class ExcludedModulesEventSubscriberTest

class ExcludedModulesEventSubscriberTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'system',
    'config_test',
    'config_exclude_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installConfig([
      'system',
      'config_test',
      'config_exclude_test',
    ]);
    $this->setSetting('config_exclude_modules', [
      'config_test',
    ]);
  }
  
  /**
   * Tests excluding modules from the config export.
   */
  public function testExcludedModules() {
    // Assert that config_test is in the active config.
    $active = $this->container
      ->get('config.storage');
    $this->assertNotEmpty($active->listAll('config_test.'));
    $this->assertNotEmpty($active->listAll('system.'));
    $this->assertArrayHasKey('config_test', $active->read('core.extension')['module']);
    $collection = $this->randomMachineName();
    foreach ($active->listAll() as $config) {
      $active->createCollection($collection)
        ->write($config, $active->read($config));
    }
    // Assert that config_test is not in the export storage.
    $export = $this->container
      ->get('config.storage.export');
    $this->assertEmpty($export->listAll('config_test.'));
    $this->assertNotEmpty($export->listAll('system.'));
    $this->assertEmpty($export->createCollection($collection)
      ->listAll('config_test.'));
    $this->assertNotEmpty($export->createCollection($collection)
      ->listAll('system.'));
    $this->assertArrayNotHasKey('config_test', $export->read('core.extension')['module']);
    // The config_exclude_test is not excluded but the menu it installs are.
    $this->assertArrayHasKey('config_exclude_test', $export->read('core.extension')['module']);
    $this->assertFalse($export->exists('system.menu.exclude_test'));
    $this->assertFalse($export->exists('system.menu.indirect_exclude_test'));
    // Assert that config_test is again in the import storage.
    $import = $this->container
      ->get('config.import_transformer')
      ->transform($export);
    $this->assertNotEmpty($import->listAll('config_test.'));
    $this->assertNotEmpty($import->listAll('system.'));
    $this->assertNotEmpty($import->createCollection($collection)
      ->listAll('config_test.'));
    $this->assertNotEmpty($import->createCollection($collection)
      ->listAll('system.'));
    $this->assertArrayHasKey('config_test', $import->read('core.extension')['module']);
    $this->assertArrayHasKey('config_exclude_test', $import->read('core.extension')['module']);
    $this->assertTrue($import->exists('system.menu.exclude_test'));
    $this->assertTrue($import->exists('system.menu.indirect_exclude_test'));
    $this->assertEquals($active->read('core.extension'), $import->read('core.extension'));
    $this->assertEquals($active->listAll(), $import->listAll());
    foreach ($active->listAll() as $config) {
      $this->assertEquals($active->read($config), $import->read($config));
    }
    // When the settings are changed, the next request will get the export
    // storage without the config_test excluded.
    $this->setSetting('config_exclude_modules', []);
    // We rebuild the container to simulate a new request. The managed storage
    // gets the storage from the manager only once.
    $this->container
      ->get('kernel')
      ->rebuildContainer();
    $export = $this->container
      ->get('config.storage.export');
    $this->assertArrayHasKey('config_test', $export->read('core.extension')['module']);
  }

}