.../MediaType/MediaTypeHalJsonAnonTest.php         | 30 +++++++
 .../MediaType/MediaTypeHalJsonBasicAuthTest.php    | 35 +++++++++
 .../MediaType/MediaTypeHalJsonCookieTest.php       | 35 +++++++++
 .../MediaType/MediaTypeJsonAnonTest.php            | 24 ++++++
 .../MediaType/MediaTypeJsonBasicAuthTest.php       | 34 ++++++++
 .../MediaType/MediaTypeJsonCookieTest.php          | 29 +++++++
 .../MediaType/MediaTypeResourceTestBase.php        | 91 ++++++++++++++++++++++
 7 files changed, 278 insertions(+)

diff --git a/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonAnonTest.php b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonAnonTest.php
new file mode 100644
index 0000000..1b83df1
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonAnonTest.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\MediaType\MediaTypeResourceTestBase;
+
+/**
+ * @group hal
+ */
+class MediaTypeHalJsonAnonTest extends MediaTypeResourceTestBase {
+
+  use AnonResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['hal'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'hal_json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/hal+json';
+
+}
diff --git a/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonBasicAuthTest.php b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonBasicAuthTest.php
new file mode 100644
index 0000000..20c29f2
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonBasicAuthTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\MediaType\MediaTypeResourceTestBase;
+
+/**
+ * @group hal
+ */
+class MediaTypeHalJsonBasicAuthTest extends MediaTypeResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['hal', 'basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'hal_json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/hal+json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+}
diff --git a/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonCookieTest.php b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonCookieTest.php
new file mode 100644
index 0000000..8c60485
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/MediaType/MediaTypeHalJsonCookieTest.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\MediaType\MediaTypeResourceTestBase;
+
+/**
+ * @group hal
+ */
+class MediaTypeHalJsonCookieTest extends MediaTypeResourceTestBase {
+
+  use CookieResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['hal'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'hal_json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/hal+json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonAnonTest.php b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonAnonTest.php
new file mode 100644
index 0000000..2e4b630
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonAnonTest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class MediaTypeJsonAnonTest extends MediaTypeResourceTestBase {
+
+  use AnonResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonBasicAuthTest.php b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonBasicAuthTest.php
new file mode 100644
index 0000000..052b19d
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonBasicAuthTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class MediaTypeJsonBasicAuthTest extends MediaTypeResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonCookieTest.php b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonCookieTest.php
new file mode 100644
index 0000000..b956c98
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeJsonCookieTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\MediaType;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class MediaTypeJsonCookieTest extends MediaTypeResourceTestBase {
+
+  use CookieResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeResourceTestBase.php
new file mode 100644
index 0000000..ebff62c
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/MediaType/MediaTypeResourceTestBase.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\MediaType;
+
+use Drupal\media\Entity\MediaType;
+use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
+
+abstract class MediaTypeResourceTestBase extends EntityResourceTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['media'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $entityTypeId = 'media_type';
+
+  /**
+   * The NodeType entity.
+   *
+   * @var \Drupal\node\NodeTypeInterface
+   */
+  protected $entity;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUpAuthorization($method) {
+    $this->grantPermissionsToTestedRole(['administer media types']);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function createEntity() {
+    // Create a "Camelids" media type.
+    $camelids = MediaType::create([
+      'name' => 'Camelids',
+      'id' => 'camelids',
+      'description' => 'Camelids are large, strictly herbivorous animals with slender necks and long legs.',
+      'source' => 'file',
+    ]);
+
+    $camelids->save();
+
+    return $camelids;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedNormalizedEntity() {
+    return [
+      'dependencies' => [],
+      'description' => 'Camelids are large, strictly herbivorous animals with slender necks and long legs.',
+      'field_map' => [],
+      'id' => 'camelids',
+      'label' => NULL,
+      'langcode' => 'en',
+      'new_revision' => FALSE,
+      'queue_thumbnail_downloads' => FALSE,
+      'source' => 'file',
+      'source_configuration' => [
+        'source_field' => '',
+      ],
+      'status' => TRUE,
+      'uuid' => $this->entity->uuid(),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getNormalizedPostEntity() {
+    // @todo Update in https://www.drupal.org/node/2300677.
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedUnauthorizedAccessMessage($method) {
+    if ($this->config('rest.settings')->get('bc_entity_resource_permissions')) {
+      return parent::getExpectedUnauthorizedAccessMessage($method);
+    }
+
+    return "The 'administer media types' permission is required.";
+  }
+
+}