Check for process.listeners as well, for GlobalErrors

- Fixes #1333

lib/jasmine-core/jasmine.js

@@ -1068,7 +1068,7 @@ getJasmineRequireObj().Env = function(j$) {
     this.it = function(description, fn, timeout) {
       // it() sometimes doesn't have a fn argument, so only check the type if
       // it's given.
-      if (arguments.length > 1) {
+      if (arguments.length > 1 && typeof fn !== 'undefined') {
         ensureIsFunction(fn, 'it');
       }
       var spec = specFactory(description, fn, currentDeclarationSuite, timeout);
@@ -1082,7 +1082,7 @@ getJasmineRequireObj().Env = function(j$) {
     this.xit = function(description, fn, timeout) {
       // xit(), like it(), doesn't always have a fn argument, so only check the
       // type when needed.
-      if (arguments.length > 1) {
+      if (arguments.length > 1 && typeof fn !== 'undefined') {
         ensureIsFunction(fn, 'xit');
       }
       var spec = this.it.apply(this, arguments);
@@ -2174,7 +2174,7 @@ getJasmineRequireObj().GlobalErrors = function(j$) {
     this.uninstall = function noop() {};
 
     this.install = function install() {
-      if (global.process && j$.isFunction_(global.process.on)) {
+      if (global.process && global.process.listeners && j$.isFunction_(global.process.on)) {
         var originalHandlers = global.process.listeners('uncaughtException');
         global.process.removeAllListeners('uncaughtException');
         global.process.on('uncaughtException', onerror);

src/core/GlobalErrors.js

@@ -11,7 +11,7 @@ getJasmineRequireObj().GlobalErrors = function(j$) {
     this.uninstall = function noop() {};
 
     this.install = function install() {
-      if (global.process && j$.isFunction_(global.process.on)) {
+      if (global.process && global.process.listeners && j$.isFunction_(global.process.on)) {
         var originalHandlers = global.process.listeners('uncaughtException');
         global.process.removeAllListeners('uncaughtException');
         global.process.on('uncaughtException', onerror);