class StateTransitionValidationTest

class StateTransitionValidationTest extends UnitTestCase {
    
    /**
     * A test workflow.
     *
     * @var \Drupal\workflows\WorkflowInterface
     */
    protected $workflow;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create a container so that the plugin manager and workflow type can be
        // mocked.
        $container = new ContainerBuilder();
        $workflow_manager = $this->prophesize(WorkflowTypeManager::class);
        $workflow_manager->createInstance('content_moderation', Argument::any())
            ->willReturn(new TestType([], '', []));
        $container->set('plugin.manager.workflows.type', $workflow_manager->reveal());
        \Drupal::setContainer($container);
        $this->workflow = new Workflow([
            'id' => 'process',
            'type' => 'content_moderation',
        ], 'workflow');
        $this->workflow
            ->getTypePlugin()
            ->addState('draft', 'draft')
            ->addState('needs_review', 'needs_review')
            ->addState('published', 'published')
            ->addTransition('draft', 'draft', [
            'draft',
        ], 'draft')
            ->addTransition('review', 'review', [
            'draft',
        ], 'needs_review')
            ->addTransition('publish', 'publish', [
            'needs_review',
            'published',
        ], 'published');
    }
    
    /**
     * Verifies user-aware transition validation.
     *
     * @param string $from_id
     *   The state to transition from.
     * @param string $to_id
     *   The state to transition to.
     * @param string $permission
     *   The permission to give the user, or not.
     * @param bool $allowed
     *   Whether or not to grant a user this permission.
     * @param bool $result
     *   Whether getValidTransitions() is expected to have the.
     *
     * @dataProvider userTransitionsProvider
     */
    public function testUserSensitiveValidTransitions($from_id, $to_id, $permission, $allowed, $result) : void {
        $user = $this->prophesize(AccountInterface::class);
        // The one listed permission will be returned as instructed; Any others are
        // always denied.
        $user->hasPermission($permission)
            ->willReturn($allowed);
        $user->hasPermission(Argument::type('string'))
            ->willReturn(FALSE);
        $entity = $this->prophesize(ContentEntityInterface::class);
        $entity = $entity->reveal();
        $entity->moderation_state = new \stdClass();
        $entity->moderation_state->value = $from_id;
        $moderation_info = $this->prophesize(ModerationInformationInterface::class);
        $moderation_info->getWorkflowForEntity($entity)
            ->willReturn($this->workflow);
        $validator = new StateTransitionValidation($moderation_info->reveal());
        $has_transition = FALSE;
        foreach ($validator->getValidTransitions($entity, $user->reveal()) as $transition) {
            if ($transition->to()
                ->id() === $to_id) {
                $has_transition = TRUE;
                break;
            }
        }
        $this->assertSame($result, $has_transition);
    }
    
    /**
     * Data provider for the user transition test.
     */
    public static function userTransitionsProvider() {
        // The user has the right permission, so let it through.
        $ret[] = [
            'draft',
            'draft',
            'use process transition draft',
            TRUE,
            TRUE,
        ];
        // The user doesn't have the right permission, block it.
        $ret[] = [
            'draft',
            'draft',
            'use process transition draft',
            FALSE,
            FALSE,
        ];
        // The user has some other permission that doesn't matter.
        $ret[] = [
            'draft',
            'draft',
            'use process transition review',
            TRUE,
            FALSE,
        ];
        return $ret;
    }

}