class DiscardLayoutChangesFormTest

class DiscardLayoutChangesFormTest extends UnitTestCase {
  
  /**
   * Tests ::getDescription() with entity, NULL, and ContextException cases.
   */
  public function testGetDescription() : void {
    $container = new ContainerBuilder();
    $container->set('string_translation', $this->getStringTranslationStub());
    \Drupal::setContainer($container);
    $form = new DiscardLayoutChangesForm($this->prophesize(LayoutTempstoreRepositoryInterface::class)
      ->reveal(), $this->prophesize(MessengerInterface::class)
      ->reveal());
    $reflection = new \ReflectionProperty(DiscardLayoutChangesForm::class, 'sectionStorage');
    $default = 'Any unsaved changes to the layout will be discarded. This action cannot be undone.';
    // Test entity label.
    $entity = $this->prophesize(EntityInterface::class);
    $entity->label()
      ->willReturn('My Node');
    $section_storage = $this->prophesize(SectionStorageInterface::class);
    $section_storage->getContextValue('entity')
      ->willReturn($entity->reveal());
    $reflection->setValue($form, $section_storage->reveal());
    $this->assertSame('Any unsaved changes to the layout for <em class="placeholder">My Node</em> will be discarded. This action cannot be undone.', (string) $form->getDescription());
    // Test NULL context.
    $section_storage = $this->prophesize(SectionStorageInterface::class);
    $section_storage->getContextValue('entity')
      ->willReturn(NULL);
    $reflection->setValue($form, $section_storage->reveal());
    $this->assertSame($default, (string) $form->getDescription());
    // Test exception.
    $section_storage = $this->prophesize(SectionStorageInterface::class);
    $section_storage->getContextValue('entity')
      ->willThrow(new ContextException());
    $reflection->setValue($form, $section_storage->reveal());
    $this->assertSame($default, (string) $form->getDescription());
  }

}