class BlockStorageUnitTest

class BlockStorageUnitTest extends KernelTestBase {
  
  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = [
    'block',
    'block_test',
    'system',
  ];
  
  /**
   * The block storage.
   *
   * @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
   */
  protected $controller;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->controller = $this->container
      ->get('entity_type.manager')
      ->getStorage('block');
    $this->container
      ->get('theme_installer')
      ->install([
      'stark',
    ]);
  }
  
  /**
   * Tests CRUD operations.
   */
  public function testBlockCRUD() {
    $this->assertInstanceOf(ConfigEntityStorage::class, $this->controller);
    // Run each test method in the same installation.
    $this->createTests();
    $this->loadTests();
    $this->deleteTests();
  }
  
  /**
   * Tests the creation of blocks.
   */
  protected function createTests() {
    // Attempt to create a block without a plugin.
    try {
      $entity = $this->controller
        ->create([]);
      $entity->getPlugin();
      $this->fail('A block without a plugin was created with no exception thrown.');
    } catch (PluginException $e) {
      $this->assertEquals('The block \'\' did not specify a plugin.', $e->getMessage(), 'An exception was thrown when a block was created without a plugin.');
    }
    // Create a block with only required values.
    $entity = $this->controller
      ->create([
      'id' => 'test_block',
      'theme' => 'stark',
      'region' => 'content',
      'plugin' => 'test_html',
    ]);
    $entity->save();
    $this->assertInstanceOf(Block::class, $entity);
    // Verify all of the block properties.
    $actual_properties = $this->config('block.block.test_block')
      ->get();
    $this->assertNotEmpty($actual_properties['uuid'], 'The block UUID is set.');
    unset($actual_properties['uuid']);
    // Ensure that default values are filled in.
    $expected_properties = [
      'langcode' => \Drupal::languageManager()->getDefaultLanguage()
        ->getId(),
      'status' => TRUE,
      'dependencies' => [
        'module' => [
          'block_test',
        ],
        'theme' => [
          'stark',
        ],
      ],
      'id' => 'test_block',
      'theme' => 'stark',
      'region' => 'content',
      'weight' => NULL,
      'provider' => NULL,
      'plugin' => 'test_html',
      'settings' => [
        'id' => 'test_html',
        'label' => '',
        'label_display' => BlockPluginInterface::BLOCK_LABEL_VISIBLE,
        'provider' => 'block_test',
      ],
      'visibility' => [],
    ];
    $this->assertSame($expected_properties, $actual_properties);
    $this->assertInstanceOf(TestHtmlBlock::class, $entity->getPlugin());
  }
  
  /**
   * Tests the loading of blocks.
   */
  protected function loadTests() {
    $entity = $this->controller
      ->load('test_block');
    $this->assertInstanceOf(Block::class, $entity);
    // Verify several properties of the block.
    $this->assertSame('content', $entity->getRegion());
    $this->assertTrue($entity->status());
    $this->assertEquals('stark', $entity->getTheme());
    $this->assertNotEmpty($entity->uuid());
  }
  
  /**
   * Tests the deleting of blocks.
   */
  protected function deleteTests() {
    $entity = $this->controller
      ->load('test_block');
    // Ensure that the storage isn't currently empty.
    $config_storage = $this->container
      ->get('config.storage');
    $config = $config_storage->listAll('block.block.');
    $this->assertNotEmpty($config, 'There are blocks in config storage.');
    // Delete the block.
    $entity->delete();
    // Ensure that the storage is now empty.
    $config = $config_storage->listAll('block.block.');
    $this->assertEmpty($config, 'There are no blocks in config storage.');
  }
  
  /**
   * Tests the installation of default blocks.
   */
  public function testDefaultBlocks() {
    \Drupal::service('theme_installer')->install([
      'stark',
    ]);
    $entities = $this->controller
      ->loadMultiple();
    $this->assertEmpty($entities, 'There are no blocks initially.');
    // Install the block_test.module, so that its default config is installed.
    $this->installConfig([
      'block_test',
    ]);
    $entities = $this->controller
      ->loadMultiple();
    $entity = reset($entities);
    $this->assertEquals('test_block', $entity->id(), 'The default test block was loaded.');
  }

}