test: ensure delay in recursive fs watch tests

test/parallel/test-fs-watch-recursive-add-file-to-existing-subfolder.js

@@ -48,7 +48,10 @@ watcher.on('change', function(event, filename) {
   }
 });
 
-fs.writeFileSync(childrenAbsolutePath, 'world');
+// Do the write with a delay to ensure that the OS is ready to notify us.
+setTimeout(() => {
+  fs.writeFileSync(childrenAbsolutePath, 'world');
+}, common.platformTimeout(200));
 
 process.once('exit', function() {
   assert(watcherClosed, 'watcher Object was not closed');

test/parallel/test-fs-watch-recursive-add-file-to-new-folder.js

@@ -44,8 +44,11 @@ watcher.on('change', function(event, filename) {
   }
 });
 
-fs.mkdirSync(filePath);
-fs.writeFileSync(childrenAbsolutePath, 'world');
+// Do the write with a delay to ensure that the OS is ready to notify us.
+setTimeout(() => {
+  fs.mkdirSync(filePath);
+  fs.writeFileSync(childrenAbsolutePath, 'world');
+}, common.platformTimeout(200));
 
 process.once('exit', function() {
   assert(watcherClosed, 'watcher Object was not closed');

test/parallel/test-fs-watch-recursive-add-file.js

@@ -39,7 +39,10 @@ watcher.on('change', function(event, filename) {
   }
 });
 
-fs.writeFileSync(testFile, 'world');
+// Do the write with a delay to ensure that the OS is ready to notify us.
+setTimeout(() => {
+  fs.writeFileSync(testFile, 'world');
+}, common.platformTimeout(200));
 
 process.once('exit', function() {
   assert(watcherClosed, 'watcher Object was not closed');

test/parallel/test-fs-watch-recursive-assert-leaks.js

@@ -42,4 +42,9 @@ watcher.on('change', common.mustCallAtLeast(async (event, filename) => {
 process.on('exit', function() {
   assert(watcherClosed, 'watcher Object was not closed');
 });
-fs.writeFileSync(filePath, 'content');
+
+// Do the write with a delay to ensure that the OS is ready to notify us.
+(async () => {
+  await setTimeout(200);
+  fs.writeFileSync(filePath, 'content');
+})().then(common.mustCall());

test/parallel/test-fs-watch-recursive-sync-write.js

@@ -32,4 +32,7 @@ const watcher = watch(tmpDir, { recursive: true }, common.mustCall((eventType, _
   assert.strictEqual(join(tmpDir, _filename), filename);
 }));
 
-writeFileSync(filename, 'foobar2');
+// Do the write with a delay to ensure that the OS is ready to notify us.
+setTimeout(() => {
+  writeFileSync(filename, 'foobar2');
+});

test/parallel/test-fs-watch-recursive-update-file.js

@@ -39,4 +39,7 @@ watcher.on('change', common.mustCallAtLeast(function(event, filename) {
   }
 }));
 
-fs.writeFileSync(testFile, 'hello');
+// Do the write with a delay to ensure that the OS is ready to notify us.
+setTimeout(() => {
+  fs.writeFileSync(testFile, 'hello');
+}, common.platformTimeout(200));