Revert "Split Node.js 18 and Node.js 20+ tests in two files"

This reverts commit a20cb5c.

Author: nicolo-ribaudo

jest.config.mjs

@@ -68,9 +68,6 @@ export default {
     '/packages/jest-snapshot/src/__tests__/fixtures/',
     '/e2e/__tests__/iterator-to-null-test.ts',
     '/e2e/__tests__/tsIntegration.test.ts', // this test needs types to be build, it runs in a separate CI job through `jest.config.ts.mjs`
-    Number.parseInt(process.versions.node, 10) >= 20
-      ? '/.*\\.nodejs18\\..*'
-      : '/.*\\.nodejs20plus\\..*',
   ],
   testTimeout: 70_000,
   transform: {

packages/babel-plugin-jest-hoist/package.json

@@ -32,6 +32,7 @@
     "@babel/preset-react": "^7.27.1",
     "@babel/preset-typescript": "^7.27.1",
     "@babel/types": "^7.27.3",
+    "@jest/test-utils": "workspace:*",
     "@prettier/sync": "^0.5.5",
     "@types/babel__template": "^7.4.4",
     "@types/babel__traverse": "^7.20.7",

packages/babel-plugin-jest-hoist/src/__tests__/__snapshots__/hoistPlugin.nodejs18.test.ts.snap

@@ -9,9 +9,20 @@
 import * as path from 'path';
 import {format as formatCode, resolveConfig} from '@prettier/sync';
 import pluginTester from 'babel-plugin-tester';
+import {onNodeVersions} from '@jest/test-utils';
 import type {Options} from 'prettier';
 import babelPluginJestHoist from '..';
 
+// We need to use the Node.js implementation of `require` to load Babel 8
+// packages, instead of our sandboxed implementation, because Babel 8 is
+// written in ESM and we don't support require(esm) yet.
+import Module from 'node:module';
+import {pathToFileURL} from 'node:url';
+const createOriginalNodeRequire = Object.getPrototypeOf(Module).createRequire;
+const originalNodeRequire = createOriginalNodeRequire(
+  pathToFileURL(__filename),
+);
+
 const prettierOptions: Options = {
   ...resolveConfig(__filename),
   filepath: __filename,
@@ -28,7 +39,18 @@ describe('babel 7', () => {
   });
 });
 
-export function defineTests({
+describe('babel 8', () => {
+  onNodeVersions('>=20', skipped => {
+    const req = skipped ? () => null : originalNodeRequire;
+    defineTests({
+      babel: req('@babel-8/core'),
+      presetReact: req('@babel-8/preset-react'),
+      presetTypescript: req('@babel-8/preset-typescript'),
+    });
+  });
+});
+
+function defineTests({
   babel,
   presetReact,
   presetTypescript,

packages/babel-plugin-jest-hoist/src/__tests__/__snapshots__/hoistPlugin.nodejs20plus.test.ts.snap renamed to packages/babel-plugin-jest-hoist/src/__tests__/__snapshots__/hoistPlugin.test.ts.snap

@@ -4,5 +4,5 @@
   "compilerOptions": {
     "types": ["node", "@jest/test-globals"]
   },
-  "references": [{"path": "../../"}]
+  "references": [{"path": "../../"}, {"path": "../../../test-utils"}]
 }