Move error into class init

Author: Jack Pope

packages/react-test-renderer/__tests__/shallow-test.js

@@ -10,9 +10,11 @@
 'use strict';
 
 describe('shallow', () => {
-  it('throws an error on import', () => {
+  it('throws an error on init', () => {
+    const ReactShallowRenderer = require('../shallow.js').default;
     expect(() => {
-      require('../shallow.js');
+      // eslint-disable-next-line no-new
+      new ReactShallowRenderer();
     }).toThrow(
       'react-test-renderer is deprecated. To use react-test-renderer/shallow, import react-shallow-renderer directly. See https://react.dev/warnings/react-test-renderer'
     );

packages/react-test-renderer/npm/shallow.js

@@ -1,5 +1,9 @@
 'use strict';
 
-throw new Error(
-  'react-test-renderer is deprecated. To use react-test-renderer/shallow, import react-shallow-renderer directly. See https://react.dev/warnings/react-test-renderer'
-);
+function ReactShallowRenderer() {
+  throw new Error(
+    'react-test-renderer is deprecated. To use react-test-renderer/shallow, import react-shallow-renderer directly. See https://react.dev/warnings/react-test-renderer'
+  );
+}
+
+module.exports = ReactShallowRenderer;

packages/react-test-renderer/shallow.js

@@ -7,5 +7,5 @@
  * @flow
  */
 
-import * as ReactShallowRenderer from './npm/shallow.js';
-export {ReactShallowRenderer as default};
+import ReactShallowRenderer from './npm/shallow.js';
+export default ReactShallowRenderer;