Add latest changes from gitlab-org/gitlab@13-5-stable-eev13.5.0-rc42

1 files changed, 10 insertions, 2 deletions

diff --git a/spec/frontend/environment.js b/spec/frontend/environment.js
index 35ca323f5a9..733bf4378eb 100644
--- a/spec/frontend/environment.js
+++ b/spec/frontend/environment.js
@@ -1,8 +1,8 @@
-/* eslint-disable import/no-commonjs */
+/* eslint-disable import/no-commonjs, max-classes-per-file */
 
 const path = require('path');
 const { ErrorWithStack } = require('jest-util');
-const JSDOMEnvironment = require('jest-environment-jsdom-sixteen');
+const JSDOMEnvironment = require('jest-environment-jsdom');
 const { TEST_HOST } = require('./helpers/test_constants');
 
 const ROOT_PATH = path.resolve(__dirname, '../..');
@@ -58,6 +58,14 @@ class CustomEnvironment extends JSDOMEnvironment {
       measure: () => null,
       getEntriesByName: () => [],
     });
+
+    this.global.PerformanceObserver = class {
+      /* eslint-disable no-useless-constructor, no-unused-vars, no-empty-function, class-methods-use-this */
+      constructor(callback) {}
+      disconnect() {}
+      observe(element, initObject) {}
+      /* eslint-enable no-useless-constructor, no-unused-vars, no-empty-function, class-methods-use-this */
+    };
   }
 
   async teardown() {