class BlockInvalidRegionTest

class BlockInvalidRegionTest extends BrowserTestBase {
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'block',
        'block_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create an admin user.
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
            'access administration pages',
            'administer blocks',
        ]);
        $this->drupalLogin($admin_user);
    }
    
    /**
     * Tests that blocks assigned to invalid regions work correctly.
     */
    public function testBlockInInvalidRegion() {
        // Enable a test block and place it in an invalid region.
        $block = $this->drupalPlaceBlock('test_html');
        \Drupal::configFactory()->getEditable('block.block.' . $block->id())
            ->set('region', 'invalid_region')
            ->save();
        $block = Block::load($block->id());
        $warning_message = 'The block ' . $block->id() . ' was assigned to the invalid region invalid_region and has been disabled.';
        // Clearing the cache should disable the test block placed in the invalid region.
        $this->drupalGet('admin/config/development/performance');
        $this->submitForm([], 'Clear all caches');
        $this->assertSession()
            ->statusMessageContains($warning_message, 'warning');
        // Clear the cache to check if the warning message is not triggered.
        $this->drupalGet('admin/config/development/performance');
        $this->submitForm([], 'Clear all caches');
        $this->assertSession()
            ->statusMessageNotContains($warning_message, 'warning');
        // Place disabled test block in the invalid region of the default theme.
        \Drupal::configFactory()->getEditable('block.block.' . $block->id())
            ->set('region', 'invalid_region')
            ->save();
        $block = Block::load($block->id());
        // Clear the cache to check if the warning message is not triggered.
        $this->drupalGet('admin/config/development/performance');
        $this->submitForm([], 'Clear all caches');
        $this->assertSession()
            ->statusMessageNotContains($warning_message, 'warning');
    }

}