--- /dev/null
+<?php
+
+namespace Drupal\Tests\language\Functional\Rest;
+
+use Drupal\language\Entity\ContentLanguageSettings;
+use Drupal\node\Entity\NodeType;
+use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
+
+abstract class ContentLanguageSettingsResourceTestBase extends EntityResourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['language', 'node'];
+
+ /**
+ * {@inheritdoc}
+ */
+ protected static $entityTypeId = 'language_content_settings';
+
+ /**
+ * @var \Drupal\language\ContentLanguageSettingsInterface
+ */
+ protected $entity;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpAuthorization($method) {
+ $this->grantPermissionsToTestedRole(['administer languages']);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function createEntity() {
+ // Create a "Camelids" node type.
+ $camelids = NodeType::create([
+ 'name' => 'Camelids',
+ 'type' => 'camelids',
+ ]);
+ $camelids->save();
+
+ $entity = ContentLanguageSettings::create([
+ 'target_entity_type_id' => 'node',
+ 'target_bundle' => 'camelids',
+ ]);
+ $entity->setDefaultLangcode('site_default')
+ ->save();
+
+ return $entity;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getExpectedNormalizedEntity() {
+ return [
+ 'default_langcode' => 'site_default',
+ 'dependencies' => [
+ 'config' => [
+ 'node.type.camelids',
+ ],
+ ],
+ 'id' => 'node.camelids',
+ 'langcode' => 'en',
+ 'language_alterable' => FALSE,
+ 'status' => TRUE,
+ 'target_bundle' => 'camelids',
+ 'target_entity_type_id' => 'node',
+ 'uuid' => $this->entity->uuid(),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getNormalizedPostEntity() {
+ // @todo Update in https://www.drupal.org/node/2300677.
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getExpectedCacheContexts() {
+ return [
+ 'languages:language_interface',
+ 'user.permissions',
+ ];
+ }
+
+}