Migrate to Vitest (#483)

* Migrate to Vitest

* `skipLibCheck` for now

.babelrc

@@ -1,6 +0,0 @@
-{
-  "presets": [
-    ["@babel/preset-env", { "targets": { "node": 10 } }],
-    "@babel/preset-typescript"
-  ]
-}

.github/workflows/ci.yml

@@ -1,6 +1,10 @@
 name: Node CI
 
-on: [pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   build:

package.json

@@ -4,27 +4,22 @@
   "main": "dist/index.js",
   "license": "MIT",
   "devDependencies": {
-    "@babel/core": "^7.13.10",
-    "@babel/preset-env": "^7.13.10",
-    "@babel/preset-typescript": "^7.13.0",
     "@changesets/changelog-github": "^0.4.2",
     "@changesets/cli": "^2.20.0",
     "@changesets/write": "^0.1.6",
     "@types/fs-extra": "^8.0.0",
-    "@types/jest": "^29.5.1",
     "@types/node": "^22.15.17",
     "@types/semver": "^7.5.0",
-    "babel-jest": "^29.5.0",
     "esbuild": "^0.25.4",
     "fixturez": "^1.1.0",
     "husky": "^3.0.3",
-    "jest": "^29.5.0",
     "prettier": "^2.0.5",
-    "typescript": "^5.8.3"
+    "typescript": "^5.8.3",
+    "vitest": "^3.1.3"
   },
   "scripts": {
     "build": "esbuild src/index.ts --bundle --platform=node --target=node20 --minify --outfile=dist/index.js",
-    "test": "jest",
+    "test": "vitest",
     "test:watch": "yarn test --watch",
     "typecheck": "tsc",
     "changeset": "changeset",

src/__snapshots__/run.test.ts.snap

@@ -1,6 +1,6 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`version creates simple PR 1`] = `
+exports[`version > creates simple PR 1`] = `
 [
   {
     "base": "some-branch",
@@ -33,7 +33,7 @@ exports[`version creates simple PR 1`] = `
 ]
 `;
 
-exports[`version does not include any release information if a message with simplified release info exceeds size limit 1`] = `
+exports[`version > does not include any release information if a message with simplified release info exceeds size limit 1`] = `
 [
   {
     "base": "some-branch",
@@ -51,7 +51,7 @@ exports[`version does not include any release information if a message with simp
 ]
 `;
 
-exports[`version does not include changelog entries if full message exceeds size limit 1`] = `
+exports[`version > does not include changelog entries if full message exceeds size limit 1`] = `
 [
   {
     "base": "some-branch",
@@ -73,7 +73,7 @@ exports[`version does not include changelog entries if full message exceeds size
 ]
 `;
 
-exports[`version doesn't include ignored package that got a dependency update in the PR body 1`] = `
+exports[`version > doesn't include ignored package that got a dependency update in the PR body 1`] = `
 [
   {
     "base": "some-branch",
@@ -95,7 +95,7 @@ exports[`version doesn't include ignored package that got a dependency update in
 ]
 `;
 
-exports[`version only includes bumped packages in the PR body 1`] = `
+exports[`version > only includes bumped packages in the PR body 1`] = `
 [
   {
     "base": "some-branch",

src/__snapshots__/utils.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
 exports[`it sorts the things right 1`] = `
 [

src/run.test.ts

@@ -3,11 +3,12 @@ import writeChangeset from "@changesets/write";
 import fixturez from "fixturez";
 import fs from "fs-extra";
 import path from "path";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 import { Git } from "./git";
 import { setupOctokit } from "./octokit";
 import { runVersion } from "./run";
 
-jest.mock("@actions/github", () => ({
+vi.mock("@actions/github", () => ({
   context: {
     repo: {
       owner: "changesets",
@@ -20,16 +21,16 @@ jest.mock("@actions/github", () => ({
     rest: mockedGithubMethods,
   }),
 }));
-jest.mock("./git");
-jest.mock("@changesets/ghcommit/git");
+vi.mock("./git");
+vi.mock("@changesets/ghcommit/git");
 
 let mockedGithubMethods = {
   pulls: {
-    create: jest.fn(),
-    list: jest.fn(),
+    create: vi.fn(),
+    list: vi.fn(),
   },
   repos: {
-    createRelease: jest.fn(),
+    createRelease: vi.fn(),
   },
 };
 
@@ -46,7 +47,7 @@ const writeChangesets = (changesets: Changeset[], cwd: string) => {
 };
 
 beforeEach(() => {
-  jest.clearAllMocks();
+  vi.clearAllMocks();
 });
 
 describe("version", () => {

src/utils.test.ts

@@ -1,4 +1,5 @@
-import { getChangelogEntry, BumpLevels, sortTheThings } from "./utils";
+import { expect, test } from "vitest";
+import { BumpLevels, getChangelogEntry, sortTheThings } from "./utils";
 
 let changelog = `# @keystone-alpha/email
 

tsconfig.json

@@ -6,6 +6,7 @@
     "isolatedModules": true,
     "strict": true,
     "moduleResolution": "node16",
-    "erasableSyntaxOnly": true
+    "erasableSyntaxOnly": true,
+    "skipLibCheck": true
   }
 }