Implement tests for SettingsViewModel add and add child commands.

Tests/ViewModels/SettingsViewModelTest.cs

@@ -40,13 +40,52 @@ namespace Tests.ViewModels
         [Test]
         public void AddElement()
         {
-
+            bool messageSent = false;
+            Settings model = _settingsVM.RevealModelObject() as Settings;
+            int oldViewModelElementCount = _settingsVM.Elements.Count;
+            int oldModelElementCount = model.Elements.Count;
+            _settingsVM.AddElementMessage.Sent += (sender, args) =>
+            {
+                messageSent = true;
+                ElementPickerViewModel picker = args.Content.ViewModel as ElementPickerViewModel;
+                Assert.IsNotNull(picker, "ViewModel in MessageContent is not an ElementPickerViewModel");
+                picker.Categories.First().Children.First().IsSelected = true;
+                picker.ChooseElementCommand.Execute(null);
+            };
+            _settingsVM.AddElementCommand.Execute(null);
+            Assert.IsTrue(messageSent, "Message was not sent");
+            Assert.AreEqual(oldViewModelElementCount + 1, _settingsVM.Elements.Count,
+                "Count of elements in ViewModel was not increased by 1");
+            Assert.AreEqual(oldModelElementCount + 1, model.Elements.Count,
+                "Count of elements in settings Model was not increased by 1");
         }
 
         [Test]
         public void AddChildElement()
         {
-
+            bool messageSent = false;
+            SelectEachDay model = new SelectEachDay();
+            ControlElementViewModel viewModel = new ControlElementViewModel(model);
+            _settingsVM.AddElementViewModel(viewModel);
+            viewModel.IsSelected = true;
+            int oldViewModelChildrenCount = viewModel.Elements.Count;
+            int oldModelChildrenCount = model.FormatElements.Count;
+            _settingsVM.AddChildElementMessage.Sent += (sender, args) =>
+            {
+                messageSent = true;
+                ElementPickerViewModel picker = args.Content.ViewModel as ElementPickerViewModel;
+                Assert.IsNotNull(picker, "ViewModel in MessageContent is not an ElementPickerViewModel");
+                picker.Categories.First().Children.First().IsSelected = true;
+                Assert.IsTrue(picker.ChooseElementCommand.CanExecute(null),
+                    "Cannot execute element picker's ChooseElementCommand.");
+                picker.ChooseElementCommand.Execute(null);
+            };
+            _settingsVM.AddChildElementCommand.Execute(null);
+            Assert.IsTrue(messageSent, "Message was not sent");
+            Assert.AreEqual(oldViewModelChildrenCount + 1, viewModel.Elements.Count,
+                "Count of children in ViewModel was not increased by 1");
+            Assert.AreEqual(oldModelChildrenCount + 1, model.FormatElements.Count,
+                "Count of children in Model was not increased by 1");
         }
 
         [Test]
@@ -67,13 +106,13 @@ namespace Tests.ViewModels
         [Test]
         public void DeleteElement()
         {
-
+            throw new NotImplementedException();
         }
 
         [Test]
         public void CopyElement()
         {
-
+            throw new NotImplementedException();
         }
     }
 }