only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Block/SystemMenuBlockTest.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * Contains \Drupal\system\Tests\Block\SystemMenuBlockTest
+ */
+
+namespace Drupal\system\Tests\Block;
+
+use Drupal\simpletest\DrupalUnitTestBase;
+
+/**
+ * Tests \Drupal\system\Plugin\Block\SystemMenuBlock
+ *
+ * @todo improve the test to include coverage of all SystemMenuBlock related
+ *   functionality. For example, block_menu_delete().
+ */
+class SystemMenuBlockTest extends DrupalUnitTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('system', 'menu_link', 'block');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'System menu block test',
+      'description' => 'Tests \Drupal\system\Plugin\Block\SystemMenuBlock.',
+      'group' => 'System blocks',
+    );
+  }
+
+  public function testSystemMenuBlockConfigDependencies() {
+    // Add a new custom menu.
+    $menu_name = $this->randomName(16);
+    $label = $this->randomName(16);
+
+    $menu = entity_create('menu', array(
+      'id' => $menu_name,
+      'label' => $label,
+      'description' => 'Description text',
+    ));
+    $menu->save();
+
+    $block = entity_create('block', array(
+      'plugin' => 'system_menu_block:'. $menu->id(),
+      'region' => 'footer',
+      'id' => 'machinename',
+      'theme' => 'stark',
+    ));
+
+    $dependencies = $block->calculateDependencies();
+    $expected = array(
+      'entity' => array(
+        'system.menu.' . $menu->id()
+      ),
+      'module' => array(
+        'system'
+      ),
+      'theme' => array(
+        'stark'
+      ),
+    );
+    $this->assertIdentical($expected, $dependencies);
+  }
+} 
\ No newline at end of file