Fix specs.

atom/browser/api/lib/menu.coffee

@@ -68,6 +68,7 @@ Menu::insert = (pos, item) ->
       @groupsMap[item.groupId].push item
 
       # Setting a radio menu item should flip other items in the group.
+      v8Util.setHiddenValue item, 'checked', item.checked
       Object.defineProperty item, 'checked',
         enumerable: true
         get: -> v8Util.getHiddenValue item, 'checked'

spec/api-menu-spec.coffee

@@ -36,13 +36,20 @@ describe 'menu module', ->
       ]
       menu.delegate.executeCommand menu.items[0].commandId
 
-  describe 'radio MenuItem', ->
-    it 'clicking an item should flip the checked property', ->
-      menu = Menu.buildFromTemplate [ label: 'text', type: 'radio' ]
+  describe 'MenuItem with checked property', ->
+    it 'clicking an checkbox item should flip the checked property', ->
+      menu = Menu.buildFromTemplate [ label: 'text', type: 'checkbox' ]
       assert.equal menu.items[0].checked, false
       menu.delegate.executeCommand menu.items[0].commandId
       assert.equal menu.items[0].checked, true
 
+    it 'clicking an radio item should always make checked property true', ->
+      menu = Menu.buildFromTemplate [ label: 'text', type: 'radio' ]
+      menu.delegate.executeCommand menu.items[0].commandId
+      assert.equal menu.items[0].checked, true
+      menu.delegate.executeCommand menu.items[0].commandId
+      assert.equal menu.items[0].checked, true
+
     it 'at least have one item checked in each group', ->
       template = []
       template.push label: "#{i}", type: 'radio' for i in [0..10]