Issue #3042198 by Wim Leers, tim.plunkett, phenaproxima: Add JSON:API...

Issue #3042198 by Wim Leers, tim.plunkett, phenaproxima: Add JSON:API integration test for LayoutBuilderEntityViewDisplay

core/modules/jsonapi/src/Normalizer/ResourceObjectNormalizer.php

@@ -95,6 +95,13 @@ protected function serializeField($field, array $context, $format) {
       return $normalized_field->withCacheableDependency(CacheableMetadata::createFromObject($field_access_result));
     }
     else {
+      // @todo Replace this workaround after https://www.drupal.org/node/3043245
+      //   or remove the need for this in https://www.drupal.org/node/2942975.
+      //   See \Drupal\layout_builder\Normalizer\LayoutEntityDisplayNormalizer.
+      if ($context['resource_object']->getResourceType()->getDeserializationTargetClass() === 'Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay' && $context['resource_object']->getField('third_party_settings') === $field) {
+        unset($field['layout_builder']['sections']);
+      }
+
       // Config "fields" in this case are arrays or primitives and do not need
       // to be normalized.
       return CacheableNormalization::permanent($field);

core/modules/layout_builder/tests/src/Functional/JsonApi/LayoutBuilderEntityViewDisplayTest.php

+<?php
+
+namespace Drupal\Tests\layout_builder\Functional\JsonApi;
+
+use Drupal\layout_builder\Plugin\SectionStorage\OverridesSectionStorage;
+use Drupal\Tests\jsonapi\Functional\EntityViewDisplayTest;
+
+/**
+ * JSON:API integration test for the "EntityViewDisplay" config entity type.
+ *
+ * @group jsonapi
+ * @group layout_builder
+ */
+class LayoutBuilderEntityViewDisplayTest extends EntityViewDisplayTest {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['layout_builder'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function createEntity() {
+    /** @var \Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay $entity */
+    $entity = parent::createEntity();
+    $entity
+      ->enableLayoutBuilder()
+      ->setOverridable()
+      ->save();
+    $this->assertCount(1, $entity->getThirdPartySetting('layout_builder', 'sections'));
+    return $entity;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedDocument() {
+    $document = parent::getExpectedDocument();
+    array_unshift($document['data']['attributes']['dependencies']['module'], 'layout_builder');
+    $document['data']['attributes']['hidden'][OverridesSectionStorage::FIELD_NAME] = TRUE;
+    $document['data']['attributes']['third_party_settings']['layout_builder'] = [
+      'enabled' => TRUE,
+      'allow_custom' => TRUE,
+    ];
+    return $document;
+  }
+
+}