fix

swagger-main/swagger-editor/test/setupTests.js

@@ -0,0 +1,11 @@
+/* eslint-disable import/no-extraneous-dependencies */
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';
+
+// https://medium.com/hired-engineering/setting-up-monaco-with-jest-e1e4c963ac
+import 'jest-canvas-mock';
+
+document.queryCommandSupported = () => false;