ModuleInstallOrderTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Module;

use PHPUnit\Framework\Attributes\Group;
use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;

/**
 * Enable module without dependency enabled.
 */
class ModuleInstallOrderTest extends ModuleTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests that module dependencies are installed correctly in the UI.
   *
   * Dependencies should be installed before their dependents.
   */
  public function testModuleInstallOrder() : void {
    \Drupal::service('module_installer')->install([
      'module_test',
    ], FALSE);
    $this->resetAll();
    $this->assertModules([
      'module_test',
    ], TRUE);
    \Drupal::state()->set('module_test.dependency', 'dependency');
    // module_test creates a dependency chain: dblog depends on config which
    // depends on help.
    $expected_order = [
      'help',
      'config',
      'dblog',
    ];
    // Enable the modules through the UI, verifying that the dependency chain
    // is correct.
    $edit = [];
    $edit['modules[dblog][enable]'] = 'dblog';
    $this->drupalGet('admin/modules');
    $this->submitForm($edit, 'Install');
    $this->assertModules([
      'dblog',
    ], FALSE);
    // Note that dependencies are sorted alphabetically in the confirmation
    // message.
    $this->assertSession()
      ->pageTextContains('You must install the following modules to install Database Logging:Configuration ManagerHelp');
    $this->drupalGet('admin/modules');
    $edit['modules[config][enable]'] = 'config';
    $edit['modules[help][enable]'] = 'help';
    $this->submitForm($edit, 'Install');
    $this->assertModules([
      'dblog',
      'config',
      'help',
    ], TRUE);
    // Check the actual order which is saved by module_test_modules_enabled().
    $module_order = \Drupal::state()->get('module_test.install_order', []);
    $this->assertSame($expected_order, $module_order);
  }

}