chore: make glob-import test pass with workarounds

Author: sapphi-red

packages/vite/src/node/plugins/css.ts

@@ -577,7 +577,8 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
           code = `export default ${JSON.stringify(content)}`
         } else {
           // empty module when it's not a CSS module nor `?inline`
-          code = ''
+          // NOTE: add `export {}` otherwise rolldown treats the module as CJS (https://github.com/rolldown/rolldown/issues/2394)
+          code = 'export {}'
         }
 
         return {
@@ -596,7 +597,11 @@ export function cssPostPlugin(config: ResolvedConfig): RolldownPlugin {
       let chunkCSS = ''
       // the chunk is empty if it's a dynamic entry chunk that only contains a CSS import
       const isJsChunkEmpty = code === '' && !chunk.isEntry
-      let isPureCssChunk = true
+      // NOTE: use this instead of "chunk.exports.length === 0" because of https://github.com/rolldown/rolldown/issues/2395
+      let isPureCssChunk =
+        opts.format === 'es'
+          ? !/export\s+/.test(code)
+          : !/exports(?:\.\w|\[)/.test(code)
       const ids = Object.keys(chunk.modules)
       for (const id of ids) {
         if (styles.has(id)) {

vitest.config.e2e.ts

@@ -20,7 +20,6 @@ export default defineConfig({
             './playground/backend-integration/**/*.spec.[tj]s', // https://github.com/rolldown/rolldown/issues/2392
             './playground/dynamic-import/**/*.spec.[tj]s', // https://github.com/rolldown/rolldown/issues/1843
             './playground/external/**/*.spec.[tj]s', // https://github.com/rolldown/rolldown/issues/2041
-            './playground/glob-import/**/*.spec.[tj]s', // remove empty CSS generate chunk https://github.com/rolldown/rolldown/issues/1842
             './playground/lib/**/*.spec.[tj]s', // umd format
             './playground/object-hooks/**/*.spec.[tj]s', // object hook sequential
             './playground/optimize-deps/**/*.spec.[tj]s', // https://github.com/rolldown/rolldown/issues/2031