public void TestViewModel_ChangeProperty_PropertyChangedFired()
{
var vm = new TestViewModel();
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.Name = "We are updating the name property and expecting it to fire the Property Changed on the name";
UnitTesting.Assert.AreEqual<string>(propertyName, expectedName);
UnitTesting.CollectionAssert.Contains(listOfPropertyNames, expectedName);
UnitTesting.Assert.IsTrue(listOfPropertyNames.Count == 1);
}
public void TestViewModel_ChangeModelProperty_AllPropertyChangedFired()
{
var listOfPropertyNames = new List<string>();
var vm = new TestViewModel();
vm.PropertyChanged += (sender, args) => { listOfPropertyNames.Add(args?.PropertyName); };
vm.SetBackingModel(new TestModel(name: "Test", id: 1));
var expectedListOfNames = new List<string>() { "Model", nameof(vm.Name), nameof(vm.ID) };
Assert.IsTrue(expectedListOfNames.Except(listOfPropertyNames).Count() == 0, $"All property names expected are NOT in the fired list: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}].");
Assert.IsTrue(listOfPropertyNames.Except(expectedListOfNames).Count() == 0, $"All property names fired are NOT in the expected list: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}].");
CollectionAssert.AreEqual(expectedListOfNames, listOfPropertyNames, $"The expected properties of the TestViewModel: expected:[{HelperMethods.GetStringFromCollection(expectedListOfNames)}], fired:[{HelperMethods.GetStringFromCollection(listOfPropertyNames)}]. They fired in an incorrect order...");
}
public void TestViewModel_ChangeProperty_PropertyChangeFired_ControlTest()
{
var vm = new TestViewModel();
var listOfPropertyNames = new List<string>();
var expectedName = nameof(vm.Name);
var propertyName = String.Empty;
Action<object, PropertyChangedEventArgs> action = (sender, args) => { propertyName = args.PropertyName; };
Action<object, PropertyChangedEventArgs> action2 = (sender, args) => { listOfPropertyNames.Add(args?.PropertyName); };
action(null, new PropertyChangedEventArgs(expectedName));
action2(null, new PropertyChangedEventArgs(expectedName));
UnitTesting.Assert.AreEqual<string>(propertyName, expectedName);
UnitTesting.CollectionAssert.Contains(listOfPropertyNames, expectedName);
UnitTesting.Assert.IsTrue(listOfPropertyNames.Count == 1);
}
