Mock focus-trap to prevent flakiness in unit tests involving Modal

config_frontend/__mocks__/focus-trap.js

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+/*
+Copyright 2020 The Tekton Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// prevent flakiness in tests involving Carbon Modal
+// https://github.com/tektoncd/dashboard/issues/907
+
+module.exports = () => ({
+  activate: () => {},
+  deactivate: () => {},
+  pause: () => {},
+  unpause: () => {},
+  addListeners: () => {},
+  removeListeners: () => {},
+  getNodeForOption: () => {},
+  getInitialFocusNode: () => {},
+  getReturnFocusNode: () => {},
+  checkPointerDown: () => {},
+  checkFocusIn: () => {},
+  checkKey: () => {},
+  checkTab: () => {},
+  checkClick: () => {},
+  updateTabbableNodes: () => {},
+  tryFocus: () => {}
+});