Fix issue #6: Fire should accept null as data

CHANGELOG.md

@@ -20,4 +20,7 @@ Changelog
 * Using Darts new Stream.broadcast() factory.
 * Provide option for synchronous broadcasting of events.
 * Update unit tests and example.
-* Create demo page.
+* Create demo page.
+
+## Version 0.2.1 (2013-07-01) ##
+* Fix issue #6: Fire should accept null as data

lib/src/simple_event_bus.dart

@@ -29,8 +29,8 @@ class SimpleEventBus implements EventBus {
   }
 
   void fire(EventType/*<T>*/ eventType, /*<T>*/ data) {
-    if (!eventType.isTypeT(data)) {
-      throw new ArgumentError('Provided data is not of same type as generic type of EventType.');
+    if (data != null && !eventType.isTypeT(data)) {
+      throw new ArgumentError('Provided data is not of same type as T of EventType.');
     }
 
     var controller = streamControllers[eventType];

pubspec.yaml

@@ -1,5 +1,5 @@
 name: event_bus
-version: 0.2.0
+version: 0.2.1
 author: Marco Jakob <majakob@gmx.ch>
 description: A simple Event Bus using Dart Streams for decoupling applications
 homepage: https://github.com/marcojakob/dart-event-bus

test/src/simple_event_bus_test.dart

@@ -168,6 +168,14 @@ group('[SimpleEventBus]', () {
   test('fire_WrongDataType_ThrowsError', () {
     expect(() => eventBus.fire(stringEvent1, 22), throwsArgumentError);
   });
+
+  test('fire_NullAsData_NoError', () {
+    try {
+      eventBus.fire(stringEvent1, null);
+    } catch (e) {
+      fail('Should not throw error: $e');
+    }
+  });
 });
 }