class UserPermissionsAdminTest

class UserPermissionsAdminTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests granting and revoking permissions via the UI sorts permissions.
     */
    public function testPermissionsSorting() {
        $role = Role::create([
            'id' => 'test_role',
            'label' => 'Test role',
        ]);
        // Start the role with a permission that is near the end of the alphabet.
        $role->grantPermission('view user email addresses');
        $role->save();
        $this->drupalLogin($this->drupalCreateUser([
            'administer permissions',
        ]));
        $this->drupalGet('admin/people/permissions');
        $this->assertSession()
            ->statusCodeEquals(200);
        // Add a permission that is near the start of the alphabet.
        $this->submitForm([
            'test_role[change own username]' => 1,
        ], 'Save permissions');
        // Check that permissions are sorted alphabetically.
        $storage = \Drupal::entityTypeManager()->getStorage('user_role');
        
        /** @var \Drupal\user\Entity\Role $role */
        $role = $storage->loadUnchanged($role->id());
        $this->assertEquals([
            'change own username',
            'view user email addresses',
        ], $role->getPermissions());
        // Remove the first permission, resulting in a single permission in the first
        // key of the array.
        $this->submitForm([
            'test_role[change own username]' => 0,
        ], 'Save permissions');
        
        /** @var \Drupal\user\Entity\Role $role */
        $role = $storage->loadUnchanged($role->id());
        $this->assertEquals([
            'view user email addresses',
        ], $role->getPermissions());
    }

}