NewDefaultThemeBlocksTest.php

<?php

namespace Drupal\Tests\block\Kernel;

use Drupal\KernelTests\KernelTestBase;
use Drupal\Tests\block\Traits\BlockCreationTrait;

/**
 * Tests that a new default theme gets blocks.
 *
 * @group block
 */
class NewDefaultThemeBlocksTest extends KernelTestBase {
  use BlockCreationTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'block',
    'system',
  ];
  
  /**
   * Check the blocks are correctly copied by block_themes_installed().
   */
  public function testNewDefaultThemeBlocks() {
    $this->installConfig([
      'system',
    ]);
    /** @var \Drupal\Core\Extension\ThemeInstallerInterface $theme_installer */
    $theme_installer = $this->container
      ->get('theme_installer');
    $default_theme = $this->config('system.theme')
      ->get('default');
    // Add two instances of the user login block.
    $this->placeBlock('user_login_block', [
      'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
    ]);
    $this->placeBlock('user_login_block', [
      'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
    ]);
    // Add an instance of a different block.
    $this->placeBlock('system_powered_by_block', [
      'id' => $default_theme . '_' . strtolower($this->randomMachineName(8)),
    ]);
    // Install a different theme that does not have blocks.
    $new_theme = 'test_theme';
    // The new theme is different from the previous default theme.
    $this->assertNotEquals($new_theme, $default_theme);
    $theme_installer->install([
      $new_theme,
    ]);
    $this->config('system.theme')
      ->set('default', $new_theme)
      ->save();
    $block_storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('block');
    // Ensure that the new default theme has the same blocks as the previous
    // default theme.
    $default_block_names = $block_storage->getQuery()
      ->condition('theme', $default_theme)
      ->execute();
    $new_blocks = $block_storage->getQuery()
      ->condition('theme', $new_theme)
      ->execute();
    $this->assertSameSize($default_block_names, $new_blocks);
    foreach ($default_block_names as $default_block_name) {
      // Remove the matching block from the list of blocks in the new theme.
      // E.g., if the old theme has block.block.stark_admin,
      // unset block.block.olivero_admin.
      unset($new_blocks[str_replace($default_theme . '_', $new_theme . '_', $default_block_name)]);
    }
    $this->assertEmpty($new_blocks);
    // Install a hidden base theme and ensure blocks are not copied.
    $base_theme = 'test_basetheme';
    $theme_installer->install([
      $base_theme,
    ]);
    $new_blocks = $block_storage->getQuery()
      ->condition('theme', $base_theme)
      ->execute();
    // Installing a hidden base theme does not copy the blocks from the default
    // theme.
    $this->assertEmpty($new_blocks);
  }

}