[Representation] Spec ContextMenuGesture

Add spec for ContextMenuGesture, which exposes a menu
of applicable actions for objects when it is performed.
One of the built-in gestures supported by the
representation component, WTD-521.

platform/representation/src/gestures/ContextMenuGesture.js

@@ -4,15 +4,16 @@
  * Module defining ContextMenuGesture. Created by vwoeltje on 11/17/14.
  */
 define(
-    [],
+    ["./GestureConstants"],
-    function () {
+    function (GestureConstants) {
         "use strict";
 
         var MENU_TEMPLATE = "<mct-representation key=\"'context-menu'\" " +
                 "mct-object=\"domainObject\" " +
                 "ng-class=\"menuClass\"" +
                 "ng-style=\"menuStyle\">" +
-                "</mct-representation>";
+                "</mct-representation>",
+            dismissExistingMenu;
 
         /**
          * Add listeners to a view such that it launches a context menu for the
@@ -24,7 +25,7 @@ define(
             function showMenu(event) {
                 var winDim = [$window.innerWidth, $window.innerHeight],
                     eventCoors = [event.pageX, event.pageY],
-                    menuDim = [170, 200],
+                    menuDim = GestureConstants.MCT_MENU_DIMENSIONS,
                     body = $document.find('body'),
                     scope = $rootScope.$new(),
                     goLeft = eventCoors[0] + menuDim[0] > winDim[0],
@@ -35,16 +36,16 @@ define(
                 function dismiss() {
                     menu.remove();
                     body.off("click", dismiss);
-                    ContextMenuGesture.dismissExistingMenu = undefined;
+                    dismissExistingMenu = undefined;
                 }
 
                 // Dismiss any menu which was already showing
-                if (ContextMenuGesture.dismissExistingMenu) {
+                if (dismissExistingMenu) {
-                    ContextMenuGesture.dismissExistingMenu();
+                    dismissExistingMenu();
                 }
 
                 // ...and record the presence of this menu.
-                ContextMenuGesture.dismissExistingMenu = dismiss;
+                dismissExistingMenu = dismiss;
 
                 // Set up the scope, including menu positioning
                 scope.domainObject = domainObject;
@@ -73,8 +74,9 @@ define(
 
             return {
                 destroy: function () {
-                    if (ContextMenuGesture.dismissExistingMenu) {
+                    // Scope has been destroyed, so remove all listeners.
-                        ContextMenuGesture.dismissExistingMenu();
+                    if (dismissExistingMenu) {
+                        dismissExistingMenu();
                     }
                     element.off('contextmenu', showMenu);
                 }

platform/representation/src/gestures/GestureConstants.js

@@ -4,5 +4,6 @@
  * Module defining GestureConstants. Created by vwoeltje on 11/17/14.
  */
 define({
-    MCT_DRAG_TYPE: 'mct-domain-object-id'
+    MCT_DRAG_TYPE: 'mct-domain-object-id',
+    MCT_MENU_DIMENSIONS: [ 170, 200 ]
 });

platform/representation/test/gestures/ContextMenuGestureSpec.js

@@ -1,21 +1,136 @@
-/*global define,Promise*/
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
 
 /**
  * Module defining ContextMenuGestureSpec. Created by vwoeltje on 11/22/14.
  */
 define(
-    ["../../src/gestures/ContextMenuGesture"],
+    ["../../src/gestures/ContextMenuGesture", "../../src/gestures/GestureConstants"],
-    function (ContextMenuGesture) {
+    function (ContextMenuGesture, GestureConstants) {
         "use strict";
 
-        /**
+        var JQLITE_FUNCTIONS = [ "on", "off", "find", "append", "remove" ],
-         *
+            DOMAIN_OBJECT_METHODS = [ "getId", "getModel", "getCapability", "hasCapability", "useCapability" ];
-         * @constructor
-         */
-        function ContextMenuGestureSpec() {
-            return {};
-        }
 
-        return ContextMenuGestureSpec;
+        // ContextMenuGesture($compile, $document, $window, $rootScope, element, domainObject)
+
+        describe("The 'context menu' gesture", function () {
+            var mockCompile,
+                mockCompiledTemplate,
+                mockMenu,
+                mockDocument,
+                mockBody,
+                mockWindow,
+                mockRootScope,
+                mockScope,
+                mockElement,
+                mockDomainObject,
+                mockEvent,
+                gesture,
+                fireGesture;
+
+            beforeEach(function () {
+                mockCompile = jasmine.createSpy("$compile");
+                mockCompiledTemplate = jasmine.createSpy("template");
+                mockMenu = jasmine.createSpyObj("menu", JQLITE_FUNCTIONS);
+                mockDocument = jasmine.createSpyObj("$document", JQLITE_FUNCTIONS);
+                mockBody = jasmine.createSpyObj("body", JQLITE_FUNCTIONS);
+                mockWindow = { innerWidth: GestureConstants[0] * 4, innerHeight: GestureConstants[1] * 4 };
+                mockRootScope = jasmine.createSpyObj("$rootScope", ["$new"]);
+                mockScope = {};
+                mockElement = jasmine.createSpyObj("element", JQLITE_FUNCTIONS);
+                mockDomainObject = jasmine.createSpyObj("domainObject", DOMAIN_OBJECT_METHODS);
+                mockEvent = jasmine.createSpyObj("event", ["preventDefault"]);
+                mockEvent.pageX = 0;
+                mockEvent.pageY = 0;
+
+                mockCompile.andReturn(mockCompiledTemplate);
+                mockCompiledTemplate.andReturn(mockMenu);
+                mockDocument.find.andReturn(mockBody);
+                mockRootScope.$new.andReturn(mockScope);
+
+                gesture = new ContextMenuGesture(
+                    mockCompile,
+                    mockDocument,
+                    mockWindow,
+                    mockRootScope,
+                    mockElement,
+                    mockDomainObject
+                );
+
+                // Capture the contextmenu callback
+                fireGesture =  mockElement.on.mostRecentCall.args[1];
+            });
+
+            it("attaches a callback for context menu events", function () {
+                expect(mockElement.on).toHaveBeenCalledWith(
+                    "contextmenu",
+                    jasmine.any(Function)
+                );
+            });
+
+            it("detaches a callback for context menu events when destroyed", function () {
+                expect(mockElement.off).not.toHaveBeenCalled();
+
+                gesture.destroy();
+
+                expect(mockElement.off).toHaveBeenCalledWith(
+                    "contextmenu",
+                    mockElement.on.mostRecentCall.args[1]
+                );
+            });
+
+            it("compiles and adds a menu to the DOM on a contextmenu event", function () {
+                // Make sure that callback really is for the contextmenu event
+                expect(mockElement.on.mostRecentCall.args[0]).toEqual("contextmenu");
+
+                fireGesture(mockEvent);
+
+                expect(mockBody.append).toHaveBeenCalledWith(mockMenu);
+            });
+
+            it("prevents the default context menu behavior", function () {
+                fireGesture(mockEvent);
+                expect(mockEvent.preventDefault).toHaveBeenCalled();
+            });
+
+            it("removes a menu when body is clicked", function () {
+                // Show the menu
+                fireGesture(mockEvent);
+
+                // Verify precondition
+                expect(mockBody.off).not.toHaveBeenCalled();
+
+                // Find and fire body's click listener
+                mockBody.on.calls.forEach(function (call) {
+                    if (call.args[0] === 'click') {
+                        call.args[1]();
+                    }
+                });
+
+                // Menu should have been removed
+                expect(mockMenu.remove).toHaveBeenCalled();
+
+                // Listener should have been detached from body
+                expect(mockBody.off).toHaveBeenCalled();
+            });
+
+            it("removes listeners from body if destroyed while menu is showing", function () {
+                // Show the menu
+                fireGesture(mockEvent);
+
+                // Verify preconditions
+                expect(mockBody.off).not.toHaveBeenCalled();
+                expect(mockMenu.remove).not.toHaveBeenCalled();
+
+                // Destroy the menu
+                gesture.destroy();
+
+                // Verify menu was removed and listener detached
+                expect(mockBody.off).toHaveBeenCalled();
+                expect(mockMenu.remove).toHaveBeenCalled();
+            });
+
+        });
     }
 );