More docs and unit tests.

lib/OpenLayers/WPSProcess.js

@@ -230,9 +230,13 @@ OpenLayers.WPSProcess = OpenLayers.Class({
                 (function callback() {
                     OpenLayers.Util.removeItem(me.executeCallbacks, callback);
                     if (me.chained !== 0) {
+                        // need to wait until chained processes have a
+                        // description and configuration - see chainProcess
                         me.executeCallbacks.push(callback);
                         return;
                     }
+                    // all chained processes are added as references now, so
+                    // let's proceed.
                     OpenLayers.Request.POST({
                         url: me.client.servers[me.server].url,
                         data: new OpenLayers.Format.WPSExecute().write(me.description),
@@ -487,15 +491,33 @@ OpenLayers.WPSProcess = OpenLayers.Class({
 
 /**
  * Class: OpenLayers.WPSProcess.ChainLink
+ * Type for chaining processes.
  */
 OpenLayers.WPSProcess.ChainLink = OpenLayers.Class({
     
+    /**
+     * Property: process
+     * {<OpenLayers.WPSProcess>} The process to chain
+     */
     process: null,
     
+    /**
+     * Property: output
+     * {String} The output identifier of the output we are going to use as
+     *     input for another process.
+     */
     output: null,
     
+    /**
+     * Constructor: OpenLayers.WPSProcess.ChainLink
+     *
+     * Parameters:
+     * options - {Object} Properties to set on the instance.
+     */
     initialize: function(options) {
         OpenLayers.Util.extend(this, options);
-    }
+    },
+    
+    CLASS_NAME: "OpenLayers.WPSProcess.ChainLink"
     
 });