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();
}