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.');
    }

}