canTransitionTo example

$this->clickLink('Add workflow');
    $this->submitForm(['label' => 'Test', 'id' => 'test', 'workflow_type' => 'workflow_type_test'], 'Save');
    $this->assertSession()->pageTextContains('Created the Test Workflow.');
    $this->assertSession()->addressEquals('admin/config/workflow/workflows/manage/test/add_state');
    $this->drupalGet('/admin/config/workflow/workflows/manage/test');
    $this->assertSession()->pageTextContains('This workflow has no states and will be disabled until there is at least one, add a new state.');
    $this->assertSession()->pageTextContains('There are no states yet.');
    $this->clickLink('Add a new state');
    $this->submitForm(['label' => 'Published', 'id' => 'published'], 'Save');
    $this->assertSession()->pageTextContains('Created Published state.');
    $workflow = $workflow_storage->loadUnchanged('test');
    $this->assertFalse($workflow->getTypePlugin()->getState('published')->canTransitionTo('published'), 'No default transition from published to published exists.');

    $this->clickLink('Add a new state');
    // Don't create a draft to draft transition by default.     $this->submitForm(['label' => 'Draft', 'id' => 'draft'], 'Save');
    $this->assertSession()->pageTextContains('Created Draft state.');
    $workflow = $workflow_storage->loadUnchanged('test');
    $this->assertFalse($workflow->getTypePlugin()->getState('draft')->canTransitionTo('draft'), 'Can not transition from draft to draft');

    $this->clickLink('Add a new transition');
    $this->submitForm(['id' => 'publish', 'label' => 'Publish', 'from[draft]' => 'draft', 'to' => 'published'], 'Save');
    $this->assertSession()->pageTextContains('Created Publish transition.');
    

'%state' => $entity->moderation_state->value,
        '%workflow' => $workflow->label(),
      ]);
      return;
    }

    $new_state = $workflow->getTypePlugin()->getState($entity->moderation_state->value);
    $original_state = $this->moderationInformation->getOriginalState($entity);

    // If a new state is being set and there is an existing state, validate     // there is a valid transition between them.     if (!$original_state->canTransitionTo($new_state->id())) {
      $this->context->addViolation($constraint->message, [
        '%from' => $original_state->label(),
        '%to' => $new_state->label(),
      ]);
    }
    else {
      // If we're sure the transition exists, make sure the user has permission       // to use it.       if (!$this->stateTransitionValidation->isTransitionValid($workflow, $original_state, $new_state, $this->currentUser, $entity)) {
        $this->context->addViolation($constraint->invalidTransitionAccess, [
          '%original_state' => $original_state->label(),
          

/** * @covers ::canTransitionTo */
  public function testCanTransitionTo() {
    $workflow_type = new TestType([], '', []);
    $workflow_type
      ->addState('draft', 'Draft')
      ->addState('published', 'Published')
      ->addTransition('publish', 'Publish', ['draft'], 'published');
    $state = $workflow_type->getState('draft');
    $this->assertTrue($state->canTransitionTo('published'));
    $this->assertFalse($state->canTransitionTo('some_other_state'));

    $workflow_type->deleteTransition('publish');
    $this->assertFalse($state->canTransitionTo('published'));
  }

  /** * @covers ::getTransitionTo */
  public function testGetTransitionTo() {
    $workflow_type = new TestType([], '', []);
    

->addState('published', 'Published')
      ->addState('archived', 'Archived')
      ->addTransition('create_new_draft', 'Create new draft', ['draft'], 'draft')
      ->addTransition('publish', 'Publish', ['draft'], 'published');

    // Ensure we're returning state objects and they are set up correctly     $this->assertInstanceOf(State::class, $workflow->getTypePlugin()->getState('draft'));
    $this->assertEquals('archived', $workflow->getTypePlugin()->getState('archived')->id());
    $this->assertEquals('Archived', $workflow->getTypePlugin()->getState('archived')->label());

    $draft = $workflow->getTypePlugin()->getState('draft');
    $this->assertTrue($draft->canTransitionTo('draft'));
    $this->assertTrue($draft->canTransitionTo('published'));
    $this->assertFalse($draft->canTransitionTo('archived'));
    $this->assertEquals('Publish', $draft->getTransitionTo('published')->label());
    $this->assertEquals(0, $draft->weight());
    $this->assertEquals(1, $workflow->getTypePlugin()->getState('published')->weight());
    $this->assertEquals(2, $workflow->getTypePlugin()->getState('archived')->weight());
  }

  /** * @covers ::getState */
  

/** * {@inheritdoc} */
  public function weight() {
    return $this->state->weight();
  }

  /** * {@inheritdoc} */
  public function canTransitionTo($to_state_id) {
    return $this->state->canTransitionTo($to_state_id);
  }

  /** * {@inheritdoc} */
  public function getTransitionTo($to_state_id) {
    return $this->state->getTransitionTo($to_state_id);
  }

  /** * {@inheritdoc} */

/** * {@inheritdoc} */
  public function canTransitionTo($to_state_id) {
    return $this->workflow->hasTransitionFromStateToState($this->id, $to_state_id);
  }

  /** * {@inheritdoc} */
  public function getTransitionTo($to_state_id) {
    if (!$this->canTransitionTo($to_state_id)) {
      throw new \InvalidArgumentException("Can not transition to '$to_state_id' state");
    }
    return $this->workflow->getTransitionFromStateToState($this->id(), $to_state_id);
  }

  /** * {@inheritdoc} */
  public function getTransitions() {
    return $this->workflow->getTransitionsForState($this->id);
  }