only in patch2:
unchanged:
--- a/core/modules/system/src/Tests/Menu/MenuTreeStorageTest.php
+++ b/core/modules/system/src/Tests/Menu/MenuTreeStorageTest.php
@@ -76,7 +76,7 @@ protected function doTestTable() {
     // that selecting from the storage creates the table.
     $tree_storage = new MenuTreeStorage($this->container->get('database'), $this->container->get('cache.menu'), 'test_menu_tree');
     $this->assertFalse($this->connection->schema()->tableExists('test_menu_tree'), 'Test table is not yet created');
-    $tree_storage->countMenuLinks();
+    $tree_storage->save($this->getLinkArray($this->randomMachineName()));
     $this->assertTrue($this->connection->schema()->tableExists('test_menu_tree'), 'Test table was created');
   }
 
@@ -329,17 +329,7 @@ public function testLoadByProperties() {
    * Adds a link with the given ID and supply defaults.
    */
   protected function addMenuLink($id, $parent = '', $route_name = 'test', $route_parameters = array(), $menu_name = 'tools', $extra = array()) {
-    $link = array(
-      'id' => $id,
-      'menu_name' => $menu_name,
-      'route_name' => $route_name,
-      'route_parameters' => $route_parameters,
-      'title_arguments' => array(),
-      'title' => 'test',
-      'parent' => $parent,
-      'options' => array(),
-      'metadata' => array(),
-    ) + $extra;
+    $link = $this->getLinkArray($id, $parent, $route_name, $route_parameters, $menu_name) + $extra;
     $this->treeStorage->save($link);
   }
 
@@ -412,4 +402,26 @@ protected function assertMenuLink($id, array $expected_properties, array $parent
     $this->assertEqual(array_intersect($children, $found_children), $children, 'Child IDs match');
   }
 
+  /**
+   * @param $id
+   * @param $parent
+   * @param $route_name
+   * @param $route_parameters
+   * @param $menu_name
+   * @return array
+   */
+  protected function getLinkArray($id, $parent = '', $route_name = 'test', $route_parameters = array(), $menu_name = 'tools') {
+    return array(
+      'id' => $id,
+      'menu_name' => $menu_name,
+      'route_name' => $route_name,
+      'route_parameters' => $route_parameters,
+      'title_arguments' => array(),
+      'title' => 'test',
+      'parent' => $parent,
+      'options' => array(),
+      'metadata' => array(),
+    );
+  }
+
 }