Add getLayers and test it. fixes #222

spec/index.html

@@ -46,6 +46,7 @@
 	<script type="text/javascript" src="suites/eachLayerSpec.js"></script>
 	<script type="text/javascript" src="suites/eventsSpec.js"></script>
 	<script type="text/javascript" src="suites/getBoundsSpec.js"></script>
+	<script type="text/javascript" src="suites/getLayersSpec.js"></script>
 
 	<script type="text/javascript" src="suites/NonPointSpec.js"></script>
 

spec/suites/getLayersSpec.js

@@ -0,0 +1,48 @@
+describe('getLayers', function () {
+	var map, div;
+	beforeEach(function () {
+		div = document.createElement('div');
+		div.style.width = '200px';
+		div.style.height = '200px';
+		document.body.appendChild(div);
+
+		map = L.map(div, { maxZoom: 18 });
+
+		map.fitBounds(new L.LatLngBounds([
+			[1, 1],
+			[2, 2]
+		]));
+	});
+	afterEach(function () {
+		document.body.removeChild(div);
+	});
+
+	it('hits polygons and markers before adding to map', function () {
+		var group = new L.MarkerClusterGroup();
+		var polygon = new L.Polygon([[1.5, 1.5], [2.0, 1.5], [2.0, 2.0], [1.5, 2.0]]);
+		var marker = new L.Marker([1.5, 1.5]);
+
+		group.addLayers([polygon, marker]);
+
+		var layers = group.getLayers();
+
+		expect(layers.length).to.be(2);
+		expect(layers).to.contain(marker);
+		expect(layers).to.contain(polygon);
+	});
+
+	it('hits polygons and markers after adding to map', function () {
+		var group = new L.MarkerClusterGroup();
+		var polygon = new L.Polygon([[1.5, 1.5], [2.0, 1.5], [2.0, 2.0], [1.5, 2.0]]);
+		var marker = new L.Marker([1.5, 1.5]);
+
+		group.addLayers([polygon, marker]);
+		map.addLayer(group);
+
+		var layers = group.getLayers();
+		
+		expect(layers.length).to.be(2);
+		expect(layers).to.contain(marker);
+		expect(layers).to.contain(polygon);
+	});
+});

src/MarkerClusterGroup.js

@@ -308,6 +308,15 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 		this._nonPointGroup.eachLayer(method, context);
 	},
 
+	//Overrides LayerGroup.getLayers
+	getLayers: function () {
+		var layers = [];
+		this.eachLayer(function (l) {
+			layers.push(l);
+		});
+		return layers;
+	},
+
 	//Returns true if the given layer is in this MarkerClusterGroup
 	hasLayer: function (layer) {
 		if (!layer) {