class StateTest

class StateTest extends UnitTestCase {
  
  /**
   * @covers ::__construct
   * @covers ::id
   * @covers ::label
   * @covers ::weight
   */
  public function testGetters() : void {
    $state = new State($this->prophesize(WorkflowTypeInterface::class)
      ->reveal(), 'draft', 'Draft', 3);
    $this->assertEquals('draft', $state->id());
    $this->assertEquals('Draft', $state->label());
    $this->assertEquals(3, $state->weight());
  }
  
  /**
   * @covers ::canTransitionTo
   */
  public function testCanTransitionTo() : void {
    $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() : void {
    $workflow_type = new TestType([], '', []);
    $workflow_type->addState('draft', 'Draft')
      ->addState('published', 'Published')
      ->addTransition('publish', 'Publish', [
      'draft',
    ], 'published');
    $state = $workflow_type->getState('draft');
    $transition = $state->getTransitionTo('published');
    $this->assertEquals('Publish', $transition->label());
  }
  
  /**
   * @covers ::getTransitionTo
   */
  public function testGetTransitionToException() : void {
    $this->expectException(\InvalidArgumentException::class);
    $this->expectExceptionMessage("Can not transition to 'published' state");
    $workflow_type = new TestType([], '', []);
    $workflow_type->addState('draft', 'Draft');
    $state = $workflow_type->getState('draft');
    $state->getTransitionTo('published');
  }
  
  /**
   * @covers ::getTransitions
   */
  public function testGetTransitions() : void {
    $workflow_type = new TestType([], '', []);
    $workflow_type->addState('draft', 'Draft')
      ->addState('published', 'Published')
      ->addState('archived', 'Archived')
      ->addTransition('create_new_draft', 'Create new draft', [
      'draft',
    ], 'draft')
      ->addTransition('publish', 'Publish', [
      'draft',
    ], 'published')
      ->addTransition('archive', 'Archive', [
      'published',
    ], 'archived');
    $state = $workflow_type->getState('draft');
    $transitions = $state->getTransitions();
    $this->assertCount(2, $transitions);
    $this->assertEquals('Create new draft', $transitions['create_new_draft']->label());
    $this->assertEquals('Publish', $transitions['publish']->label());
  }
  
  /**
   * @covers ::labelCallback
   */
  public function testLabelCallback() : void {
    $workflow_type = $this->prophesize(WorkflowTypeInterface::class)
      ->reveal();
    $states = [
      new State($workflow_type, 'draft', 'Draft'),
      new State($workflow_type, 'published', 'Published'),
    ];
    $this->assertEquals([
      'Draft',
      'Published',
    ], array_map([
      State::class,
      'labelCallback',
    ], $states));
  }

}