refactor(testing): migrate from Jest to Vitest for testing framework

.clinerules/rules.md

@@ -30,7 +30,7 @@ This document outlines the development guidelines and best practices for our Typ
 - **Testing**
   - Write unit tests for all business logic
   - Aim for high test coverage (at least 80%)
-  - Use Jest or Mocha for testing frameworks
+  - Use Vitest as the testing framework
   - Implement integration tests for critical paths
 
 - **Build Process**

.github/workflows/test.yml

@@ -17,15 +17,14 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node }}
-    - name: Install dependencies and run all scripts
+    - name: Install dependencies and run tests
       run: |
         npm ci
-        npm run all
+        npm run test -- --run
     - uses: coverallsapp/github-action@master
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
 
-  # Adding a comment to clarify the purpose of the Windows build job
   build-on-windows:
     strategy:
       matrix:
@@ -36,11 +35,10 @@ jobs:
     - uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node }}
-    # Node.js 20 already includes a recent npm version, so npm upgrade is not needed
+    - name: Install dependencies and run tests
-    - name: Install dependencies and run all scripts
       run: |
         npm ci
-        npm run all
+        npm run test -- --run
 
   test: # make sure the action works on a clean machine without building
     strategy:

DEVELOPMENT.md

@@ -14,3 +14,25 @@
 ### GitHub REST API v3
 
 - https://developer.github.com/v3/
+
+## Development Instructions
+
+### Running Tests
+
+This project uses [Vitest](https://vitest.dev/) for testing. To run the tests, use the following command:
+
+```bash
+npm run test
+```
+
+Vitest will execute all test files and provide a detailed report of the results.
+
+### Generating Coverage Reports
+
+To generate a test coverage report, use the following command:
+
+```bash
+npm run test:coverage
+```
+
+The coverage report will be available in the `coverage` directory.

README.md

@@ -73,6 +73,28 @@ jobs:
           dedupe_issues: true
 ```
 
+## Development
+
+### Running Tests
+
+This project uses [Vitest](https://vitest.dev/) for testing. To run the tests, use the following command:
+
+```bash
+npm run test
+```
+
+Vitest will execute all test files and provide a detailed report of the results. For coverage reports, you can use:
+
+```bash
+npm run test:coverage
+```
+
+Ensure all dependencies are installed before running the tests:
+
+```bash
+npm ci
+```
+
 - - -
 
 This action is inspired by [homoluctus/gitrivy](https://github.com/homoluctus/gitrivy).

__tests__/audit.test.ts

@@ -3,17 +3,17 @@ import * as fs from 'fs'
 import * as path from 'path'
 import {Audit} from '../src/audit'
 
-jest.mock('child_process')
+vi.mock('child_process')
 
 const audit = new Audit()
 
 describe('run', () => {
   beforeEach(() => {
-    jest.mocked(child_process).spawnSync.mockClear()
+    vi.mocked(child_process).spawnSync.mockClear()
   })
 
   test('finds vulnerabilities with default values', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       const stdout = fs.readFileSync(
         path.join(__dirname, 'testdata/audit/error.txt')
       )
@@ -34,7 +34,7 @@ describe('run', () => {
   })
 
   test('finds vulnerabilities with production flag enabled', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       const stdout = fs.readFileSync(
         path.join(__dirname, 'testdata/audit/error.txt')
       )
@@ -55,7 +55,7 @@ describe('run', () => {
   })
 
   test('finds vulnerabilities with json flag enabled', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       const stdout = fs.readFileSync(
         path.join(__dirname, 'testdata/audit/error.json')
       )
@@ -76,7 +76,7 @@ describe('run', () => {
   })
 
   test('does not find vulnerabilities', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       const stdout = fs.readFileSync(
         path.join(__dirname, 'testdata/audit/success.txt')
       )
@@ -97,7 +97,7 @@ describe('run', () => {
   })
 
   test('throws an error if error is not null', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       return {
         pid: 100,
         output: '',
@@ -115,7 +115,7 @@ describe('run', () => {
   })
 
   test('throws an error if status is null', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       return {
         pid: 100,
         output: '',
@@ -133,7 +133,7 @@ describe('run', () => {
   })
 
   test('throws an error if stderr is null', () => {
-    jest.mocked(child_process).spawnSync.mockImplementation((): any => {
+    vi.mocked(child_process).spawnSync.mockImplementation((): any => {
       return {
         pid: 100,
         output: '',

__tests__/issue.test.ts

@@ -68,7 +68,7 @@ describe('getExistingIssueNumber', () => {
   })
 
   test('gets existing open issue', async () => {
-    const getIssues = jest.fn()
+    const getIssues = vi.fn()
     getIssues.mockResolvedValue({
       data: [
         {
@@ -89,7 +89,7 @@ describe('getExistingIssueNumber', () => {
   })
 
   test('returns null when there is no open issue', async () => {
-    const getIssues = jest.fn()
+    const getIssues = vi.fn()
     getIssues.mockResolvedValue({data: []})
 
     const result = await issue.getExistingIssueNumber(getIssues, {repo, owner})
@@ -104,7 +104,7 @@ describe('getExistingIssueNumber', () => {
   })
 
   test('returns null when no issues match the issue title', async () => {
-    const getIssues = jest.fn()
+    const getIssues = vi.fn()
     getIssues.mockResolvedValue({
       data: [
         {

__tests__/main.test.ts

@@ -5,17 +5,17 @@ import {run} from '../src/main'
 import * as issue from '../src/issue'
 import * as pr from '../src/pr'
 
-jest.mock('../src/audit')
+vi.mock('../src/audit')
-jest.mock('../src/issue')
+vi.mock('../src/issue')
-jest.mock('../src/pr')
+vi.mock('../src/pr')
-jest.mock('@octokit/rest', () => {
+vi.mock('@octokit/rest', () => {
   return {
-    Octokit: jest.fn().mockImplementation(() => {
+    Octokit: vi.fn().mockImplementation(() => {
       return {
         issues: {
-          listForRepo: jest.fn(),
+          listForRepo: vi.fn(),
-          createComment: jest.fn(),
+          createComment: vi.fn(),
-          create: jest.fn()
+          create: vi.fn()
         }
       }
     })
@@ -25,8 +25,8 @@ jest.mock('@octokit/rest', () => {
 describe('run: pr', () => {
   beforeEach(() => {
     // initialize mock
-    jest.mocked(Audit).mockClear()
+    vi.mocked(Audit).mockClear()
-    jest.mocked(pr).createComment.mockClear()
+    vi.mocked(pr).createComment.mockClear()
 
     process.env.INPUT_AUDIT_LEVEL = 'low'
     process.env.INPUT_PRODUCTION_FLAG = 'false'
@@ -39,7 +39,7 @@ describe('run: pr', () => {
   })
 
   test('does not call pr.createComment if vulnerabilities are not found', () => {
-    jest.mocked(Audit).mockImplementation((): any => {
+    vi.mocked(Audit).mockImplementation((): any => {
       return {
         stdout: fs.readFileSync(
           path.join(__dirname, 'testdata/audit/success.txt')
@@ -57,14 +57,14 @@ describe('run: pr', () => {
       }
     })
 
-    jest.mocked(pr).createComment.mockResolvedValue()
+    vi.mocked(pr).createComment.mockResolvedValue()
 
     expect(run).not.toThrowError()
     expect(pr.createComment).not.toHaveBeenCalled()
   })
 
   test('calls pr.createComment if vulnerabilities are found in PR', () => {
-    jest.mocked(Audit).mockImplementation((): any => {
+    vi.mocked(Audit).mockImplementation((): any => {
       return {
         stdout: fs.readFileSync(
           path.join(__dirname, 'testdata/audit/error.txt')
@@ -82,7 +82,7 @@ describe('run: pr', () => {
       }
     })
 
-    jest.mocked(pr).createComment.mockResolvedValue()
+    vi.mocked(pr).createComment.mockResolvedValue()
 
     expect(run).not.toThrowError()
     expect(pr.createComment).toHaveBeenCalled()
@@ -91,7 +91,7 @@ describe('run: pr', () => {
   test('does not call pr.createComment if create_pr_comments is set to false', () => {
     process.env.INPUT_CREATE_PR_COMMENTS = 'false'
 
-    jest.mocked(Audit).mockImplementation((): any => {
+    vi.mocked(Audit).mockImplementation((): any => {
       return {
         stdout: fs.readFileSync(
           path.join(__dirname, 'testdata/audit/error.txt')
@@ -117,8 +117,8 @@ describe('run: pr', () => {
 describe('run: issue', () => {
   beforeEach(() => {
     // initialize mock
-    jest.mocked(Audit).mockClear()
+    vi.mocked(Audit).mockClear()
-    jest.mocked(issue).getExistingIssueNumber.mockClear()
+    vi.mocked(issue).getExistingIssueNumber.mockClear()
 
     process.env.INPUT_AUDIT_LEVEL = 'low'
     process.env.INPUT_PRODUCTION_FLAG = 'false'
@@ -133,7 +133,7 @@ describe('run: issue', () => {
   test('does not call octokit.rest.issues.create if create_issues is set to false', () => {
     process.env.INPUT_CREATE_ISSUES = 'false'
 
-    jest.mocked(Audit).mockImplementation((): any => {
+    vi.mocked(Audit).mockImplementation((): any => {
       return {
         stdout: fs.readFileSync(
           path.join(__dirname, 'testdata/audit/error.txt')
@@ -151,7 +151,7 @@ describe('run: issue', () => {
       }
     })
 
-    jest.mocked(issue).getExistingIssueNumber.mockResolvedValue(null)
+    vi.mocked(issue).getExistingIssueNumber.mockResolvedValue(null)
 
     expect(run).not.toThrowError()
     expect(issue.getExistingIssueNumber).not.toHaveBeenCalled()

jest.config.js

@@ -1,11 +0,0 @@
-module.exports = {
-  clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
-  testEnvironment: 'node',
-  testMatch: ['**/*.test.ts'],
-  testRunner: 'jest-circus/runner',
-  transform: {
-    '^.+\\.ts$': 'ts-jest'
-  },
-  verbose: true
-}

package.json

@@ -13,8 +13,9 @@
     "format-check": "prettier --check **/*.ts",
     "lint": "eslint src/**/*.ts",
     "pack": "ncc build",
-    "test": "jest",
+    "test": "vitest",
-    "all": "npm run build && npm run format && npm run lint && npm run pack && npm test -- --coverage"
+    "test:coverage": "vitest --coverage",
+    "all": "npm run build && npm run format && npm run lint && npm run pack && npm run test:coverage"
   },
   "repository": {
     "type": "git",
@@ -35,18 +36,16 @@
     "strip-ansi": "^6.0.1"
   },
   "devDependencies": {
-    "@types/jest": "^29.5.14",
     "@types/node": "^20.0.0",
     "@typescript-eslint/parser": "^6.7.4",
     "@vercel/ncc": "^0.38.3",
     "eslint": "^8.51.0",
     "eslint-plugin-github": "^4.10.1",
     "eslint-plugin-jest": "^27.4.2",
-    "jest": "^29.7.0",
-    "jest-circus": "^29.7.0",
     "js-yaml": "^4.0.0",
     "prettier": "^3.5.3",
-    "ts-jest": "^29.3.2",
+    "typescript": "^5.8.3",
-    "typescript": "^5.8.3"
+    "vite": "^6.3.4",
+    "vitest": "^3.1.2"
   }
 }

vitest.config.ts

@@ -0,0 +1,12 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['__tests__/**/*.test.ts'],
+    coverage: {
+      reporter: ['text', 'json', 'html'],
+    },
+  },
+});