class EntityFormBuilderTest

class EntityFormBuilderTest extends UnitTestCase {
  
  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $entityTypeManager;
  
  /**
   * The form builder.
   *
   * @var \Drupal\Core\Form\FormBuilderInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $formBuilder;
  
  /**
   * The entity form builder.
   *
   * @var \Drupal\Core\Entity\EntityFormBuilderInterface
   */
  protected $entityFormBuilder;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->formBuilder = $this->createMock('Drupal\\Core\\Form\\FormBuilderInterface');
    $this->entityTypeManager = $this->createMock('Drupal\\Core\\Entity\\EntityTypeManagerInterface');
    $this->entityFormBuilder = new EntityFormBuilder($this->entityTypeManager, $this->formBuilder);
  }
  
  /**
   * Tests the getForm() method.
   *
   * @covers ::getForm
   */
  public function testGetForm() : void {
    $form_controller = $this->createMock('Drupal\\Core\\Entity\\EntityFormInterface');
    $form_controller->expects($this->any())
      ->method('getFormId')
      ->willReturn('the_form_id');
    $this->entityTypeManager
      ->expects($this->any())
      ->method('getFormObject')
      ->with('the_entity_type', 'default')
      ->willReturn($form_controller);
    $this->formBuilder
      ->expects($this->once())
      ->method('buildForm')
      ->with($form_controller, $this->isInstanceOf('Drupal\\Core\\Form\\FormStateInterface'))
      ->willReturn('the form contents');
    $entity = $this->createMock('Drupal\\Core\\Entity\\EntityInterface');
    $entity->expects($this->once())
      ->method('getEntityTypeId')
      ->willReturn('the_entity_type');
    $this->assertSame('the form contents', $this->entityFormBuilder
      ->getForm($entity));
  }

}