chore(eslint-plugin): migrate to vitest (#10579)

* chore(eslint-plugin): migrate to vitest

Migrates from jest to vitest.

The primary differences:

- You must import `describe`, `it`, etc
- Snapshots are not combined into one file by default
- ESM test files must be `.mts` (since we're in a `commonjs` package)

* chore(eslint-plugin): try retain a somewhat similar shot format

Tries to keep a similar format for sake of code review.

We can do a separate PR to drop this format and move to a snapshot per
file in future.

* chore(eslint-plugin): remove cross-spawn & add coverage-v8

* chore: add test-coverage script

* test: add missing expect import

* chore: use vitest globals for now

* fix: single run vitest

* chore: drop changes to it/test

* chore(eslint-plugin): disallow jest types

* chore(eslint-plugin): ignore jest linting

* chore(typescript-eslint): drop passWithNoTests

* chore(eslint-plugin): add console-fail-test

* chore(eslint-plugin): revert test to it changes

* test(eslint-plugin): use runIf instead of conditional block

* chore: drop unused vitest setup

* chore: fix test lint errors

* chore: clean up tsconfigs

* Fix introduced lint complaints

* Update packages/eslint-plugin/package.json

Co-authored-by: Kirk Waiblinger <[email protected]>

* Update packages/eslint-plugin/package.json

Co-authored-by: Kirk Waiblinger <[email protected]>

* normalize eslint.config.mjs and fix lint reports

* Remove unused devDependencies

* dedupe vitest version

* Updated test snapshot

* Switch reporters to just github-actions

* switch to basic reporter alongside github-actions

* testTimeout: 10_000

---------

Co-authored-by: Josh Goldberg <[email protected]>
Co-authored-by: Kirk Waiblinger <[email protected]>

Author: 3 people

eslint.config.mjs

@@ -33,6 +33,7 @@ const vitestFiles = [
   'packages/ast-spec/tests/**/*.test?(-d).{ts,tsx,cts,mts}',
   'packages/ast-spec/tests/util/setupVitest.mts',
   'packages/eslint-plugin-internal/tests/**/*.test.{ts,tsx,cts,mts}',
+  'packages/eslint-plugin/tests/**/*.test.{ts,tsx,cts,mts}',
   'packages/integration-tests/tests/**/*.test.{ts,tsx,cts,mts},',
   'packages/integration-tests/tools/integration-test-base.ts',
   'packages/integration-tests/tools/pack-packages.ts',

package.json

@@ -69,14 +69,12 @@
     "@nx/vite": "20.7.2",
     "@nx/workspace": "20.7.2",
     "@swc/core": "^1.4.12",
-    "@swc/jest": "^0.2.36",
     "@types/babel__code-frame": "^7.0.6",
     "@types/babel__core": "^7.20.5",
     "@types/debug": "^4.1.12",
     "@types/eslint-plugin-jsx-a11y": "^6.10.0",
     "@types/is-glob": "^4.0.4",
     "@types/jest": "29.5.13",
-    "@types/jest-specific-snapshot": "^0.5.9",
     "@types/natural-compare": "^1.4.3",
     "@types/node": "^20.12.5",
     "@types/semver": "^7.5.8",

packages/eslint-plugin/jest.config.js

@@ -56,8 +56,8 @@
     "generate:breaking-changes": "tsx tools/generate-breaking-changes.mts",
     "generate:configs": "npx nx generate-configs repo",
     "lint": "npx nx lint",
-    "test": "cross-env NODE_OPTIONS=\"--experimental-vm-modules\" jest --logHeapUsage",
-    "test-single": "cross-env NODE_OPTIONS=\"--experimental-vm-modules\" jest --no-coverage",
+    "test": "vitest --run --config=$INIT_CWD/vitest.config.mts",
+    "test-single": "vitest --run --config=$INIT_CWD/vitest.config.mts",
     "check-types": "npx nx typecheck"
   },
   "dependencies": {
@@ -72,18 +72,15 @@
     "ts-api-utils": "^2.0.1"
   },
   "devDependencies": {
-    "@jest/types": "29.6.3",
     "@types/marked": "^5.0.2",
     "@types/mdast": "^4.0.3",
     "@types/natural-compare": "*",
     "@typescript-eslint/rule-schema-to-typescript-types": "8.30.1",
     "@typescript-eslint/rule-tester": "8.30.1",
+    "@vitest/coverage-v8": "^3.1.1",
     "ajv": "^6.12.6",
-    "cross-env": "^7.0.3",
     "cross-fetch": "*",
     "eslint": "*",
-    "jest": "29.7.0",
-    "jest-specific-snapshot": "^8.0.0",
     "json-schema": "*",
     "markdown-table": "^3.0.3",
     "marked": "^5.1.2",
@@ -95,7 +92,8 @@
     "title-case": "^3.0.3",
     "tsx": "*",
     "typescript": "*",
-    "unist-util-visit": "^5.0.0"
+    "unist-util-visit": "^5.0.0",
+    "vitest": "^3.1.1"
   },
   "peerDependencies": {
     "@typescript-eslint/parser": "^8.0.0 || ^8.0.0-alpha.0",