public void TestBatchableViewModel_InBatchMode_ChangeProperty_NoPropertyChangedFired()
    {
      var vm = new TestBatchableViewModel();
      var propertyName = String.Empty;
      var listOfPropertyNames = new List<string>();
      var expectedName = nameof(vm.Name);

      vm.PropertyChanged += (sender, args) => { propertyName = args?.PropertyName; };
      vm.PropertyChanged += (sender, args) => { listOfPropertyNames.Add(args?.PropertyName); };

      vm.Begin_ViewModelUpdates();
      vm.Name = "We are updating the name property and expecting it to fire the Property Changed on the name";
      vm.End_ViewModelUpdates();

      UnitTesting.Assert.AreEqual<string>(String.Empty, propertyName);
      UnitTesting.CollectionAssert.DoesNotContain(listOfPropertyNames, expectedName);
      UnitTesting.Assert.AreEqual(0, listOfPropertyNames.Count);
    }
    public void TestBatchableViewModel_InBatchMode_ChangeModelProperty_NoPropertyChangedFired()
    {
      var listOfPropertyNames = new List<string>();
      var vm = new TestBatchableViewModel();
      vm.PropertyChanged += (sender, args) => { listOfPropertyNames.Add(args?.PropertyName); };

      vm.Begin_ViewModelUpdates();
      vm.SetBackingModel(new TestModel(name: "Test", id: 1));
      vm.End_ViewModelUpdates();

      var expectedListOfNames = new List<string>() { "Model", nameof(vm.Name), nameof(vm.ID) };

      Assert.IsFalse(expectedListOfNames.Except(listOfPropertyNames).Count() == 0, $"Nothing should have fired...uh oh...: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}].");
      Assert.IsTrue(listOfPropertyNames.Except(expectedListOfNames).Count() == 0, $"Nothing should have fired...uh oh...: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}].");

      Assert.AreEqual(0, listOfPropertyNames.Count, "No names should have fired...uh oh...");

      CollectionAssert.AreNotEqual(expectedListOfNames, listOfPropertyNames, $"The expected properties of the TestViewModel: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}]. They fired in an incorrect order...");
    }
 public void TestBatchableViewModel_NotInBatchMode_EndBatchMode_ErrorsSpecific()
 {
   var vm = new TestBatchableViewModel();
   vm.End_ViewModelUpdates();
 }