Adding unit tests for rule based styling

test/spec/ol/layer/vectorlayer.test.js

@@ -0,0 +1,53 @@
+goog.provide('ol.test.layer.Vector');
+
+describe('ol.layer.Vector', function() {
+
+  describe('#groupFeaturesBySymbolizerLiteral()', function() {
+
+    it('groups equal symbolizers', function() {
+      var layer = new ol.layer.Vector({
+        source: new ol.source.Vector({
+          projection: ol.Projection.getFromCode('EPSG:4326')
+        }),
+        style: new ol.style.Style({
+          rules: [
+            new ol.style.Rule({
+              symbolizers: [
+                new ol.style.Line({
+                  strokeWidth: 2,
+                  strokeStyle: new ol.Expression('colorProperty'),
+                  opacity: 1
+                })
+              ]
+            })
+          ]
+        })
+      });
+      var features = [
+        new ol.Feature({
+          g: new ol.geom.LineString([[-10, -10], [10, 10]]),
+          colorProperty: '#BADA55'
+        }),
+        new ol.Feature({
+          g: new ol.geom.LineString([[-10, 10], [10, -10]]),
+          colorProperty: '#013'
+        }),
+        new ol.Feature({
+          g: new ol.geom.LineString([[10, -10], [-10, -10]]),
+          colorProperty: '#013'
+        })
+      ];
+
+      var groups = layer.groupFeaturesBySymbolizerLiteral(features);
+      expect(groups.length).toBe(2);
+      expect(groups[0][0].length).toBe(1);
+      expect(groups[0][1].strokeStyle).toBe('#BADA55');
+      expect(groups[1][0].length).toBe(2);
+      expect(groups[1][1].strokeStyle).toBe('#013');
+
+      layer.dispose();
+    });
+
+  });
+
+});