feat: vitest deps.experimentalOptimizer (#170)

Author: ArnaudBarre

packages/plugin-react/CHANGELOG.md

@@ -1,5 +1,9 @@
+# Changelog
+
 ## Unreleased
 
+- Support [Vitest deps.experimentalOptimizer](https://vitest.dev/config/#deps-experimentaloptimizer)
+
 ## 4.0.0 (2023-04-20)
 
 This major version include a revamp of options:

packages/plugin-react/src/index.ts

@@ -125,7 +125,10 @@ export default function viteReact(opts: Options = {}): PluginOption[] {
       devBase = config.base
       projectRoot = config.root
       isProduction = config.isProduction
-      skipFastRefresh = isProduction || config.command === 'build'
+      skipFastRefresh =
+        isProduction ||
+        config.command === 'build' ||
+        (!!process.env.TEST && !process.env.VITE_TEST_HMR)
 
       if ('jsxPure' in opts) {
         config.logger.warnOnce(

playground/vitestGlobalSetup.ts

@@ -9,6 +9,7 @@ const DIR = path.join(os.tmpdir(), 'vitest_playwright_global_setup')
 let browserServer: BrowserServer | undefined
 
 export async function setup(): Promise<void> {
+  process.env.VITE_TEST_HMR = 'true' // To force HMR transformation in test environment
   process.env.NODE_ENV = process.env.VITE_TEST_BUILD
     ? 'production'
     : 'development'