[code-infra] Exclusively enable test mode in jsdom (#47812)

Author: Janpot

packages/mui-codemod/package.json

@@ -31,6 +31,7 @@
     "@babel/core": "^7.28.6",
     "@babel/runtime": "^7.28.6",
     "@babel/traverse": "^7.28.6",
+    "@mui/material-v5": "npm:@mui/material@5.18.0",
     "jscodeshift": "^17.1.2",
     "jscodeshift-add-imports": "^1.0.11",
     "postcss": "^8.5.6",
@@ -39,7 +40,6 @@
   },
   "devDependencies": {
     "@material-ui/core": "^4.12.4",
-    "@mui/material-v5": "npm:@mui/material@5.18.0",
     "@types/chai": "5.2.3",
     "@types/jscodeshift": "0.12.0",
     "chai": "6.2.2"

packages/mui-codemod/src/v5.0.0/path-imports.js

@@ -1,12 +1,5 @@
 import addImports from 'jscodeshift-add-imports';
 
-// istanbul ignore next
-if (globalThis.MUI_TEST_ENV) {
-  const resolve = require.resolve;
-  require.resolve = (source) =>
-    resolve(source.replace(/^@mui\/material\/modern/, '../../../mui-material/src'));
-}
-
 const barrelImportsToTransform = {
   material: {},
   'icons-material': {},

packages/mui-codemod/src/v5.0.0/top-level-imports.js

@@ -7,13 +7,8 @@ export default function transformer(fileInfo, api, options) {
   const importModule = options.importModule || '@mui/material';
   const targetModule = options.targetModule || '@mui/material';
 
-  let resolveModule = importModule;
-  if (globalThis.MUI_TEST_ENV) {
-    resolveModule = resolveModule.replace(/^@mui\/material/, '@mui/material-v5');
-  }
-
   const whitelist = getJSExports(
-    require.resolve(`${resolveModule}/modern`, {
+    require.resolve(`@mui/material-v5/modern`, {
       paths: [dirname(fileInfo.path)],
     }),
   );

pnpm-lock.yaml

@@ -1,5 +1,7 @@
 import setupVitest from '@mui/internal-test-utils/setupVitest';
 
-(globalThis as any).MUI_TEST_ENV = true;
+if (navigator.userAgent.includes('jsdom')) {
+  (globalThis as any).MUI_TEST_ENV = true;
+}
 
 setupVitest({ emotion: true });