Make sure we use the default featurePrefix

test/spec/ol/format/wfs.test.js

@@ -697,6 +697,29 @@ describe('ol.format.WFS', function() {
     });
   });
 
+  describe('when writing out a Transaction request', function() {
+
+    it('creates the correct update with default featurePrefix', function() {
+      var format = new ol.format.WFS();
+      var updateFeature = new ol.Feature();
+      updateFeature.setGeometryName('the_geom');
+      updateFeature.setGeometry(new ol.geom.MultiLineString([[
+        [-12279454, 6741885],
+        [-12064207, 6732101],
+        [-11941908, 6595126],
+        [-12240318, 6507071],
+        [-12416429, 6604910]
+      ]]));
+      updateFeature.setId('FAULTS.4455');
+      var serialized = format.writeTransaction(null, [updateFeature], null, {
+        featureNS: 'http://foo',
+        featureType: 'FAULTS',
+        gmlOptions: {srsName: 'EPSG:900913'}
+      });
+      expect(serialized.firstChild.attributes.getNamedItem('xmlns:feature') !== null).to.equal(true);
+    });
+  });
+
   describe('when writing out a Transaction request', function() {
 
     it('does not create an update if no fid', function() {