reduce reproduction code

Author: mizdra

main.mts

@@ -8,27 +8,8 @@ async function sleep(ms: number): Promise<void> {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
-async function waitFor(fn: () => void): Promise<void> {
-  return new Promise((resolve, reject) => {
-    const intervalTimer = setInterval(() => {
-      try {
-        fn();
-        clearInterval(intervalTimer);
-        clearTimeout(timeoutTimer);
-        resolve();
-      } catch {
-        // ignore
-      }
-    }, 50);
-    const timeoutTimer = setTimeout(() => {
-      clearInterval(intervalTimer);
-      reject(new Error('Timeout waiting for condition'));
-    }, 1000);
-  });
-}
-
 const rootDir = join(import.meta.dirname, 'fixtures');
-const file = join(rootDir, 'src', 'a.module.css');
+const cssModuleFile = join(rootDir, 'src', 'a.module.css');
 
 // On macOS, chokidar may detect 'add' events for files added before watching starts.
 // To avoid test flakiness, wait for a short time before starting the watcher.
@@ -38,7 +19,7 @@ const { promise, resolve } = Promise.withResolvers<void>();
 const watcher = chokidar
   .watch(rootDir, { ignoreInitial: true })
   .on('change', (fileName) => {
-    if (fileName.endsWith('src/a.module.css')) {
+    if (fileName === cssModuleFile) {
       globalThis.changeCount++;
     }
   })
@@ -51,15 +32,13 @@ await sleep(100);
 globalThis.changeCount = 0;
 
 console.log('update a.module.css');
-await writeFile(file, '.a_1 { color: blue; }');
-await waitFor(() => {
-  assert(globalThis.changeCount === 1);
-});
+await writeFile(cssModuleFile, '.a_1 { color: blue; }');
+await sleep(1000); // Wait for chokidar to process the change event
+assert(globalThis.changeCount === 1);
 
 console.log('update a.module.css');
-await writeFile(file, '.a_1 { color: yellow; }');
-await waitFor(() => {
-  assert(globalThis.changeCount === 2);
-});
+await writeFile(cssModuleFile, '.a_1 { color: yellow; }');
+await sleep(1000); // Wait for chokidar to process the change event
+assert(globalThis.changeCount === 2);
 
 await watcher.close();