fix: add an explicit dependency on ts-jest to get tests passing

example/index.js

@@ -1,5 +1,3 @@
-import 'babel-polyfill';
-
 import React from 'react';
 import ReactDOM from 'react-dom';
 import { initialize, getConfig, subscribe, APP_READY } from '@edx/frontend-platform';

package.json

@@ -40,7 +40,7 @@
     "@testing-library/jest-dom": "5.17.0",
     "@testing-library/react": "^16.2.0",
     "jest": "30.0.4",
-    "jest-chain": "1.1.6",
+    "jest-environment-jsdom": "^30.0.0",
     "prop-types": "15.8.1",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
@@ -48,7 +48,8 @@
     "react-router-dom": "6.30.1",
     "react-test-renderer": "^18.3.1",
     "redux": "4.2.1",
-    "redux-saga": "1.3.0"
+    "redux-saga": "1.3.0",
+    "ts-jest": "^29.4.0"
   },
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "6.7.2",
@@ -57,10 +58,7 @@
     "@fortawesome/free-solid-svg-icons": "6.7.2",
     "@fortawesome/react-fontawesome": "^0.2.0",
     "@openedx/frontend-plugin-framework": "^1.7.0",
-    "axios-mock-adapter": "1.22.0",
-    "babel-polyfill": "6.26.0",
     "classnames": "^2.5.1",
-    "jest-environment-jsdom": "^30.0.0",
     "react-responsive": "8.2.0",
     "react-transition-group": "4.4.5"
   },

src/Header.test.jsx

@@ -33,6 +33,7 @@ describe('<Header />', () => {
     };
     const component = <HeaderComponent width={{ width: 1280 }} contextValue={contextValue} />;
 
+    // FIXME: react-test-renderer is deprecated. Convert to @testing-library/react.
     const wrapper = TestRenderer.create(component);
 
     expect(wrapper.toJSON()).toMatchSnapshot();
@@ -56,6 +57,7 @@ describe('<Header />', () => {
     };
     const component = <HeaderComponent width={{ width: 1280 }} contextValue={contextValue} />;
 
+    // FIXME: react-test-renderer is deprecated. Convert to @testing-library/react.
     const wrapper = TestRenderer.create(component);
 
     expect(wrapper.toJSON()).toMatchSnapshot();
@@ -74,6 +76,7 @@ describe('<Header />', () => {
     };
     const component = <HeaderComponent width={{ width: 500 }} contextValue={contextValue} />;
 
+    // FIXME: react-test-renderer is deprecated. Convert to @testing-library/react.
     const wrapper = TestRenderer.create(component);
 
     expect(wrapper.toJSON()).toMatchSnapshot();

src/setupTest.js

@@ -4,8 +4,6 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import '@testing-library/jest-dom';
 import '@testing-library/jest-dom/extend-expect';
-import 'babel-polyfill';
-import 'jest-chain';
 import { getConfig, mergeConfig } from '@edx/frontend-platform';
 import { configure as configureLogging } from '@edx/frontend-platform/logging';
 import { configure as configureI18n } from '@edx/frontend-platform/i18n';