test: migrate to vitest

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
         run: yarn --immutable
 
       - name: Build and Test
-        run: yarn run-s test-compiled test
+        run: yarn run-s build test
 
       - name: Lint
         run: yarn lint

eslint.config.js

@@ -9,6 +9,7 @@ import json from 'eslint-plugin-json'
 import * as mdx from 'eslint-plugin-mdx'
 import n from 'eslint-plugin-n'
 import unicorn from 'eslint-plugin-unicorn'
+import vitest from 'eslint-plugin-vitest'
 import yml from 'eslint-plugin-yml'
 import prettier from 'eslint-plugin-prettier/recommended'
 import { createTypeScriptImportResolver } from 'eslint-import-resolver-typescript'
@@ -108,6 +109,10 @@ export default config(
       'import-x/unambiguous': 'off',
     },
   },
+  {
+    files: ['test/**/*.spec.ts'],
+    extends: [vitest.configs.recommended],
+  },
   {
     files: ['**/*.ts'],
     rules: {
@@ -150,7 +155,7 @@ export default config(
       '**/*.d.ts',
       '**/.eslintrc.js',
       'eslint.config.js',
-      'jest.config.ts',
+      'vitest.config.ts',
     ],
     rules: {
       'import-x/no-extraneous-dependencies': 'off',

package.json

@@ -61,8 +61,7 @@
     "lint:tsc": "tsc -p tsconfig.lib.json --noEmit",
     "prepare": "patch-package && simple-git-hooks && yarn-berry-deduplicate || exit 0",
     "release": "clean-pkg-json && changeset publish",
-    "test": "node --experimental-vm-modules --no-warnings=ESLintRCWarning node_modules/jest/bin/jest.js",
-    "test-compiled": "yarn build && TEST_COMPILED=1 yarn test",
+    "test": "node --no-warnings=ESLintRCWarning node_modules/vitest/vitest.mjs --run",
     "update:eslint-docs": "eslint-doc-generator --rule-doc-title-format prefix-name --rule-doc-section-options false --rule-list-split meta.docs.category --ignore-config stage-0 --config-emoji recommended,☑️",
     "watch": "yarn test --watch"
   },
@@ -107,16 +106,12 @@
     "@eslint/import-test-order-redirect-scoped": "link:./test/fixtures/order-redirect-scoped",
     "@eslint/js": "^9.23.0",
     "@pkgr/rollup": "^6.0.1",
-    "@swc-node/jest": "^1.8.13",
-    "@swc/core": "^1.11.13",
-    "@swc/helpers": "^0.5.15",
     "@test-scope/some-module": "link:./test/fixtures/symlinked-module",
     "@total-typescript/ts-reset": "^0.6.1",
     "@types/debug": "^4.1.12",
     "@types/eslint": "^9.6.1",
     "@types/eslint8.56": "npm:@types/eslint@~8.56.12",
     "@types/is-glob": "^4.0.4",
-    "@types/jest": "^29.5.14",
     "@types/json-schema": "^7.0.15",
     "@types/klaw-sync": "^6.0.5",
     "@types/node": "^22.13.14",
@@ -134,18 +129,17 @@
     "eslint-import-test-order-redirect": "link:./test/fixtures/order-redirect",
     "eslint-plugin-eslint-plugin": "^6.4.0",
     "eslint-plugin-import-x": "link:.",
-    "eslint-plugin-jest": "^28.11.0",
     "eslint-plugin-json": "^4.0.1",
     "eslint-plugin-mdx": "^3.3.1",
     "eslint-plugin-n": "^17.17.0",
     "eslint-plugin-prettier": "^5.2.5",
     "eslint-plugin-unicorn": "^58.0.0",
+    "eslint-plugin-vitest": "^0.5.4",
     "eslint-plugin-yml": "^1.17.0",
     "eslint8.56": "npm:eslint@~8.56.0",
     "eslint9": "npm:eslint@^9.23.0",
     "globals": "^16.0.0",
     "hermes-eslint": "^0.27.0",
-    "jest": "^30.0.0-alpha.7",
     "klaw-sync": "^7.0.0",
     "lint-staged": "^15.5.0",
     "npm-run-all2": "^7.0.2",
@@ -159,6 +153,7 @@
     "type-fest": "^4.38.0",
     "typescript": "^5.8.2",
     "typescript-eslint": "^8.28.0",
+    "vitest": "^3.0.9",
     "yarn-berry-deduplicate": "^6.1.1",
     "zod": "^3.24.2"
   },

src/rules/no-unused-modules.ts

@@ -7,7 +7,7 @@ import path from 'node:path'
 
 import { TSESTree } from '@typescript-eslint/utils'
 import type { TSESLint } from '@typescript-eslint/utils'
-// eslint-disable-next-line import-x/default -- incorrect types , commonjs actually
+// eslint-disable-next-line import-x/default -- incorrect types, commonjs actually
 import eslintUnsupportedApi from 'eslint/use-at-your-own-risk'
 
 import type { FileExtension, RuleContext } from '../types.js'
@@ -22,7 +22,7 @@ import {
   getValue,
 } from '../utils/index.js'
 
-// eslint-disable-next-line import-x/no-named-as-default-member -- incorrect types , commonjs actually
+// eslint-disable-next-line import-x/no-named-as-default-member -- incorrect types, commonjs actually
 const { FileEnumerator } = eslintUnsupportedApi
 
 function listFilesToProcess(src: string[], extensions: FileExtension[]) {

test/__snapshots__/fixtures.spec.ts.snap

@@ -1,6 +1,6 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`yarn pnp should just work 1`] = `
+exports[`yarn pnp > should just work 1`] = `
 {
   "exitCode": 0,
   "stderr": "",

test/__snapshots__/node-resolver.spec.ts.snap

@@ -1,14 +1,14 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`builtin node:path => true 1`] = `
+exports[`builtin > node:path => true 1`] = `
 {
   "expected": true,
   "requireResolve": "node:path",
   "source": "node:path",
 }
 `;
 
-exports[`builtin node:path => true 2`] = `
+exports[`builtin > node:path => true 2`] = `
 {
   "expected": true,
   "result": {
@@ -19,15 +19,15 @@ exports[`builtin node:path => true 2`] = `
 }
 `;
 
-exports[`builtin path => true 1`] = `
+exports[`builtin > path => true 1`] = `
 {
   "expected": true,
   "requireResolve": "path",
   "source": "path",
 }
 `;
 
-exports[`builtin path => true 2`] = `
+exports[`builtin > path => true 2`] = `
 {
   "expected": true,
   "result": {
@@ -38,15 +38,15 @@ exports[`builtin path => true 2`] = `
 }
 `;
 
-exports[`modules @sukka/does-not-exists => false 1`] = `
+exports[`modules > @sukka/does-not-exists => false 1`] = `
 {
   "expected": false,
   "requireResolve": undefined,
   "source": "@sukka/does-not-exists",
 }
 `;
 
-exports[`modules @sukka/does-not-exists => false 2`] = `
+exports[`modules > @sukka/does-not-exists => false 2`] = `
 {
   "expected": false,
   "result": {
@@ -56,34 +56,34 @@ exports[`modules @sukka/does-not-exists => false 2`] = `
 }
 `;
 
-exports[`modules jest => true 1`] = `
+exports[`modules > vitest => true 1`] = `
 {
   "expected": true,
-  "requireResolve": "<ROOT>/node_modules/jest/build/index.js",
-  "source": "jest",
+  "requireResolve": "<ROOT>/node_modules/vitest/index.cjs",
+  "source": "vitest",
 }
 `;
 
-exports[`modules jest => true 2`] = `
+exports[`modules > vitest => true 2`] = `
 {
   "expected": true,
   "result": {
     "found": true,
-    "path": "<ROOT>/node_modules/jest/build/index.js",
+    "path": "<ROOT>/node_modules/vitest/dist/index.js",
   },
-  "source": "jest",
+  "source": "vitest",
 }
 `;
 
-exports[`relative ../.github/dependabot.yml => false 1`] = `
+exports[`relative > ../.github/dependabot.yml => false 1`] = `
 {
   "expected": false,
   "requireResolve": undefined,
   "source": "../.github/dependabot.yml",
 }
 `;
 
-exports[`relative ../.github/dependabot.yml => false 2`] = `
+exports[`relative > ../.github/dependabot.yml => false 2`] = `
 {
   "expected": false,
   "result": {
@@ -93,15 +93,15 @@ exports[`relative ../.github/dependabot.yml => false 2`] = `
 }
 `;
 
-exports[`relative ../babel.config.cjs => babel.config.cjs 1`] = `
+exports[`relative > ../babel.config.cjs => babel.config.cjs 1`] = `
 {
   "expected": "babel.config.cjs",
   "requireResolve": "<ROOT>/babel.config.cjs",
   "source": "../babel.config.cjs",
 }
 `;
 
-exports[`relative ../babel.config.cjs => babel.config.cjs 2`] = `
+exports[`relative > ../babel.config.cjs => babel.config.cjs 2`] = `
 {
   "expected": "babel.config.cjs",
   "result": {
@@ -112,15 +112,15 @@ exports[`relative ../babel.config.cjs => babel.config.cjs 2`] = `
 }
 `;
 
-exports[`relative ../inexistent.js => false 1`] = `
+exports[`relative > ../inexistent.js => false 1`] = `
 {
   "expected": false,
   "requireResolve": undefined,
   "source": "../inexistent.js",
 }
 `;
 
-exports[`relative ../inexistent.js => false 2`] = `
+exports[`relative > ../inexistent.js => false 2`] = `
 {
   "expected": false,
   "result": {
@@ -130,15 +130,15 @@ exports[`relative ../inexistent.js => false 2`] = `
 }
 `;
 
-exports[`relative ../package.json => package.json 1`] = `
+exports[`relative > ../package.json => package.json 1`] = `
 {
   "expected": "package.json",
   "requireResolve": "<ROOT>/package.json",
   "source": "../package.json",
 }
 `;
 
-exports[`relative ../package.json => package.json 2`] = `
+exports[`relative > ../package.json => package.json 2`] = `
 {
   "expected": "package.json",
   "result": {
@@ -149,15 +149,15 @@ exports[`relative ../package.json => package.json 2`] = `
 }
 `;
 
-exports[`relative ../test => test/index.js 1`] = `
+exports[`relative > ../test => test/index.js 1`] = `
 {
   "expected": "test/index.js",
   "requireResolve": "<ROOT>/test/index.js",
   "source": "../test",
 }
 `;
 
-exports[`relative ../test => test/index.js 2`] = `
+exports[`relative > ../test => test/index.js 2`] = `
 {
   "expected": "test/index.js",
   "result": {
@@ -168,15 +168,15 @@ exports[`relative ../test => test/index.js 2`] = `
 }
 `;
 
-exports[`relative ../test/ => test/index.js 1`] = `
+exports[`relative > ../test/ => test/index.js 1`] = `
 {
   "expected": "test/index.js",
   "requireResolve": "<ROOT>/test/index.js",
   "source": "../test/",
 }
 `;
 
-exports[`relative ../test/ => test/index.js 2`] = `
+exports[`relative > ../test/ => test/index.js 2`] = `
 {
   "expected": "test/index.js",
   "result": {
@@ -187,15 +187,15 @@ exports[`relative ../test/ => test/index.js 2`] = `
 }
 `;
 
-exports[`relative ../test/index.js => test/index.js 1`] = `
+exports[`relative > ../test/index.js => test/index.js 1`] = `
 {
   "expected": "test/index.js",
   "requireResolve": "<ROOT>/test/index.js",
   "source": "../test/index.js",
 }
 `;
 
-exports[`relative ../test/index.js => test/index.js 2`] = `
+exports[`relative > ../test/index.js => test/index.js 2`] = `
 {
   "expected": "test/index.js",
   "result": {

test/cli.spec.ts

@@ -5,18 +5,19 @@
 import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 
-// eslint-disable-next-line import-x/default -- incorrect types , commonjs actually
+// eslint-disable-next-line import-x/default -- incorrect types, commonjs actually
 import eslintUnsupportedApi from 'eslint/use-at-your-own-risk'
 
 import importPlugin from 'eslint-plugin-import-x'
 
-// eslint-disable-next-line import-x/no-named-as-default-member -- incorrect types , commonjs actually
+// eslint-disable-next-line import-x/no-named-as-default-member -- incorrect types, commonjs actually
 const { LegacyESLint } = eslintUnsupportedApi
 
 describe('CLI regression tests', () => {
   const testDir = path.resolve(fileURLToPath(import.meta.url), '..')
 
   describe('issue #210', () => {
+    // eslint-disable-next-line vitest/expect-expect
     it("doesn't throw an error on gratuitous, erroneous self-reference", () => {
       const eslint = new LegacyESLint({
         cwd: testDir,

test/fixtures/deep/cache-1-lib.js

@@ -0,0 +1,2 @@
+import * as b from './cache-2-lib'
+export { b }