Add styleMap writer

test/spec/ol/parser/kml.test.js

@@ -283,6 +283,31 @@ describe('ol.parser.KML', function() {
         done();
       });
     });
+
+    it('handles styleMap (read / write)', function(done) {
+      var url = 'spec/ol/parser/kml/stylemap.kml';
+      afterLoadXml(url, function(xml) {
+        var p = new ol.parser.KML({extractStyles: true});
+        var obj = p.read(xml);
+        var output = p.write(obj);
+        expect(goog.dom.xml.loadXml(output)).to.xmleql(xml);
+        
+        var symbolizers = obj.features[0].getSymbolizers();
+        expect(symbolizers).to.have.length(1);
+
+        var symbolizer = symbolizers[0];
+        expect(symbolizer).to.be.a(ol.style.Icon);
+
+        var literal = symbolizer.createLiteral(ol.geom.GeometryType.POINT);
+        expect(literal).to.be.a(ol.style.IconLiteral);
+
+        var url = 'http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png';
+        expect(literal.url).to.eql(url);
+        expect(literal.width).to.eql(32);
+        expect(literal.height).to.eql(32);
+        done();
+      });
+    });
   });
 
   describe('parsing states.kml', function() {