Add a few more featuregroup tests and fix regression of removeLayer.

spec/suites/layer/FeatureGroupSpec.js

@@ -1,9 +1,12 @@
-describe('CircleMarker', function () {
+describe('FeatureGroup', function () {
+	var map;
+	beforeEach(function () {
+		map = L.map(document.createElement('div'));
+		map.setView([0, 0], 1);
+	});
 	describe("#_propagateEvent", function () {
-		var map, marker;
+		var marker;
 		beforeEach(function () {
-			map = L.map(document.createElement('div'));
-			map.setView([0, 0], 1);
 			marker = L.marker([0, 0]);
 		});
 		describe("when a Marker is added to multiple FeatureGroups ", function () {
@@ -33,4 +36,38 @@
 			});
 		});
 	});
+	describe('addLayer', function () {
+		it('adds the layer', function () {
+			var fg = L.featureGroup(),
+			    marker = L.marker([0, 0]);
+
+			expect(fg.hasLayer(marker)).to.be(false);
+
+			fg.addLayer(marker);
+
+			expect(fg.hasLayer(marker)).to.be(true);
+		});
+	});
+	describe('removeLayer', function () {
+		it('removes the layer passed to it', function () {
+			var fg = L.featureGroup(),
+			    marker = L.marker([0, 0]);
+
+			fg.addLayer(marker);
+			expect(fg.hasLayer(marker)).to.be(true);
+
+			fg.removeLayer(marker);
+			expect(fg.hasLayer(marker)).to.be(false);
+		});
+		it('removes the layer passed to it by id', function () {
+			var fg = L.featureGroup(),
+			    marker = L.marker([0, 0]);
+
+			fg.addLayer(marker);
+			expect(fg.hasLayer(marker)).to.be(true);
+
+			fg.removeLayer(marker._leaflet_id);
+			expect(fg.hasLayer(marker)).to.be(false);
+		});
+	});
 });

src/layer/FeatureGroup.js

@@ -27,9 +27,12 @@ L.FeatureGroup = L.LayerGroup.extend({
 	},
 
 	removeLayer: function (layer) {
-		var id = layer in this._layers ? layer : this.getLayerId(layer);
-
-		if (!this._layers[id]) { return this; }
+		if (!this.hasLayer(layer)) {
+			return this;
+		}
+		if (layer in this._layers) {
+			layer = this._layers[layer];
+		}
 
 		layer.off(L.FeatureGroup.EVENTS, this._propagateEvent, this);