From dc0be1228c9741d0cacbd6e9bc8eae4efeba5fea Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Tue, 14 Apr 2015 09:54:32 +0200
Subject: [PATCH] Add more ol.layer.Group tests

---
 test/spec/ol/layer/layergroup.test.js | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/test/spec/ol/layer/layergroup.test.js b/test/spec/ol/layer/layergroup.test.js
index 23206931ef..38fcdccec2 100644
--- a/test/spec/ol/layer/layergroup.test.js
+++ b/test/spec/ol/layer/layergroup.test.js
@@ -326,6 +326,31 @@ describe('ol.layer.Group', function() {
 
   });
 
+  describe('layers events', function() {
+
+    it('listen / unlisten for layers added to the collection', function() {
+      var layers = new ol.Collection();
+      var layerGroup = new ol.layer.Group({
+        layers: layers
+      });
+      expect(goog.object.getCount(layerGroup.listenerKeys_)).to.eql(0);
+      var layer = new ol.layer.Layer({});
+      layers.push(layer);
+      expect(goog.object.getCount(layerGroup.listenerKeys_)).to.eql(1);
+
+      var listeners = layerGroup.listenerKeys_[goog.getUid(layer)];
+      expect(listeners.length).to.eql(2);
+      expect(listeners[0]).to.be.a(goog.events.Listener);
+      expect(listeners[1]).to.be.a(goog.events.Listener);
+
+      // remove the layer from the group
+      layers.pop();
+      expect(goog.object.getCount(layerGroup.listenerKeys_)).to.eql(0);
+      expect(listeners[0].removed).to.eql(true);
+      expect(listeners[1].removed).to.eql(true);
+    });
+
+  });
 
   describe('#setLayers', function() {
 
@@ -485,6 +510,7 @@ describe('ol.layer.Group', function() {
 
 goog.require('goog.dispose');
 goog.require('goog.events.EventType');
+goog.require('goog.events.Listener');
 goog.require('goog.object');
 goog.require('ol.ObjectEventType');
 goog.require('ol.extent');