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<?php
declare(strict_types=1);
namespace Drupal\Tests;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Render\Element;
/**
* Provides helper methods to deal with building entity views in tests.
*/
trait EntityViewTrait {
/**
* Builds the renderable view of an entity.
*
* Entities postpone the composition of their renderable arrays to #pre_render
* functions in order to maximize cache efficacy. This means that the full
* renderable array for an entity is constructed in
* \Drupal::service('renderer')->render(). Some tests require the complete
* renderable array for an entity outside of the render process in order to
* verify the presence of specific values. This method isolates the steps in
* the render process that produce an entity's renderable array.
*
* @param \Drupal\Core\Entity\EntityInterface $entity
* The entity to prepare a renderable array for.
* @param string $view_mode
* (optional) The view mode that should be used to build the entity.
* @param null $langcode
* (optional) For which language the entity should be prepared, defaults to
* the current content language.
*
* @return array
* The fully built render array of the entity.
*
* @see \Drupal\Core\Render\RendererInterface::render()
*/
protected function buildEntityView(EntityInterface $entity, $view_mode = 'full', $langcode = NULL) {
$ensure_fully_built = function (&$elements) use (&$ensure_fully_built) {
// If the default values for this element have not been loaded yet,
// populate them.
if (isset($elements['#type']) && empty($elements['#defaults_loaded'])) {
$elements += \Drupal::service('element_info')->getInfo($elements['#type']);
}
// Make any final changes to the element before it is rendered. This means
// that the $element or the children can be altered or corrected before
// the element is rendered into the final text.
if (isset($elements['#pre_render'])) {
foreach ($elements['#pre_render'] as $callable) {
$elements = call_user_func($callable, $elements);
}
}
// And recurse.
$children = Element::children($elements, TRUE);
foreach ($children as $key) {
$ensure_fully_built($elements[$key]);
}
};
$render_controller = $this->container->get('entity_type.manager')->getViewBuilder($entity->getEntityTypeId());
$build = $render_controller->view($entity, $view_mode, $langcode);
$ensure_fully_built($build);
return $build;
}
}
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