write an error if an EventEmitter hasn't fired

Author: cloudhead

lib/vows.js

@@ -162,6 +162,16 @@ function tryFinish(remaining) {
     }
 }
 
+//
+// On exit, check that all promises have been fired.
+// If not, print an error message.
+//
+process.addListener('exit', function () {
+    if (honored + broken + errored < total) {
+        sys.puts('\n* ' + stylize("An EventEmitter has failed to fire.", 'red'));
+    }
+});
+
 //
 // Wrap a Node.js style async function into an EventEmmitter
 //