[Edit] Add EditToolbarRepresenter spec

Add tests for representer which mediates between view's
selection and toolbar contents, WTD-878.

platform/commonUI/edit/src/representers/EditToolbarRepresenter.js

@@ -37,7 +37,9 @@ define(
 
             // Update selection models to match changed toolbar state
             function updateState(state) {
-                state.forEach(toolbar.updateState);
+                state.forEach(function (value, index) {
+                    toolbar.updateState(index, value);
+                });
             }
 
             // Represent a domain object using this definition