WMSGetFeatureInfo Control does not allow for different infoFormats per layer, r=erilem, thanks erilem for the quick review, api docs now have instructions for this (closes 3176)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11716 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/Control/WMSGetFeatureInfo.html

@@ -420,7 +420,7 @@
     }
 
     function test_drillDown(t) {
-        t.plan(4);
+        t.plan(6);
         var map = new OpenLayers.Map("map", {
             getExtent: function() {return(new OpenLayers.Bounds(-180,-90,180,90));}
             }
@@ -434,14 +434,17 @@
             layers: "c"
         });
 
+        // this service does not support application/vnd.ogc.gml for GetFeatureInfo, only text/xml
         var c = new OpenLayers.Layer.WMS("dummy","http://myhost/wms", {
-            layers: "x"
+            layers: "x",
+            info_format: "text/xml"
         });
 
         map.addLayers([a, b, c]);
 
         var click = new OpenLayers.Control.WMSGetFeatureInfo({
-            drillDown: true
+            drillDown: true,
+            infoFormat: "application/vnd.ogc.gml"
         });
 
         map.addControl(click);
@@ -451,9 +454,11 @@
         OpenLayers.Request.GET = function(options) {
             count++;
             if (count == 1) {
+                t.eq(options.params["INFO_FORMAT"], "application/vnd.ogc.gml", "Default info format of the control is used");
                 t.eq(options.params["QUERY_LAYERS"].join(","), "a,c", "Layers should be grouped by service url");
                 t.eq(options.url, "http://localhost/wms", "Correct url used for first request");
             } else if (count == 2) {
+                t.eq(options.params["INFO_FORMAT"], "text/xml", "Overridden info format is used instead of the control's infoFormat");
                 t.eq(options.url, "http://myhost/wms", "Correct url used for second request");
             }
         };