Revert "Move os.EOL into testRule() and remove no longer needed `…

…jest-setup-after-env.js`"

This reverts commit ebe4650.

__tests__/__snapshots__/index.test.js.snap

@@ -3,6 +3,7 @@
 exports[`should contain expected keys 1`] = `
 [
   "setupFiles",
+  "setupFilesAfterEnv",
   "testEnvironment",
 ]
 `;

getTestRule.js

@@ -1,6 +1,5 @@
 'use strict';
 
-const os = require('os');
 const util = require('util');
 
 /**
@@ -14,20 +13,9 @@ module.exports = function getTestRule(options = {}) {
 		/** @type {import('stylelint').lint} */
 		let lint;
 
-		const eolDescriptor = Object.getOwnPropertyDescriptor(os, 'EOL');
-
-		if (!eolDescriptor) throw new TypeError('`os` must have an `EOL` property');
-
 		beforeAll(() => {
 			// eslint-disable-next-line n/no-unpublished-require -- Avoid auto-install of `stylelint` peer dependency.
 			lint = require('stylelint').lint;
-
-			// NOTE: `jest.replaceProperty()` is unavailable for a read-only property.
-			Object.defineProperty(os, 'EOL', { ...eolDescriptor, value: '\n' });
-		});
-
-		afterAll(() => {
-			Object.defineProperty(os, 'EOL', eolDescriptor);
 		});
 
 		describe(`${schema.ruleName}`, () => {

jest-preset.js

@@ -2,5 +2,6 @@
 
 module.exports = {
 	setupFiles: [require.resolve('./jest-setup.js')],
+	setupFilesAfterEnv: [require.resolve('./jest-setup-after-env.js')],
 	testEnvironment: 'node',
 };

jest-setup-after-env.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const os = require('os');
+
+const eolDescriptor = Object.getOwnPropertyDescriptor(os, 'EOL');
+
+if (!eolDescriptor) {
+	throw new TypeError('`os` must have an `EOL` property');
+}
+
+beforeAll(() => {
+	// NOTE: `jest.replaceProperty()` is unavailable for a read-only property.
+	Object.defineProperty(os, 'EOL', { ...eolDescriptor, value: '\n' });
+});
+
+afterAll(() => {
+	Object.defineProperty(os, 'EOL', eolDescriptor);
+});

package.json

@@ -17,6 +17,7 @@
     "getTestRule.js",
     "jest-preset.js",
     "jest-setup.js",
+    "jest-setup-after-env.js",
     "index.d.ts"
   ],
   "scripts": {