Update to Drupal 8.0.5. For more information, see https://www.drupal.org/node/2679347

core/modules/rest/src/Tests/AuthTest.php

@@ -74,7 +74,7 @@ class AuthTest extends RESTTestBase {
    * set curl settings for basic authentication.
    *
    * @param \Drupal\Core\Url $url
-   *   An Url object.
+   *   A Url object.
    * @param string $username
    *   The user name to authenticate with.
    * @param string $password

core/modules/rest/src/Tests/CreateTest.php

@@ -199,8 +199,8 @@ class CreateTest extends RESTTestBase {
       }
       else {
         // Changed and revision_timestamp fields can never be added.
-        unset($entity->changed);
-        unset($entity->revision_timestamp);
+        $entity->set('changed', NULL);
+        $entity->set('revision_timestamp', NULL);
       }
 
       $serialized = $this->serializer->serialize($entity, $this->defaultFormat, ['account' => $account]);
@@ -299,7 +299,7 @@ class CreateTest extends RESTTestBase {
       }
 
       // Changed field can never be added.
-      unset($entity->changed);
+      $entity->set('changed', NULL);
 
       $serialized = $this->serializer->serialize($entity, $this->defaultFormat, ['account' => $account]);
 

core/modules/rest/src/Tests/PageCacheTest.php

@@ -33,6 +33,7 @@ class PageCacheTest extends RESTTestBase {
 
     // Create an entity programmatically.
     $entity = $this->entityCreate('entity_test');
+    $entity->set('field_test_text', 'custom cache tag value');
     $entity->save();
     // Read it over the REST API.
     $this->httpRequest($entity->urlInfo()->setRouteParameter('_format', $this->defaultFormat), 'GET', NULL, $this->defaultMimeType);
@@ -40,6 +41,7 @@ class PageCacheTest extends RESTTestBase {
     $this->assertHeader('x-drupal-cache', 'MISS');
     $this->assertCacheTag('config:rest.settings');
     $this->assertCacheTag('entity_test:1');
+    $this->assertCacheTag('entity_test_access:field_test_text');
 
     // Read it again, should be page-cached now.
     $this->httpRequest($entity->urlInfo()->setRouteParameter('_format', $this->defaultFormat), 'GET', NULL, $this->defaultMimeType);
@@ -47,6 +49,7 @@ class PageCacheTest extends RESTTestBase {
     $this->assertHeader('x-drupal-cache', 'HIT');
     $this->assertCacheTag('config:rest.settings');
     $this->assertCacheTag('entity_test:1');
+    $this->assertCacheTag('entity_test_access:field_test_text');
 
     // Trigger a config save which should clear the page cache, so we should get
     // a cache miss now for the same request.
@@ -56,6 +59,7 @@ class PageCacheTest extends RESTTestBase {
     $this->assertHeader('x-drupal-cache', 'MISS');
     $this->assertCacheTag('config:rest.settings');
     $this->assertCacheTag('entity_test:1');
+    $this->assertCacheTag('entity_test_access:field_test_text');
   }
 
 }

core/modules/rest/src/Tests/ResourceTest.php

@@ -6,6 +6,8 @@
  */
 
 namespace Drupal\rest\Tests;
+
+use Drupal\Component\Plugin\Exception\PluginNotFoundException;
 use Drupal\Core\Session\AccountInterface;
 use Drupal\user\Entity\Role;
 
@@ -121,4 +123,30 @@ class ResourceTest extends RESTTestBase {
     }
   }
 
+  /**
+   * Tests that a resource with a missing plugin does not cause an exception.
+   */
+  public function testMissingPlugin() {
+    $settings = array(
+      'entity:nonexisting' => array(
+        'GET' => array(
+          'supported_formats' => array(
+            'hal_json',
+          ),
+        ),
+      ),
+    );
+
+    try {
+      // Attempt to enable the resource.
+      $this->config->set('resources', $settings);
+      $this->config->save();
+      $this->rebuildCache();
+      $this->pass('rest.settings referencing a missing REST resource plugin does not cause an exception.');
+    }
+    catch (PluginNotFoundException $e) {
+      $this->fail('rest.settings referencing a missing REST resource plugin caused an exception.');
+    }
+  }
+
 }

core/modules/rest/src/Tests/UpdateTest.php

@@ -52,7 +52,7 @@ class UpdateTest extends RESTTestBase {
     ));
     $patch_entity = entity_create($entity_type, $patch_values);
     // We don't want to overwrite the UUID.
-    unset($patch_entity->uuid);
+    $patch_entity->set('uuid', NULL);
     $serialized = $serializer->serialize($patch_entity, $this->defaultFormat, $context);
 
     // Update the entity over the REST API.