use vitest instead of mocha

uses same build setup as vite; mocha doesn't like ESM

package.json

@@ -34,7 +34,7 @@
     "prepublishOnly": "npm run build",
     "prettier": "prettier . --check",
     "test": "npm run test:unit && npm run test:e2e",
-    "test:unit": "mocha test test/package-managers/*",
+    "test:unit": "vitest test/package-managers/*",
     "test:e2e": "./test/e2e.sh",
     "ncu": "node build/cli.js"
   },
@@ -67,7 +67,6 @@
     "@types/jsonlines": "^0.1.5",
     "@types/lodash": "^4.17.0",
     "@types/make-fetch-happen": "^10.0.4",
-    "@types/mocha": "^10.0.6",
     "@types/node": "^20.11.30",
     "@types/npm-registry-fetch": "^8.0.7",
     "@types/parse-github-url": "^1.0.3",
@@ -109,7 +108,6 @@
     "lodash": "^4.17.21",
     "make-fetch-happen": "^13.0.0",
     "markdownlint-cli": "^0.39.0",
-    "mocha": "^10.4.0",
     "npm-registry-fetch": "^16.1.0",
     "npm-run-all": "^4.1.5",
     "p-map": "^4.0.0",
@@ -130,7 +128,6 @@
     "spawn-please": "^3.0.0",
     "strip-ansi": "^7.1.0",
     "strip-json-comments": "^5.0.1",
-    "ts-node": "^10.9.2",
     "typescript": "^5.4.3",
     "typescript-json-schema": "^0.63.0",
     "untildify": "^4.0.0",
@@ -139,6 +136,7 @@
     "vite": "^5.2.6",
     "vite-node": "^1.4.0",
     "vite-plugin-dts": "^3.8.0",
+    "vitest": "^1.4.0",
     "yarn": "^1.22.22"
   },
   "files": [
@@ -157,19 +155,5 @@
     "empty-hostname": false,
     "type": "npm ",
     "path": "package-lock.json"
-  },
-  "mocha": {
-    "check-leaks": true,
-    "extension": [
-      "test.ts"
-    ],
-    "require": [
-      "source-map-support/register",
-      "ts-node/register"
-    ],
-    "timeout": 60000,
-    "trace-deprecation": true,
-    "trace-warnings": true,
-    "use_strict": true
   }
 }

test/deep.test.ts

@@ -43,12 +43,12 @@ const setupDeepTest = async () => {
   return tempDir
 }
 
-describe('--deep', function () {
-  this.timeout(60000)
-
+describe('--deep', { timeout: 60000 }, function () {
   let stub: { restore: () => void }
-  before(() => (stub = stubVersions('99.9.9', { spawn: true })))
-  after(() => stub.restore())
+  beforeEach(() => {
+    stub = stubVersions('99.9.9', { spawn: true })
+  })
+  afterEach(() => stub.restore())
 
   it('do not allow --packageFile and --deep together', async () => {
     await ncu({ packageFile: './package.json', deep: true }).should.eventually.be.rejectedWith('Cannot specify both')
@@ -121,14 +121,14 @@ describe('--deep', function () {
   })
 })
 
-describe('--deep with nested ncurc files', function () {
+describe('--deep with nested ncurc files', { timeout: 60000 }, function () {
   const cwd = path.join(__dirname, 'test-data/deep-ncurc')
 
-  this.timeout(60000)
-
   let stub: { restore: () => void }
-  before(() => (stub = stubVersions('99.9.9', { spawn: true })))
-  after(() => stub.restore())
+  beforeEach(() => {
+    stub = stubVersions('99.9.9', { spawn: true })
+  })
+  afterEach(() => stub.restore())
 
   it('use ncurc of nested packages', async () => {
     const { stdout } = await spawn('node', [bin, '--jsonUpgraded', '--deep'], {}, { cwd })

test/doctor.test.ts

@@ -174,13 +174,13 @@ const testFail = ({ packageManager }: { packageManager: PackageManagerName }) =>
   })
 }
 
-describe('doctor', function () {
-  // 3 min timeout
-  this.timeout(3 * 60 * 1000)
-
+// 3 min timeout
+describe('doctor', { timeout: 3 * 60 * 1000 }, function () {
   let stub: { restore: () => void }
-  before(() => (stub = stubVersions(mockNpmVersions, { spawn: true })))
-  after(() => stub.restore())
+  beforeEach(() => {
+    stub = stubVersions(mockNpmVersions, { spawn: true })
+  })
+  afterEach(() => stub.restore())
 
   describe('npm', () => {
     it('print instructions when -u is not specified', async () => {

test/filter.test.ts

@@ -13,8 +13,10 @@ const bin = path.join(__dirname, '../build/cli.js')
 describe('filter', () => {
   describe('module', () => {
     let stub: { restore: () => void }
-    before(() => (stub = stubVersions('99.9.9')))
-    after(() => stub.restore())
+    beforeEach(() => {
+      stub = stubVersions('99.9.9')
+    })
+    afterEach(() => stub.restore())
 
     it('filter by package name with one arg', async () => {
       const upgraded = (await ncu({
@@ -203,8 +205,10 @@ describe('filter', () => {
 
   describe('cli', () => {
     let stub: { restore: () => void }
-    before(() => (stub = stubVersions('99.9.9', { spawn: true })))
-    after(() => stub.restore())
+    beforeEach(() => {
+      stub = stubVersions('99.9.9', { spawn: true })
+    })
+    afterEach(() => stub.restore())
 
     it('filter by package name with --filter', async () => {
       const { stdout } = await spawn('node', [bin, '--jsonUpgraded', '--stdin', '--filter', 'express'], {
@@ -296,8 +300,10 @@ describe('filter', () => {
 describe('reject', () => {
   describe('cli', () => {
     let stub: { restore: () => void }
-    before(() => (stub = stubVersions('99.9.9', { spawn: true })))
-    after(() => stub.restore())
+    beforeEach(() => {
+      stub = stubVersions('99.9.9', { spawn: true })
+    })
+    afterEach(() => stub.restore())
 
     it('reject by package name with --reject', async () => {
       const { stdout } = await spawn('node', [bin, '--jsonUpgraded', '--stdin', '--reject', 'chalk'], {

test/filterVersion.test.ts

@@ -11,13 +11,13 @@ const bin = path.join(__dirname, '../build/cli.js')
 describe('filterVersion', () => {
   describe('module', () => {
     let stub: { restore: () => void }
-    before(() => {
+    beforeEach(() => {
       stub = stubVersions({
         'ncu-test-v2': '2.0.0',
         'ncu-test-return-version': '2.0.0',
       })
     })
-    after(() => {
+    afterEach(() => {
       stub.restore()
     })
 

test/interactive.test.ts

@@ -11,7 +11,7 @@ const bin = path.join(__dirname, '../build/cli.js')
 
 describe('--interactive', () => {
   let stub: { restore: () => void }
-  before(() => {
+  beforeEach(() => {
     stub = stubVersions(
       {
         'ncu-test-v2': '2.0.0',
@@ -22,7 +22,7 @@ describe('--interactive', () => {
       { spawn: true },
     )
   })
-  after(() => {
+  afterEach(() => {
     stub.restore()
   })
 

test/rc-config.test.ts

@@ -12,8 +12,10 @@ const bin = path.join(__dirname, '../build/cli.js')
 describe('rc-config', () => {
   // before/after must be placed within the describe block, otherwise they will apply to tests in other files
   let stub: { restore: () => void }
-  before(() => (stub = stubVersions('99.9.9', { spawn: true })))
-  after(() => stub.restore())
+  beforeEach(() => {
+    stub = stubVersions('99.9.9', { spawn: true })
+  })
+  afterEach(() => stub.restore())
 
   it('print rcConfigPath when there is a non-empty rc config file', async () => {
     const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'npm-check-updates-'))

test/workspaces.test.ts

@@ -112,7 +112,7 @@ let stub: { restore: () => void }
 
 describe('workspaces', () => {
   describe('stubbed', () => {
-    before(() => {
+    beforeEach(() => {
       stub = stubVersions(
         {
           'ncu-test-v2': '2.0.0',
@@ -122,13 +122,11 @@ describe('workspaces', () => {
         { spawn: true },
       )
     })
-    after(() => {
+    afterEach(() => {
       stub.restore()
     })
 
-    describe('--workspaces', function () {
-      this.timeout(60000)
-
+    describe('--workspaces', { timeout: 60000 }, function () {
       it('do not allow --workspaces and --deep together', async () => {
         await ncu({ workspaces: true, deep: true }).should.eventually.be.rejectedWith('Cannot specify both')
       })
@@ -256,9 +254,7 @@ describe('workspaces', () => {
       })
     })
 
-    describe('--workspace', function () {
-      this.timeout(60000)
-
+    describe('--workspace', { timeout: 60000 }, function () {
       it('do not allow --workspace and --deep together', async () => {
         await ncu({ workspace: ['a'], deep: true }).should.eventually.be.rejectedWith('Cannot specify both')
       })
@@ -360,9 +356,7 @@ describe('workspaces', () => {
       })
     })
 
-    describe('--root/--no-root', function () {
-      this.timeout(60000)
-
+    describe('--root/--no-root', { timeout: 60000 }, function () {
       it('update root project by default', async () => {
         const tempDir = await setup()
         try {
@@ -451,9 +445,7 @@ describe('workspaces', () => {
       })
     })
 
-    describe('--workspace should include --root by default', function () {
-      this.timeout(60000)
-
+    describe('--workspace should include --root by default', { timeout: 60000 }, function () {
       it('update root project and single workspace', async () => {
         const tempDir = await setup()
         try {

tsconfig.json

@@ -22,6 +22,7 @@
     "skipLibCheck": true,
     "sourceMap": true,
     "strict": true,
-    "target": "es2021"
+    "target": "es2021",
+    "types": ["node", "vitest/globals"]
   }
 }

vite.config.mts

@@ -11,7 +11,7 @@ export default defineConfig(({ mode }) => ({
       rollupTypes: true,
       include: ['src'],
     }),
-    nodeExternals(),
+    mode !== 'test' && nodeExternals(),
     {
       name: 'fixBinPerm',
       writeBundle: () => {
@@ -38,4 +38,11 @@ export default defineConfig(({ mode }) => ({
     outDir: 'build',
     minify: mode === 'production' && 'esbuild',
   },
+  test: {
+    globals: true,
+    typecheck: { enabled: true },
+    testOptions: {
+      files: ['test/**/*.test.ts'],
+    },
+  },
 }))