[Forms] Fill in specs

Fill in specs for scripts which support the mct-form
and mct-control directives. WTD-530.

platform/forms/test/MCTControlSpec.js

@@ -6,6 +6,54 @@ define(
         "use strict";
 
         describe("The mct-control directive", function () {
+            var testControls,
+                mockScope,
+                mctControl;
+
+            beforeEach(function () {
+                testControls = [
+                    {
+                        key: "abc",
+                        bundle: { path: "a", resources: "b" },
+                        templateUrl: "c/template.html"
+                    },
+                    {
+                        key: "xyz",
+                        bundle: { path: "x", resources: "y" },
+                        templateUrl: "z/template.html"
+                    }
+                ];
+
+                mockScope = jasmine.createSpyObj("$scope", [ "$watch" ]);
+
+                mctControl = new MCTControl(testControls);
+            });
+
+            it("is restricted to the element level", function () {
+                expect(mctControl.restrict).toEqual("E");
+            });
+
+            it("watches its passed key to choose a template", function () {
+                mctControl.controller(mockScope);
+
+                expect(mockScope.$watch).toHaveBeenCalledWith(
+                    "key",
+                    jasmine.any(Function)
+                );
+            });
+
+            it("changes its template dynamically", function () {
+                mctControl.controller(mockScope);
+
+                mockScope.key = "xyz";
+                mockScope.$watch.mostRecentCall.args[1]("xyz");
+
+                // Should have communicated the template path to
+                // ng-include via the "inclusion" field in scope
+                expect(mockScope.inclusion).toEqual(
+                    "x/y/z/template.html"
+                );
+            });
 
         });
     }