[react-packager] Fix EISDIR error

react-packager/src/FileWatcher/__tests__/FileWatcher-test.js

@@ -9,6 +9,8 @@
 'use strict';
 
 jest
+  .dontMock('util')
+  .dontMock('events')
   .dontMock('../')
   .dontMock('q')
   .setMock(
@@ -38,6 +40,21 @@ describe('FileWatcher', function() {
     });
   });
 
+  pit('should emit events', function() {
+    var cb;
+    Watcher.prototype.on.mockImplementation(function(type, callback) {
+      cb = callback;
+    });
+    var fileWatcher = new FileWatcher(['rootDir']);
+    var handler = jest.genMockFn();
+    fileWatcher.on('all', handler);
+    return fileWatcher._loading.then(function(){
+      cb(1, 2, 3, 4);
+      jest.runAllTimers();
+      expect(handler.mock.calls[0]).toEqual([1, 2, 3, 4]);
+    });
+  });
+
   pit('it should end the watcher', function() {
     var fileWatcher = new FileWatcher(['rootDir']);
     Watcher.prototype.close.mockImplementation(function(callback) {

react-packager/src/FileWatcher/index.js

@@ -45,8 +45,8 @@ function FileWatcher(rootConfigs) {
     rootConfigs.map(createWatcher)
   ).then(function(watchers) {
     watchers.forEach(function(watcher) {
-      watcher.on('all', function(type, filepath, root) {
-        fileWatcher.emit('all', type, filepath, root);
+      watcher.on('all', function(type, filepath, root, stat) {
+        fileWatcher.emit('all', type, filepath, root, stat);
       });
     });
     return watchers;