diff --git a/src/ol/source/vectorsource.js b/src/ol/source/vectorsource.js
index 07c14a1f97..a2098845a4 100644
--- a/src/ol/source/vectorsource.js
+++ b/src/ol/source/vectorsource.js
@@ -1,6 +1,7 @@
 goog.provide('ol.source.FeatureCache');
 goog.provide('ol.source.Vector');
 goog.provide('ol.source.VectorEventType');
+goog.provide('ol.source.VectorLoadState');
 
 goog.require('goog.asserts');
 goog.require('goog.async.nextTick');
diff --git a/test/spec/ol/source/vectorsource.test.js b/test/spec/ol/source/vectorsource.test.js
index 3ed5181df2..527d8e2aeb 100644
--- a/test/spec/ol/source/vectorsource.test.js
+++ b/test/spec/ol/source/vectorsource.test.js
@@ -3,21 +3,65 @@ goog.provide('ol.test.source.Vector');
 
 describe('ol.source.Vector', function() {
 
+  var url = 'spec/ol/source/vectorsource/single-feature.json';
+
   describe('constructor', function() {
     it('creates an instance', function() {
       var source = new ol.source.Vector();
       expect(source).to.be.a(ol.source.Vector);
       expect(source).to.be.a(ol.source.Source);
     });
+
+    it('accepts features', function() {
+      var features = [new ol.Feature()];
+      var source = new ol.source.Vector({
+        features: features
+      });
+      expect(source).to.be.a(ol.source.Vector);
+      expect(source.getFeatures()).to.eql(features);
+    });
+
+    it('accepts url and parser', function() {
+      var source = new ol.source.Vector({
+        url: url,
+        parser: new ol.parser.GeoJSON()
+      });
+      expect(source).to.be.a(ol.source.Vector);
+    });
+  });
+
+  describe('#load()', function() {
+    it('triggers loading of features', function() {
+      var source = new ol.source.Vector({
+        url: url,
+        parser: new ol.parser.GeoJSON()
+      });
+      expect(source.loadState_).to.be(ol.source.VectorLoadState.IDLE);
+      var triggered = source.load([-1, -1, 1, 1], ol.proj.get('EPSG:4326'));
+      expect(triggered).to.be(true);
+      expect(source.loadState_).to.be(ol.source.VectorLoadState.LOADING);
+    });
+
+    it('returns false when already loading', function() {
+      var source = new ol.source.Vector({
+        url: url,
+        parser: new ol.parser.GeoJSON()
+      });
+      source.load([-1, -1, 1, 1], ol.proj.get('EPSG:4326'));
+      // second call with same extent
+      var triggered = source.load([-1, -1, 1, 1], ol.proj.get('EPSG:4326'));
+      expect(triggered).to.be(false);
+      expect(source.loadState_).to.be(ol.source.VectorLoadState.LOADING);
+    });
   });
 
   describe('#addFeatures()', function() {
 
     it('allows adding features', function() {
       var source = new ol.source.Vector();
-      source.addFeatures([new ol.Feature(), new ol.Feature()]);
-      expect(goog.object.getCount(source.featureCache_.getFeaturesObject()))
-          .to.eql(2);
+      var features = [new ol.Feature()];
+      source.addFeatures(features);
+      expect(source.getFeatures()).to.eql(features);
     });
   });
 
@@ -88,7 +132,10 @@ goog.require('goog.object');
 goog.require('ol.Feature');
 goog.require('ol.geom.LineString');
 goog.require('ol.geom.Point');
+goog.require('ol.parser.GeoJSON');
+goog.require('ol.proj');
 goog.require('ol.source.FeatureCache');
 goog.require('ol.source.Source');
 goog.require('ol.source.Vector');
 goog.require('ol.source.VectorEventType');
+goog.require('ol.source.VectorLoadState');
diff --git a/test/spec/ol/source/vectorsource/single-feature.json b/test/spec/ol/source/vectorsource/single-feature.json
new file mode 100644
index 0000000000..5d7944efbe
--- /dev/null
+++ b/test/spec/ol/source/vectorsource/single-feature.json
@@ -0,0 +1,16 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "id": "point_1",
+      "geometry": {
+        "coordinates": [1, 2],
+        "type": "Point"
+      },
+      "properties": {
+        "name": "point"
+      }
+    }
+  ]
+}