class BlockValidationTest

class BlockValidationTest extends ConfigEntityValidationTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->entity = Block::create([
            'id' => 'test_block',
            'theme' => 'stark',
            'plugin' => 'system_powered_by_block',
            'settings' => [
                'label' => 'Powered by Drupal 🚀',
            ],
        ]);
        $this->entity
            ->save();
    }
    
    /**
     * Tests validating a block with an unknown plugin ID.
     */
    public function testInvalidPluginId() : void {
        $this->entity
            ->set('plugin', 'block_content:d7c9d8ba-663f-41b4-8756-86bc55c44653');
        // Block config entities with invalid block plugin IDs automatically fall
        // back to the `broken` block plugin.
        // @see https://www.drupal.org/node/2249303
        // @see \Drupal\Core\Block\BlockManager::getFallbackPluginId()
        // @see \Drupal\Core\Block\Plugin\Block\Broken
        $this->assertValidationErrors([]);
        $this->entity
            ->set('plugin', 'non_existent');
        // @todo Expect error for this in https://www.drupal.org/project/drupal/issues/3377709
        $this->assertValidationErrors([]);
    }
    
    /**
     * Block names are atypical in that they allow periods in the machine name.
     */
    public static function providerInvalidMachineNameCharacters() : array {
        $cases = parent::providerInvalidMachineNameCharacters();
        // Remove the existing test case that verifies a machine name containing
        // periods is invalid.
        self::assertSame([
            'period.separated',
            FALSE,
        ], $cases['INVALID: period separated']);
        unset($cases['INVALID: period separated']);
        // And instead add a test case that verifies it is allowed for blocks.
        $cases['VALID: period separated'] = [
            'period.separated',
            TRUE,
        ];
        return $cases;
    }
    
    /**
     * {@inheritdoc}
     */
    protected static function setLabel(ConfigEntityInterface $block, string $label) : void {
        static::assertInstanceOf(Block::class, $block);
        $settings = $block->get('settings');
        static::assertNotEmpty($settings['label']);
        $settings['label'] = $label;
        $block->set('settings', $settings);
    }
    
    /**
     * {@inheritdoc}
     */
    public function testLabelValidation() : void {
        static::setLabel($this->entity, "Multi\nLine");
        // TRICKY: because the Block config entity type does not specify a `label`
        // key, it is impossible for the generic ::testLabelValidation()
        // implementation in the base class to know at which property to expect a
        // validation error. Hence it is hardcoded in this case.
        $this->assertValidationErrors([
            'settings.label' => "Labels are not allowed to span multiple lines or contain control characters.",
        ]);
    }

}