->fail('Expected \InvalidArgumentException thrown');
+    }
+    catch (\InvalidArgumentException $e) {
+      $this->pass('Expected \InvalidArgumentException thrown');
+    }
+    $this->assertFalse(\Drupal::isConfigSyncing(), 'After an invalid step \Drupal::isConfigSyncing() returns FALSE');
+  }
+
+  /**
+   * Tests that the isConfigSyncing flag is set correctly during a custom step.
+   */
+  public function testCustomStep() {
+    $this->assertFalse(\Drupal::isConfigSyncing(), 'Before an import \Drupal::isConfigSyncing() returns FALSE');
+    $context = [];
+    $this->configImporter->doSyncStep([self::class, 'customStep'], $context);
+    $this->assertTrue($context['is_syncing'], 'Inside a custom step \Drupal::isConfigSyncing() returns TRUE');
+    $this->assertFalse(\Drupal::isConfigSyncing(), 'After an valid custom step \Drupal::isConfigSyncing() returns FALSE');
+  }
+
+  /**
+   * Helper meothd to test custom config installer steps.
+   *
+   * @param array $context
+   *   Batch context.
+   * @param \Drupal\Core\Config\ConfigImporter $importer
+   *   The config importer.
+   */
+  public static function customStep(array &$context, ConfigImporter $importer) {
+    $context['is_syncing'] = \Drupal::isConfigSyncing();
+  }
+
+}