typescript-eslint · JoshuaKGoldberg · Mar 24, 2025 · Feb 3, 2025 · Feb 3, 2025 · Feb 3, 2025
diff --git a/eslint.config.mjs b/eslint.config.mjs
@@ -31,6 +31,7 @@ const restrictNamedDeclarations = {
 
 const vitestFiles = [
   'packages/eslint-plugin-internal/tests/**/*.test.{ts,tsx,cts,mts}',
+  'packages/typescript-eslint/tests/**/*.test.{ts,tsx,cts,mts}',
 ];
 
 export default tseslint.config(

diff --git a/packages/typescript-eslint/jest.config.js b/packages/typescript-eslint/jest.config.js
diff --git a/packages/typescript-eslint/package.json b/packages/typescript-eslint/package.json
@@ -46,10 +46,10 @@
     "build": "tsc -b tsconfig.build.json",
     "postbuild": "downlevel-dts dist _ts4.3/dist --to=4.3",
     "clean": "tsc -b tsconfig.build.json --clean",
-    "postclean": "rimraf dist && rimraf _ts4.3 && rimraf coverage",
+    "postclean": "rimraf dist/ _ts4.3/ coverage/",
     "format": "prettier --write \"./**/*.{ts,mts,cts,tsx,js,mjs,cjs,jsx,json,md,css}\" --ignore-path ../../.prettierignore",
     "lint": "nx lint",
-    "test": "jest --passWithNoTests",
+    "test": "vitest --run --config=$INIT_CWD/vitest.config.mts",
     "check-types": "npx nx typecheck"
   },
   "dependencies": {
@@ -62,12 +62,12 @@
     "typescript": ">=4.8.4 <5.9.0"
   },
   "devDependencies": {
-    "@jest/types": "29.6.3",
+    "@vitest/coverage-v8": "^3.0.8",
     "downlevel-dts": "*",
-    "jest": "29.7.0",
     "prettier": "^3.2.5",
     "rimraf": "*",
-    "typescript": "*"
+    "typescript": "*",
+    "vitest": "^3.0.8"
   },
   "funding": {
     "type": "opencollective",

diff --git a/packages/typescript-eslint/project.json b/packages/typescript-eslint/project.json
@@ -1,12 +1,16 @@
 {
   "name": "typescript-eslint",
   "$schema": "../../node_modules/nx/schemas/project-schema.json",
-  "type": "library",
-  "implicitDependencies": [],
+  "projectType": "library",
+  "root": "packages/typescript-eslint",
+  "sourceRoot": "packages/typescript-eslint/src",
   "targets": {
     "lint": {
       "executor": "@nx/eslint:lint",
       "outputs": ["{options.outputFile}"]
+    },
+    "test": {
+      "executor": "@nx/vite:test"
     }
   }
 }
diff --git a/packages/typescript-eslint/tsconfig.build.json b/packages/typescript-eslint/tsconfig.build.json
@@ -9,7 +9,7 @@
     "types": ["node"]
   },
   "include": ["src/**/*.ts"],
-  "exclude": ["jest.config.js", "src/**/*.spec.ts", "src/**/*.test.ts"],
+  "exclude": ["vitest.config.mts", "src/**/*.spec.ts", "src/**/*.test.ts"],
   "references": [
     {
       "path": "../utils/tsconfig.build.json"

diff --git a/packages/typescript-eslint/tsconfig.spec.json b/packages/typescript-eslint/tsconfig.spec.json
@@ -3,10 +3,12 @@
   "compilerOptions": {
     "outDir": "../../dist/out-tsc/packages/typescript-eslint",
     "module": "NodeNext",
-    "types": ["jest", "node"]
+    "resolveJsonModule": true,
+    "types": ["node", "vitest/globals", "vitest/importMeta"]
   },
   "include": [
-    "jest.config.js",
+    "vitest.config.mts",
+    "package.json",
     "src/**/*.test.ts",
     "src/**/*.spec.ts",
     "src/**/*.d.ts",
@@ -16,6 +18,9 @@
   "references": [
     {
       "path": "./tsconfig.build.json"
+    },
+    {
+      "path": "../../tsconfig.spec.json"
     }
   ]
 }
diff --git a/packages/typescript-eslint/vitest.config.mts b/packages/typescript-eslint/vitest.config.mts
@@ -0,0 +1,21 @@
+import * as path from 'node:path';
+import { defineProject, mergeConfig } from 'vitest/config';
+
+import { vitestBaseConfig } from '../../vitest.config.base.mjs';
+import packageJson from './package.json' with { type: 'json' };
+
+const vitestConfig = mergeConfig(
+  vitestBaseConfig,
+
+  defineProject({
+    root: import.meta.dirname,
+
+    test: {
+      dir: path.join(import.meta.dirname, 'tests'),
+      name: packageJson.name,
+      root: import.meta.dirname,
+    },
+  }),
+);
+
+export default vitestConfig;
diff --git a/yarn.lock b/yarn.lock
@@ -20428,15 +20428,15 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "typescript-eslint@workspace:packages/typescript-eslint"
   dependencies:
-    "@jest/types": 29.6.3
     "@typescript-eslint/eslint-plugin": 8.27.0
     "@typescript-eslint/parser": 8.27.0
     "@typescript-eslint/utils": 8.27.0
+    "@vitest/coverage-v8": ^3.0.8
     downlevel-dts: "*"
-    jest: 29.7.0
     prettier: ^3.2.5
     rimraf: "*"
     typescript: "*"
+    vitest: ^3.0.8
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
     typescript: ">=4.8.4 <5.9.0"