From 43d8f108bed3ae5b9e661f2e4c67a8649112080a Mon Sep 17 00:00:00 2001
From: Alex <alexmiller@gmail.com>
Date: Sun, 15 Jun 2014 12:42:13 -0700
Subject: [PATCH] added tests for signals emitting when component is
 added/removed; fixed bug with components being removed from entity not
 emitting signal

---
 src/family.js |  1 +
 test/world.js | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/src/family.js b/src/family.js
index 5ab530d..fcdd163 100644
--- a/src/family.js
+++ b/src/family.js
@@ -99,6 +99,7 @@ var Family = module.exports = Class.extend({
         for (i = 0, len = names.length; i < len; ++i) {
             if (names[i] === componentName) {
                 this._entities.remove(entity);
+                this.entityRemoved.emit(entity);
             }
         }
     },
diff --git a/test/world.js b/test/world.js
index b412c32..c1b3541 100644
--- a/test/world.js
+++ b/test/world.js
@@ -145,6 +145,43 @@ describe('world', function () {
         bListener.calledOnce.should.be.false;
     });
 
+    it('should emit signal when entity has component added', function() {
+        var world = new CES.World();
+
+        var abListener = sinon.spy();
+        var bListener = sinon.spy();
+        world.entityAdded('a', 'b').add(abListener);
+
+        var entity = new CES.Entity();
+        entity.addComponent(new CompA());
+        world.addEntity(entity);
+
+        abListener.calledOnce.should.be.false;
+
+        entity.addComponent(new CompB());
+
+        abListener.calledOnce.should.be.true;
+    });
+
+    it('should emit signal when entity has component removed', function() {
+        var world = new CES.World();
+
+        var abListener = sinon.spy();
+        var bListener = sinon.spy();
+        world.entityRemoved('a', 'b').add(abListener);
+
+        var entity = new CES.Entity();
+        entity.addComponent(new CompA());
+        entity.addComponent(new CompB());
+        world.addEntity(entity);
+
+        abListener.calledOnce.should.be.false;
+
+        entity.removeComponent('b');
+
+        abListener.calledOnce.should.be.true;
+    });
+
     describe('with system', function() {
         it('addToWorld should be called when system is added', function() {
             var world = new CES.World();