vitest-dev · sheremet-va · Aug 1, 2023 · Aug 1, 2023 · Aug 1, 2023 · Aug 1, 2023
diff --git a/docs/config/index.md b/docs/config/index.md
@@ -177,17 +177,17 @@ Directory to save cache files.
 
 ### deps
 
-- **Type:** `{ experimentalOptimizer?, registerNodeLoader?, ... }`
+- **Type:** `{ optimizer?, registerNodeLoader?, ... }`
 
 Handling for dependencies resolution.
 
-#### deps.experimentalOptimizer
+#### deps.optimizer
 
 - **Type:** `{ ssr?, web? }`
-- **Version:** Since Vitest 0.29.0
+- **Version:** Since Vitest 0.34.0
 - **See also:** [Dep Optimization Options](https://vitejs.dev/config/dep-optimization-options.html)
 
-Enable dependency optimization. If you have a lot of tests, this might improve their performance.
+Enable dependency optimization. If you have a lot of tests, this might improve their performance. Before Vitest 0.34.0, it was named as `deps.experimentalOptimizer`.
 
 When Vitest encounters the external library listed in `include`, it will be bundled into a single file using esbuild and imported as a whole module. This is good for several reasons:
 
@@ -196,12 +196,12 @@ When Vitest encounters the external library listed in `include`, it will be bund
 - Your `alias` configuration is now respected inside bundled packages
 - Code in your tests is running closer to how it's running in the browser
 
-Be aware that only packages in `deps.experimentalOptimizer?.[mode].include` option are bundled (some plugins populate this automatically, like Svelte). You can read more about available options in [Vite](https://vitejs.dev/config/dep-optimization-options.html) docs. By default, Vitest uses `experimentalOptimizer.web` for `jsdom` and `happy-dom` environments, and `experimentalOptimizer.ssr` for `node` and `edge` environments, but it is configurable by [`transformMode`](#transformmode).
+Be aware that only packages in `deps.optimizer?.[mode].include` option are bundled (some plugins populate this automatically, like Svelte). You can read more about available options in [Vite](https://vitejs.dev/config/dep-optimization-options.html) docs. By default, Vitest uses `optimizer.web` for `jsdom` and `happy-dom` environments, and `optimizer.ssr` for `node` and `edge` environments, but it is configurable by [`transformMode`](#transformmode).
 
-This options also inherits your `optimizeDeps` configuration (for web Vitest will extend `optimizeDeps`, for ssr - `ssr.optimizeDeps`). If you redefine `include`/`exclude` option in `deps.experimentalOptimizer` it will extend your `optimizeDeps` when running tests. Vitest automatically removes the same options from `include`, if they are listed in `exclude`.
+This options also inherits your `optimizeDeps` configuration (for web Vitest will extend `optimizeDeps`, for ssr - `ssr.optimizeDeps`). If you redefine `include`/`exclude` option in `deps.optimizer` it will extend your `optimizeDeps` when running tests. Vitest automatically removes the same options from `include`, if they are listed in `exclude`.
 
 ::: tip
-You will not be able to edit your `node_modules` code for debugging, since the code is actually located in your `cacheDir` or `test.cache.dir` directory. If you want to debug with `console.log` statements, edit it directly or force rebundling with `deps.experimentalOptimizer?.[mode].force` option.
+You will not be able to edit your `node_modules` code for debugging, since the code is actually located in your `cacheDir` or `test.cache.dir` directory. If you want to debug with `console.log` statements, edit it directly or force rebundling with `deps.optimizer?.[mode].force` option.
 :::
 
 #### deps.registerNodeLoader<NonProjectOption />

diff --git a/examples/preact-testing-lib/index.html b/examples/preact-testing-lib/index.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Preact Example</title>
+</head>
+<body>
+  <div id="root"></div>
+  <script type="module" src="src/main.tsx"></script>
+</body>
+</html>
diff --git a/examples/preact-testing-lib/package.json b/examples/preact-testing-lib/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "@vitest/example-preact-testing-lib",
+  "private": true,
+  "scripts": {
+    "build": "tsc && vite build",
+    "coverage": "vitest run --coverage",
+    "dev": "vite",
+    "preview": "vite preview",
+    "test": "vitest",
+    "test:ui": "vitest --ui"
+  },
+  "dependencies": {
+    "preact": "^10.15.1",
+    "react": "npm:@preact/compat",
+    "react-dom": "npm:@preact/compat",
+    "react-router-dom": "^6.3.0"
+  },
+  "devDependencies": {
+    "@preact/preset-vite": "^2.5.0",
+    "@testing-library/jest-dom": "^5.16.4",
+    "@testing-library/preact": "^3.2.3",
+    "@vitest/ui": "latest",
+    "less": "^4.1.3",
+    "typescript": "^4.8.4",
+    "vite": "latest",
+    "vitest": "latest"
+  }
+}
diff --git a/examples/preact-testing-lib/src/App.less b/examples/preact-testing-lib/src/App.less
@@ -0,0 +1,23 @@
+.app {
+  text-align: center;
+
+  header {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    min-height: 100vh;
+    background-color: #282c34;
+    font-size: calc(10px + 2vmin);
+    color: white;
+
+    .app-link {
+      color: white;
+      text-decoration: none;
+
+      &:hover {
+        color: #747bff;
+      }
+    }
+  }
+}
diff --git a/examples/preact-testing-lib/src/App.test.tsx b/examples/preact-testing-lib/src/App.test.tsx
@@ -0,0 +1,18 @@
+import { describe, expect, it } from 'vitest'
+import { fireEvent, render, screen } from '@testing-library/preact'
+import { BrowserRouter } from 'react-router-dom'
+
+import App from './App'
+
+describe('Preact Demo Test Suite', () => {
+  it('basic', () => {
+    render(<BrowserRouter><App /></BrowserRouter>)
+    expect(screen.getByText(/Hello Vite & Preact!/i)).toBeInTheDocument()
+  })
+
+  it('click event', async () => {
+    render(<BrowserRouter><App /></BrowserRouter>)
+    fireEvent.click(screen.getByRole('button'))
+    expect(await screen.findByText(/count is: 1/i)).toBeInTheDocument()
+  })
+})
diff --git a/examples/preact-testing-lib/src/App.tsx b/examples/preact-testing-lib/src/App.tsx
@@ -0,0 +1,36 @@
+import { useCount } from './hooks/useCount'
+import './App.less'
+
+export default function App() {
+  const { count, inc } = useCount()
+
+  return (
+    <div class="app">
+      <header>
+        <h1>Hello Vite & Preact!</h1>
+        <p>
+          <button onClick={inc}>Count is: {count}</button>
+        </p>
+        <p>
+          <a
+            className="app-link"
+            href="https://preactjs.com/"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            Learn Preact
+          </a>
+          {' | '}
+          <a
+            className="app-link"
+            href="https://vitejs.dev/guide/features.html"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            Vite Docs
+          </a>
+        </p>
+      </header>
+    </div>
+  )
+}
diff --git a/examples/preact-testing-lib/src/hooks/useCount.test.ts b/examples/preact-testing-lib/src/hooks/useCount.test.ts
@@ -0,0 +1,12 @@
+import { act, renderHook } from '@testing-library/preact'
+import { useCount } from './useCount'
+
+describe('useCount hook', () => {
+  it('should increment', () => {
+    const { result } = renderHook(() => useCount())
+    act(() => {
+      result.current.inc()
+    })
+    expect(result.current.count).toBe(1)
+  })
+})
diff --git a/examples/preact-testing-lib/src/hooks/useCount.ts b/examples/preact-testing-lib/src/hooks/useCount.ts
@@ -0,0 +1,10 @@
+import { useCallback, useState } from 'preact/hooks'
+
+export function useCount() {
+  const [count, setCount] = useState(0)
+  const inc = useCallback(() => setCount(x => x + 1), [])
+  return {
+    count,
+    inc,
+  }
+}
diff --git a/examples/preact-testing-lib/src/main.less b/examples/preact-testing-lib/src/main.less
@@ -0,0 +1,13 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
diff --git a/examples/preact-testing-lib/src/main.tsx b/examples/preact-testing-lib/src/main.tsx
@@ -0,0 +1,5 @@
+import { render } from 'preact'
+import App from './App'
+import './main.less'
+
+render(<App />, document.getElementById('root'))
diff --git a/examples/preact-testing-lib/test/setup.ts b/examples/preact-testing-lib/test/setup.ts
@@ -0,0 +1,5 @@
+import { afterEach } from 'vitest'
+import { cleanup } from '@testing-library/preact'
+import '@testing-library/jest-dom'
+
+afterEach(() => cleanup())
diff --git a/examples/preact-testing-lib/tsconfig.json b/examples/preact-testing-lib/tsconfig.json
@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "preserve",
+    "jsxFactory": "h",
+    "jsxFragmentFactory": "Fragment",
+    "types": ["vitest/globals"]
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}
diff --git a/examples/preact-testing-lib/tsconfig.node.json b/examples/preact-testing-lib/tsconfig.node.json
@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}
diff --git a/examples/preact-testing-lib/vite.config.ts b/examples/preact-testing-lib/vite.config.ts
@@ -0,0 +1,20 @@
+/// <reference types="vitest" />
+/// <reference types="vite/client" />
+
+import { defineConfig } from 'vite'
+import preact from '@preact/preset-vite'
+
+export default defineConfig({
+  plugins: [preact()],
+  resolve: {
+    // react-router-dom specifies "module" field in package.json for ESM entry
+    // if it's not mapped, it uses the "main" field which is CommonJS that redirects to CJS preact
+    mainFields: ['module'],
+  },
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './test/setup.ts',
+    css: true,
+  },
+})
diff --git a/packages/vitest/src/node/create.ts b/packages/vitest/src/node/create.ts
@@ -28,7 +28,7 @@ export async function createVitest(mode: VitestRunMode, options: UserConfig, vit
   const server = await createServer(mergeConfig(config, mergeConfig(viteOverrides, { root: options.root })))
 
   // optimizer needs .listen() to be called
-  if (ctx.config.api?.port || ctx.config.deps?.experimentalOptimizer?.web?.enabled || ctx.config.deps?.experimentalOptimizer?.ssr?.enabled)
+  if (ctx.config.api?.port || ctx.config.deps?.optimizer?.web?.enabled || ctx.config.deps?.optimizer?.ssr?.enabled)
     await server.listen()
   else
     await server.pluginContainer.buildStart({})

diff --git a/packages/vitest/src/node/plugins/index.ts b/packages/vitest/src/node/plugins/index.ts
@@ -109,8 +109,8 @@ export async function VitestPlugin(options: UserConfig = {}, ctx = new Vitest('t
           }
         }
 
-        const webOptimizer = resolveOptimizerConfig(testConfig.deps?.experimentalOptimizer?.web, viteConfig.optimizeDeps, testConfig)
-        const ssrOptimizer = resolveOptimizerConfig(testConfig.deps?.experimentalOptimizer?.ssr, viteConfig.ssr?.optimizeDeps, testConfig)
+        const webOptimizer = resolveOptimizerConfig(testConfig.deps?.optimizer?.web, viteConfig.optimizeDeps, testConfig)
+        const ssrOptimizer = resolveOptimizerConfig(testConfig.deps?.optimizer?.ssr, viteConfig.ssr?.optimizeDeps, testConfig)
 
         config.cacheDir = webOptimizer.cacheDir || ssrOptimizer.cacheDir || config.cacheDir
         config.optimizeDeps = webOptimizer.optimizeDeps

diff --git a/packages/vitest/src/node/plugins/utils.ts b/packages/vitest/src/node/plugins/utils.ts
@@ -3,13 +3,17 @@ import { version as viteVersion } from 'vite'
 import type { DepOptimizationOptions, UserConfig as ViteConfig } from 'vite'
 import type { DepsOptimizationOptions, InlineConfig } from '../../types'
 
-export function resolveOptimizerConfig(testOptionc: DepsOptimizationOptions | undefined, viteOptions: DepOptimizationOptions | undefined, testConfig: InlineConfig) {
+export function resolveOptimizerConfig(_testOptions: DepsOptimizationOptions | undefined, viteOptions: DepOptimizationOptions | undefined, testConfig: InlineConfig) {
+  const testOptions = _testOptions || {}
   const newConfig: { cacheDir?: string; optimizeDeps: DepOptimizationOptions } = {} as any
   const [major, minor] = viteVersion.split('.').map(Number)
   const allowed = major >= 5 || (major === 4 && minor >= 3)
-  if (!allowed && testOptionc?.enabled === true)
+  if (!allowed && testOptions?.enabled === true)
     console.warn(`Vitest: "deps.optimizer" is only available in Vite >= 4.3.0, current Vite version: ${viteVersion}`)
-  if (!allowed || testOptionc?.enabled !== true) {
+  else
+    // enable by default
+    testOptions.enabled ??= true
+  if (!allowed || testOptions?.enabled !== true) {
     newConfig.cacheDir = undefined
     newConfig.optimizeDeps = {
       // experimental in Vite >2.9.2, entries remains to help with older versions
@@ -22,12 +26,12 @@ export function resolveOptimizerConfig(testOptionc: DepsOptimizationOptions | un
     newConfig.cacheDir = cacheDir ?? 'node_modules/.vitest'
     newConfig.optimizeDeps = {
       ...viteOptions,
-      ...testOptionc,
+      ...testOptions,
       noDiscovery: true,
       disabled: false,
       entries: [],
-      exclude: ['vitest', ...builtinModules, ...(testOptionc.exclude || viteOptions?.exclude || [])],
-      include: (testOptionc.include || viteOptions?.include || []).filter((n: string) => n !== 'vitest'),
+      exclude: ['vitest', ...builtinModules, ...(testOptions.exclude || viteOptions?.exclude || [])],
+      include: (testOptions.include || viteOptions?.include || []).filter((n: string) => n !== 'vitest'),
     }
   }
   return newConfig

diff --git a/packages/vitest/src/node/plugins/workspace.ts b/packages/vitest/src/node/plugins/workspace.ts
@@ -89,8 +89,8 @@ export function WorkspaceVitestPlugin(project: WorkspaceProject, options: Worksp
           }
         }
 
-        const webOptimizer = resolveOptimizerConfig(testConfig.deps?.experimentalOptimizer?.web, viteConfig.optimizeDeps, testConfig)
-        const ssrOptimizer = resolveOptimizerConfig(testConfig.deps?.experimentalOptimizer?.ssr, viteConfig.ssr?.optimizeDeps, testConfig)
+        const webOptimizer = resolveOptimizerConfig(testConfig.deps?.optimizer?.web, viteConfig.optimizeDeps, testConfig)
+        const ssrOptimizer = resolveOptimizerConfig(testConfig.deps?.optimizer?.ssr, viteConfig.ssr?.optimizeDeps, testConfig)
 
         config.cacheDir = webOptimizer.cacheDir || ssrOptimizer.cacheDir || config.cacheDir
         config.optimizeDeps = webOptimizer.optimizeDeps

diff --git a/packages/vitest/src/node/workspace.ts b/packages/vitest/src/node/workspace.ts
@@ -52,7 +52,7 @@ export async function initializeProject(workspacePath: string | number, ctx: Vit
   const server = await createServer(config)
 
   // optimizer needs .listen() to be called
-  if (ctx.config.api?.port || project.config.deps?.experimentalOptimizer?.web?.enabled || project.config.deps?.experimentalOptimizer?.ssr?.enabled)
+  if (ctx.config.api?.port || project.config.deps?.optimizer?.web?.enabled || project.config.deps?.optimizer?.ssr?.enabled)
     await server.listen()
   else
     await server.pluginContainer.buildStart({})
@@ -293,10 +293,10 @@ export class WorkspaceProject {
         ...this.config.deps,
         optimizer: {
           web: {
-            enabled: this.config.deps?.experimentalOptimizer?.web?.enabled ?? false,
+            enabled: this.config.deps?.optimizer?.web?.enabled ?? false,
           },
           ssr: {
-            enabled: this.config.deps?.experimentalOptimizer?.ssr?.enabled ?? false,
+            enabled: this.config.deps?.optimizer?.ssr?.enabled ?? false,
           },
         },
       },

diff --git a/packages/vitest/src/types/config.ts b/packages/vitest/src/types/config.ts
@@ -77,7 +77,7 @@ interface SequenceOptions {
 }
 
 export type DepsOptimizationOptions = Omit<DepOptimizationConfig, 'disabled' | 'noDiscovery'> & {
-  enabled: boolean
+  enabled?: boolean
 }
 
 export interface TransformModePatterns {
@@ -102,7 +102,7 @@ interface DepsOptions {
   /**
    * Enable dependency optimization. This can improve the performance of your tests.
    */
-  experimentalOptimizer?: {
+  optimizer?: {
     web?: DepsOptimizationOptions
     ssr?: DepsOptimizationOptions
   }