Adding crossOrigin to optionsFromCapabilities

This pull request should resolve: https://github.com/openlayers/openlayers/issues/6521

Now with var and single quotes

src/ol/source/wmts.js

@@ -292,6 +292,7 @@ ol.source.WMTS.prototype.updateDimensions = function(dimensions) {
  *  - style - {string} The name of the style
  *  - format - {string} Image format for the layer. Default is the first
  *       format returned in the GetCapabilities response.
+ *  - crossOrigin - {string|null|undefined} Cross origin. Default is `undefined`.
  * @return {?olx.source.WMTSOptions} WMTS source options object or `null` if the layer was not found.
  * @api
  */
@@ -447,6 +448,7 @@ ol.source.WMTS.optionsFromCapabilities = function(wmtsCap, config) {
     tileGrid: tileGrid,
     style: style,
     dimensions: dimensions,
-    wrapX: wrapX
+    wrapX: wrapX,
+    crossOrigin: config['crossOrigin']
   };
 };

test/spec/ol/source/wmts.test.js

@@ -31,6 +31,16 @@ describe('ol.source.WMTS', function() {
       expect(options).to.be(null);
     });
 
+    it('passes the crossOrigin option', function() {
+      var options = ol.source.WMTS.optionsFromCapabilities(capabilities, {
+        layer: 'BlueMarbleNextGeneration',
+        matrixSet: 'google3857',
+        crossOrigin: ''
+      });
+
+      expect(options.crossOrigin).to.be.eql('');
+    });
+
     it('can create KVP options from spec/ol/format/wmts/ogcsample.xml',
         function() {
           var options = ol.source.WMTS.optionsFromCapabilities(
@@ -59,6 +69,8 @@ describe('ol.source.WMTS', function() {
 
           expect(options.dimensions).to.eql({Time: '20110805'});
 
+          expect(options.crossOrigin).to.be(undefined);
+
         });
 
     it('can create REST options from spec/ol/format/wmts/ogcsample.xml',