Issue #3138122 by eiriksm, esolitos, acbramley: Drupal 9 compatibility

create_user_permission.info.yml

 name: Create user permission
 description: Provides a permission to "create users", instead of having to "administer users"
 core: 8.x
+core_version_requirement: '^8 || ^9'
 type: module

tests/src/FunctionalJavascript/PermissionTest.php → tests/src/Functional/PermissionTest.php

 <?php
 
-namespace Drupal\Tests\create_user_permission\FunctionalJavascript;
+namespace Drupal\Tests\create_user_permission\Functional;
 
-use Drupal\FunctionalJavascriptTests\JavascriptTestBase;
+use Drupal\Tests\BrowserTestBase;
 
 /**
  * Tests the JavaScript functionality of the Create user permission module.
  *
  * @group create_user_permission
  */
-class PermissionTest extends JavascriptTestBase {
+class PermissionTest extends BrowserTestBase {
 
-  public static $modules = [
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
     'create_user_permission',
   ];
 

tests/src/Functional/UserNotBlockedTest.php

@@ -14,7 +14,12 @@ class UserNotBlockedTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['create_user_permission'];
+  protected $defaultTheme = 'stark';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['create_user_permission'];
 
   /**
    * Test that users created are not blocked.

tests/src/FunctionalJavascript/CanNotifyTest.php

 <?php
 
-namespace Drupal\Tests\create_user_permission\FunctionalJavascript;
+namespace Drupal\Tests\create_user_permission\Functional;
 
-use Drupal\FunctionalJavascriptTests\JavascriptTestBase;
+use Drupal\FunctionalJavascriptTests\WebDriverTestBase;
 
 /**
  * Test that "create users" able users can notify users about the new account.
  *
  * @group create_user_permission
  */
-class CanNotifyTest extends JavascriptTestBase {
+class CanNotifyTest extends WebDriverTestBase {
 
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['create_user_permission'];
+  protected $defaultTheme = 'stark';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['create_user_permission'];
 
   /**
    * Test that we can check the "notify user" checkbox.