ci: add type lint check

.github/workflows/ci.yml

@@ -41,6 +41,9 @@ jobs:
       - name: Lint
         run: pnpm run lint
 
+      - name: Type Lint
+        run: pnpm run tsslint
+
       - name: Typecheck
         run: pnpm run typecheck
 

package.json

@@ -21,6 +21,7 @@
     "docs:contributors": "tsx scripts/update-contributors.ts",
     "lint": "eslint --cache .",
     "lint:fix": "nr lint --fix",
+    "tsslint": "tsslint --projects ./packages/*/tsconfig.json",
     "publish-ci": "tsx scripts/publish-ci.ts",
     "release": "tsx scripts/release.ts",
     "test": "pnpm --filter test-core test:threads",
@@ -42,6 +43,9 @@
     "@rollup/plugin-commonjs": "^28.0.1",
     "@rollup/plugin-json": "^6.1.0",
     "@rollup/plugin-node-resolve": "^15.3.0",
+    "@tsslint/cli": "^1.3.0",
+    "@tsslint/config": "^1.3.0",
+    "@tsslint/eslint": "^1.3.0",
     "@types/node": "^22.9.0",
     "@types/ws": "^8.5.13",
     "@vitest/browser": "workspace:*",

packages/vitest/src/node/core.ts

@@ -265,7 +265,7 @@ export class Vitest {
     }
 
     const workspaceModule = await this.runner.executeFile(workspaceConfigPath) as {
-      default: ReturnType<typeof defineWorkspace>
+      default: ReturnType<typeof defineWorkspace> | undefined
     }
 
     if (!workspaceModule.default || !Array.isArray(workspaceModule.default)) {
@@ -629,7 +629,7 @@ export class Vitest {
         this.config.related = undefined
       })
 
-    return await this.runningPromise
+    return this.runningPromise
   }
 
   async collectFiles(specs: WorkspaceSpec[]) {
@@ -669,15 +669,15 @@ export class Vitest {
         process.exitCode = 1
       }
     })()
-      .finally(async () => {
+      .finally(() => {
         this.runningPromise = undefined
 
         // all subsequent runs will treat this as a fresh run
         this.config.changed = false
         this.config.related = undefined
       })
 
-    return await this.runningPromise
+    return this.runningPromise
   }
 
   async cancelCurrentRun(reason: CancelReason) {
@@ -762,7 +762,7 @@ export class Vitest {
     }
   }
 
-  private _rerunTimer: any
+  private _rerunTimer: NodeJS.Timer | undefined
   private async scheduleRerun(triggerId: string[]) {
     const currentCount = this.restartsCount
     clearTimeout(this._rerunTimer)
@@ -856,7 +856,7 @@ export class Vitest {
     this.updateLastChanged(id)
     const needsRerun = this.handleFileChanged(id)
     if (needsRerun.length) {
-      this.scheduleRerun(needsRerun)
+      void this.scheduleRerun(needsRerun)
     }
   }
 
@@ -870,7 +870,7 @@ export class Vitest {
       this.cache.results.removeFromCache(id)
       this.cache.stats.removeStats(id)
       this.changedTests.delete(id)
-      this.report('onTestRemoved', id)
+      void this.report('onTestRemoved', id)
     }
   }
 
@@ -888,13 +888,13 @@ export class Vitest {
 
     if (matchingProjects.length > 0) {
       this.changedTests.add(id)
-      this.scheduleRerun([id])
+      void this.scheduleRerun([id])
     }
     else {
       // it's possible that file was already there but watcher triggered "add" event instead
       const needsRerun = this.handleFileChanged(id)
       if (needsRerun.length) {
-        this.scheduleRerun(needsRerun)
+        void this.scheduleRerun(needsRerun)
       }
     }
   }
@@ -980,7 +980,7 @@ export class Vitest {
         })
       }
 
-      if (rerun) {
+      if (rerun as boolean) {
         files.push(filepath)
       }
     }
@@ -1016,7 +1016,7 @@ export class Vitest {
           teardownProjects.push(this.coreWorkspaceProject)
         }
         // do teardown before closing the server
-        for await (const project of teardownProjects.reverse()) {
+        for (const project of teardownProjects.reverse()) {
           await project.teardownGlobalSetup()
         }
 

packages/vitest/src/public/execute.ts

@@ -1 +1,3 @@
 export { VitestExecutor } from '../runtime/execute'
+export type { ExecuteOptions } from '../runtime/execute'
+export type { VitestMocker } from '../runtime/mocker'

packages/web-worker/src/runner.ts

@@ -1,19 +1,19 @@
-import { VitestExecutor } from 'vitest/execute'
+import { type ExecuteOptions, VitestExecutor, type VitestMocker } from 'vitest/execute'
 
 export class InlineWorkerRunner extends VitestExecutor {
-  constructor(options: any, private context: any) {
+  constructor(options: ExecuteOptions, private context: any) {
     // share the same mocker as main executor
-    const mocker = (globalThis as any).__vitest_mocker__
+    const mocker = (globalThis as any).__vitest_mocker__ as VitestMocker
     super(options)
     this.mocker = (globalThis as any).__vitest_mocker__ = mocker
   }
 
-  prepareContext(context: Record<string, any>) {
+  prepareContext(context: Record<string, unknown>) {
     const ctx = super.prepareContext(context)
     // not supported for now, we can't synchronously load modules
     return Object.assign(ctx, this.context, {
       importScripts,
-    })
+    }) as Record<string, unknown>
   }
 }
 

packages/web-worker/src/shared-worker.ts

@@ -10,7 +10,7 @@ function convertNodePortToWebPort(port: NodeMessagePort): MessagePort {
   if (!('addEventListener' in port)) {
     Object.defineProperty(port, 'addEventListener', {
       value(...args: any[]) {
-        return this.addListener(...args)
+        return this.addListener(...args) as unknown
       },
       configurable: true,
       enumerable: true,
@@ -19,14 +19,14 @@ function convertNodePortToWebPort(port: NodeMessagePort): MessagePort {
   if (!('removeEventListener' in port)) {
     Object.defineProperty(port, 'removeEventListener', {
       value(...args: any[]) {
-        return this.removeListener(...args)
+        return this.removeListener(...args) as unknown
       },
       configurable: true,
       enumerable: true,
     })
   }
   if (!('dispatchEvent' in port)) {
-    const emit = (port as any).emit.bind(port)
+    const emit = (port as any).emit.bind(port) as (event: any) => boolean
     Object.defineProperty(port, 'emit', {
       value(event: any) {
         if (event.name === 'message') {
@@ -42,7 +42,7 @@ function convertNodePortToWebPort(port: NodeMessagePort): MessagePort {
     })
     Object.defineProperty(port, 'dispatchEvent', {
       value(event: any) {
-        return this.emit(event)
+        return this.emit(event) as unknown
       },
       configurable: true,
       enumerable: true,
@@ -94,8 +94,8 @@ export function createSharedWorkerConstructor(): typeof SharedWorker {
         dispatchEvent: (event: Event) => {
           return this._vw_workerTarget.dispatchEvent(event)
         },
-        addEventListener: (...args: any[]) => {
-          return this._vw_workerTarget.addEventListener(...args as [any, any])
+        addEventListener: (...args: Parameters<typeof addEventListener>) => {
+          return this._vw_workerTarget.addEventListener(...args)
         },
         removeEventListener: this._vw_workerTarget.removeEventListener,
         get self() {
@@ -106,11 +106,11 @@ export function createSharedWorkerConstructor(): typeof SharedWorker {
       selfProxy = new Proxy(context, {
         get(target, prop, receiver) {
           if (Reflect.has(target, prop)) {
-            return Reflect.get(target, prop, receiver)
+            return Reflect.get(target, prop, receiver) as unknown
           }
-          return Reflect.get(globalThis, prop, receiver)
+          return Reflect.get(globalThis, prop, receiver) as unknown
         },
-      }) as any
+      }) as unknown as typeof globalThis
 
       const channel = new MessageChannel()
       this.port = convertNodePortToWebPort(channel.port1)
@@ -135,7 +135,7 @@ export function createSharedWorkerConstructor(): typeof SharedWorker {
 
           return runner.executeFile(fsPath).then(() => {
             // worker should be new every time, invalidate its sub dependency
-            runnerOptions.moduleCache.invalidateSubDepTree([
+            runnerOptions.moduleCache!.invalidateSubDepTree([
               fsPath,
               runner.mocker.getMockPath(fsPath),
             ])
@@ -147,12 +147,12 @@ export function createSharedWorkerConstructor(): typeof SharedWorker {
             debug('shared worker %s successfully initialized', this._vw_name)
           })
         })
-        .catch((e) => {
+        .catch((e: unknown) => {
           debug('shared worker %s failed to initialize: %o', this._vw_name, e)
           const EventConstructor = globalThis.ErrorEvent || globalThis.Event
           const error = new EventConstructor('error', {
             error: e,
-            message: e.message,
+            message: e instanceof Error ? e.message : undefined,
           })
           this.dispatchEvent(error)
           this.onerror?.(error)

packages/web-worker/src/types.ts

@@ -1,6 +1,11 @@
 export type Procedure = (...args: any[]) => void
 export type CloneOption = 'native' | 'ponyfill' | 'none'
 
+export type PostMessageArgs = [
+  unknown,
+  StructuredSerializeOptions | Transferable[] | undefined,
+]
+
 export interface DefineWorkerOptions {
   clone: CloneOption
 }

packages/web-worker/src/utils.ts

@@ -1,4 +1,5 @@
 import type { WorkerGlobalState } from 'vitest'
+import type { ExecuteOptions } from 'vitest/execute'
 import type { CloneOption } from './types'
 import { readFileSync as _readFileSync } from 'node:fs'
 import ponyfillStructuredClone from '@ungap/structured-clone'
@@ -9,9 +10,9 @@ const readFileSync = _readFileSync
 
 export const debug = createDebug('vitest:web-worker')
 
-export function getWorkerState(): WorkerGlobalState {
+function getWorkerState(): WorkerGlobalState {
   // @ts-expect-error untyped global
-  return globalThis.__vitest_worker__
+  return globalThis.__vitest_worker__ as WorkerGlobalState
 }
 
 export function assertGlobalExists(name: string) {
@@ -23,7 +24,7 @@ export function assertGlobalExists(name: string) {
 }
 
 function createClonedMessageEvent(
-  data: any,
+  data: unknown,
   transferOrOptions: StructuredSerializeOptions | Transferable[] | undefined,
   clone: CloneOption,
 ) {
@@ -52,7 +53,7 @@ function createClonedMessageEvent(
       )
     }
     return new MessageEvent('message', {
-      data: ponyfillStructuredClone(data, { lossy: true } as any),
+      data: ponyfillStructuredClone(data, { lossy: true }),
       origin,
     })
   }
@@ -79,7 +80,7 @@ export function createMessageEvent(
   }
 }
 
-export function getRunnerOptions(): any {
+export function getRunnerOptions(): ExecuteOptions {
   const state = getWorkerState()
   const { config, rpc, moduleCache } = state
 

packages/web-worker/src/worker.ts

@@ -1,6 +1,7 @@
 import type {
   CloneOption,
   DefineWorkerOptions,
+  PostMessageArgs,
   Procedure,
 } from './types'
 import { InlineWorkerRunner } from './runner'
@@ -35,7 +36,7 @@ export function createWorkerConstructor(
     >()
 
     private _vw_name: string
-    private _vw_messageQueue: any[] | null = []
+    private _vw_messageQueue: PostMessageArgs[] | null = []
 
     public onmessage: null | Procedure = null
     public onmessageerror: null | Procedure = null
@@ -69,14 +70,14 @@ export function createWorkerConstructor(
         dispatchEvent: (event: Event) => {
           return this._vw_workerTarget.dispatchEvent(event)
         },
-        addEventListener: (...args: any[]) => {
+        addEventListener: (...args: Parameters<typeof addEventListener>) => {
           if (args[1]) {
             this._vw_insideListeners.set(args[0], args[1])
           }
-          return this._vw_workerTarget.addEventListener(...args as [any, any])
+          return this._vw_workerTarget.addEventListener(...args)
         },
         removeEventListener: this._vw_workerTarget.removeEventListener,
-        postMessage: (...args: any[]) => {
+        postMessage: (...args: Parameters<typeof postMessage>) => {
           if (!args.length) {
             throw new SyntaxError(
               '"postMessage" requires at least one argument.',
@@ -99,11 +100,11 @@ export function createWorkerConstructor(
       selfProxy = new Proxy(context, {
         get(target, prop, receiver) {
           if (Reflect.has(target, prop)) {
-            return Reflect.get(target, prop, receiver)
+            return Reflect.get(target, prop, receiver) as unknown
           }
           return globalThis[prop as 'crypto']
         },
-      }) as any
+      }) as unknown as typeof globalThis
 
       this._vw_workerTarget.addEventListener('message', (e) => {
         context.onmessage?.(e as MessageEvent)
@@ -132,7 +133,7 @@ export function createWorkerConstructor(
 
           return runner.executeFile(fsPath).then(() => {
             // worker should be new every time, invalidate its sub dependency
-            runnerOptions.moduleCache.invalidateSubDepTree([
+            runnerOptions.moduleCache!.invalidateSubDepTree([
               fsPath,
               runner.mocker.getMockPath(fsPath),
             ])
@@ -147,12 +148,12 @@ export function createWorkerConstructor(
             debug('worker %s successfully initialized', this._vw_name)
           })
         })
-        .catch((e) => {
+        .catch((e: unknown) => {
           debug('worker %s failed to initialize: %o', this._vw_name, e)
           const EventConstructor = globalThis.ErrorEvent || globalThis.Event
           const error = new EventConstructor('error', {
             error: e,
-            message: e.message,
+            message: e instanceof Error ? e.message : undefined,
           })
           this.dispatchEvent(error)
           this.onerror?.(error)
@@ -172,7 +173,7 @@ export function createWorkerConstructor(
     }
 
     postMessage(
-      ...args: [any, StructuredSerializeOptions | Transferable[] | undefined]
+      ...args: PostMessageArgs
     ): void {
       if (!args.length) {
         throw new SyntaxError('"postMessage" requires at least one argument.')

packages/ws-client/src/index.ts

@@ -83,10 +83,10 @@ export function createClient(url: string, options: VitestClientOptions = {}) {
   }
 
   const birpcHandlers: BirpcOptions<WebSocketHandlers> = {
-    post: msg => ctx.ws.send(msg),
+    post: (msg: string) => ctx.ws.send(msg),
     on: fn => (onMessage = fn),
-    serialize: e =>
-      stringify(e, (_, v) => {
+    serialize: (e: unknown) =>
+      stringify(e, (_, v: unknown) => {
         if (v instanceof Error) {
           return {
             name: v.name,