Add error handler test

lib/koroutine.js

@@ -46,8 +46,8 @@ function stitchBreadcrumbs (error, breadcrumbs) {
  * Utility function that resumes the coroutine by throwing TimedOut exception when coroutine/callback/future does not finish before set timeout
  * @param {Function} either resume or future function
  * @param {String} 'coroutine' or 'callback' or 'future'
- * @param {*}  Name of the callback or future involved. optional.
- * @param {*} timeout in milliseconds
+ * @param {String} Name of the callback or future involved. optional.
+ * @param {Number} timeout in milliseconds
  */
 function timedOut (resume, type, name, timeout) {
   const e = new Error((type || '') + ' ' + (name || '') + ' did not finish within ' + timeout + ' ms.');

test/koroutine.test.js

@@ -43,6 +43,14 @@ function* testSequentialCalls (test) {
   test.done();
 }
 
+function* alwaysThrows () {
+  throw new Error('ERROR');
+}
+
+exports['Test koroutine error handler function'] = function (test) {
+  koroutine.run(alwaysThrows(), {errorHandler: () => test.done()});
+};
+
 exports['Test koroutine.callback() fail when koroutine not started'] = function (test) {
   try {
     asyncCallSuccess('input-1', koroutine.callback(), 100);