--- /dev/null
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\DateFormat;
+
+use Drupal\Core\Datetime\Entity\DateFormat;
+use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
+
+/**
+ * ResourceTestBase for DateFormat entity.
+ */
+abstract class DateFormatResourceTestBase extends EntityResourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = [];
+
+ /**
+ * {@inheritdoc}
+ */
+ protected static $entityTypeId = 'date_format';
+
+ /**
+ * The DateFormat entity.
+ *
+ * @var \Drupal\Core\Datetime\DateFormatInterface
+ */
+ protected $entity;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpAuthorization($method) {
+ $this->grantPermissionsToTestedRole(['administer site configuration']);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function createEntity() {
+ // Create a date format.
+ $date_format = DateFormat::create([
+ 'id' => 'llama',
+ 'label' => 'Llama',
+ 'pattern' => 'F d, Y',
+ ]);
+
+ $date_format->save();
+
+ return $date_format;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getExpectedNormalizedEntity() {
+ return [
+ 'dependencies' => [],
+ 'id' => 'llama',
+ 'label' => 'Llama',
+ 'langcode' => 'en',
+ 'locked' => FALSE,
+ 'pattern' => 'F d, Y',
+ 'status' => TRUE,
+ 'uuid' => $this->entity->uuid(),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getNormalizedPostEntity() {
+ // @todo Update in https://www.drupal.org/node/2300677.
+ }
+
+}