test: migrate from jest to vitest eslint plugin, remove remaining jest references (#14997)

- Removes old references to jest or files/dependencies that were no
longer used
- Removes the jest eslint plugin
- Installs the vitest eslint plugin. Didn't see any issues with the
recommended config, scrolling through our test files

Author: AlessioGr

.github/CODEOWNERS

@@ -22,7 +22,7 @@
 
 ## Build Files
 
-**/jest.config.js @denolfe @AlessioGr
+**/vitest.config.ts @denolfe @AlessioGr
 **/tsconfig*.json @denolfe @AlessioGr
 
 ## Root

package.json

@@ -123,7 +123,6 @@
     "script:pack": "pnpm --filter scripts pack-all-to-dest",
     "pretest": "pnpm build",
     "test": "pnpm test:int && pnpm test:components && pnpm test:e2e",
-    "test:components": "cross-env NODE_OPTIONS=\" --no-deprecation --no-experimental-strip-types\" jest --config=jest.components.config.js",
     "test:e2e": "pnpm runts ./test/runE2E.ts",
     "test:e2e:debug": "cross-env NODE_OPTIONS=\"--no-deprecation --no-experimental-strip-types\" NODE_NO_WARNINGS=1 PWDEBUG=1 DISABLE_LOGGING=true playwright test",
     "test:e2e:headed": "cross-env NODE_OPTIONS=\"--no-deprecation --no-experimental-strip-types\" NODE_NO_WARNINGS=1 DISABLE_LOGGING=true playwright test --headed",
@@ -164,7 +163,6 @@
     "@swc-node/register": "1.11.1",
     "@swc/cli": "0.7.9",
     "@swc/core": "1.15.3",
-    "@swc/jest": "0.2.39",
     "@types/fs-extra": "^11.0.2",
     "@types/minimist": "1.2.5",
     "@types/node": "22.15.30",

packages/eslint-config/configs/jest/index.mjs

@@ -5,12 +5,12 @@ import { configs as regexpPluginConfigs } from 'eslint-plugin-regexp'
 import eslintConfigPrettier from 'eslint-config-prettier/flat'
 import payloadPlugin from '@payloadcms/eslint-plugin'
 import reactExtends from './configs/react/index.mjs'
-import jestExtends from './configs/jest/index.mjs'
 import globals from 'globals'
 import importX from 'eslint-plugin-import-x'
 import typescriptParser from '@typescript-eslint/parser'
 import { deepMerge } from './deepMerge.js'
 import reactCompiler from 'eslint-plugin-react-compiler'
+import vitest from '@vitest/eslint-plugin'
 
 const baseRules = {
   // This rule makes no sense when overriding class methods. This is used a lot in richtext-lexical.
@@ -233,17 +233,16 @@ export const rootEslintConfig = [
   },
   {
     name: 'Unit Tests',
-    ...deepMerge(jestExtends, {
-      plugins: {
-        payload: payloadPlugin,
-      },
-      rules: {
-        ...baseRules,
-        ...typescriptRules,
-        '@typescript-eslint/unbound-method': 'off',
-      },
-    }),
-    files: ['**/*.spec.ts'],
+    plugins: {
+      vitest
+    },
+    rules: {
+      ...vitest.configs.recommended.rules,
+    },
+    files: [
+      '**/*.spec.ts',
+      '!**/*.e2e.spec.ts',
+    ],
   },
   {
     name: 'Payload Config',

packages/eslint-config/configs/jest/rules/jest-dom.mjs

@@ -29,11 +29,10 @@
     "@payloadcms/eslint-plugin": "workspace:*",
     "@types/eslint": "9.6.1",
     "@typescript-eslint/parser": "8.26.1",
+    "@vitest/eslint-plugin": "1.5.4",
     "eslint": "9.22.0",
     "eslint-config-prettier": "10.1.1",
     "eslint-plugin-import-x": "4.6.1",
-    "eslint-plugin-jest": "28.11.0",
-    "eslint-plugin-jest-dom": "5.5.0",
     "eslint-plugin-jsx-a11y": "6.10.2",
     "eslint-plugin-perfectionist": "3.9.1",
     "eslint-plugin-react-compiler": "19.1.0-rc.2",

packages/eslint-config/configs/jest/rules/jest.mjs

@@ -28,11 +28,10 @@
     "@eslint/js": "9.22.0",
     "@types/eslint": "9.6.1",
     "@typescript-eslint/parser": "8.26.1",
+    "@vitest/eslint-plugin": "1.5.4",
     "eslint": "9.22.0",
     "eslint-config-prettier": "10.1.1",
     "eslint-plugin-import-x": "4.6.1",
-    "eslint-plugin-jest": "28.11.0",
-    "eslint-plugin-jest-dom": "5.5.0",
     "eslint-plugin-jsx-a11y": "6.10.2",
     "eslint-plugin-perfectionist": "3.9.1",
     "eslint-plugin-react-hooks": "0.0.0-experimental-d331ba04-20250307",

packages/eslint-config/index.mjs

@@ -1,4 +1,3 @@
-/* eslint-disable jest/prefer-strict-equal */
 import { describe, it, expect } from 'vitest'
 import { formatName } from './formatName'