Merge branch 'master' into update-todo-in-uiupdate-todo-in-ui

* master: (435 commits)
  Change occurrence of Sidekiq::Testing.inline!
  Fix order-dependent spec failure in appearance_spec.rb
  Put a failed example from appearance_spec in quarantine
  Cache PerformanceBar.allowed_user_ids list locally and in Redis
  Add Grafana to Admin > Monitoring menu when enabled
  Add changelog entry
  Add salesforce logo
  Move error_tracking_frontend specs to Jest
  Only save Peek session in Redis when Peek is enabled
  Migrate markdown header_spec.js to Jest
  Fix golint command in Go guide doc to be recursive
  Move images to their own dirs
  Gitlab -> GitLab
  Re-align CE and EE API docs
  Rename Release groups in issue_workflow.md
  Update api docs to finish aligning EE and CE docs
  Update locale.pot
  Update TODO: allow_collaboration column renaming
  Show upcoming status for releases
  Rebased and squashed commits
  ...

1 files changed, 19 insertions, 0 deletions

diff --git a/spec/frontend/test_setup.js b/spec/frontend/test_setup.js
index 7e7cc1488b8..15cf18700ed 100644
--- a/spec/frontend/test_setup.js
+++ b/spec/frontend/test_setup.js
@@ -1,10 +1,17 @@
 import Vue from 'vue';
 import * as jqueryMatchers from 'custom-jquery-matchers';
+import $ from 'jquery';
 import Translate from '~/vue_shared/translate';
 import axios from '~/lib/utils/axios_utils';
+import { config as testUtilsConfig } from '@vue/test-utils';
 import { initializeTestTimeout } from './helpers/timeout';
 import { loadHTMLFixture, setHTMLFixture } from './helpers/fixtures';
 
+// Expose jQuery so specs using jQuery plugins can be imported nicely.
+// Here is an issue to explore better alternatives:
+// https://gitlab.com/gitlab-org/gitlab-ee/issues/12448
+window.jQuery = $;
+
 process.on('unhandledRejection', global.promiseRejectionHandler);
 
 afterEach(() =>
@@ -54,9 +61,21 @@ Object.assign(global, {
   preloadFixtures() {},
 });
 
+Object.assign(global, {
+  MutationObserver() {
+    return {
+      disconnect() {},
+      observe() {},
+    };
+  },
+});
+
 // custom-jquery-matchers was written for an old Jest version, we need to make it compatible
 Object.entries(jqueryMatchers).forEach(([matcherName, matcherFactory]) => {
   expect.extend({
     [matcherName]: matcherFactory().compare,
   });
 });
+
+// Tech debt issue TBD
+testUtilsConfig.logModifiedComponents = false;