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));
    }

}