public void TestPropertyChangedSend()
{
Messenger.Reset();
var receivedDateTimeMessengerOld = DateTime.MaxValue;
var receivedDateTimeMessengerNew = DateTime.MinValue;
var receivedDateTimeLocal = DateTime.MinValue;
Messenger.Default.Register<PropertyChangedMessage<DateTime>>(this, m =>
{
if (m.PropertyName == TestViewModel.LastChanged1PropertyName)
{
receivedDateTimeMessengerOld = m.OldValue;
receivedDateTimeMessengerNew = m.NewValue;
}
});
var vm = new TestViewModel();
vm.PropertyChanged += (s, e) =>
{
if (e.PropertyName == TestViewModel.LastChanged1PropertyName)
{
receivedDateTimeLocal = vm.LastChanged1;
}
};
var now = DateTime.Now;
vm.LastChanged1 = now;
Assert.AreEqual(now, vm.LastChanged1);
Assert.AreEqual(DateTime.MinValue, receivedDateTimeMessengerOld);
Assert.AreEqual(now, receivedDateTimeMessengerNew);
Assert.AreEqual(now, receivedDateTimeLocal);
}
public void TestDispose()
{
Messenger.Reset();
var vm = new TestViewModel();
Messenger.Default.Register<string>(vm, vm.HandleStringMessage);
const string Content1 = "Hello world";
const string Content2 = "Another message";
Messenger.Default.Send(Content1);
Assert.AreEqual(Content1, vm.ReceivedContent);
vm.Dispose();
Messenger.Default.Send(Content2);
Assert.AreEqual(Content1, vm.ReceivedContent);
}
public void TestCleanup()
{
Messenger.Reset();
var vm = new TestViewModel();
Messenger.Default.Register<string>(vm, vm.HandleStringMessage);
const string Content1 = "Hello world";
const string Content2 = "Another message";
Messenger.Default.Send(Content1);
Assert.AreEqual(Content1, vm.ReceivedContent);
var cleanupVm = vm as ICleanup;
cleanupVm.Cleanup();
Assert.IsTrue(vm.CleanupWasCalled);
Messenger.Default.Send(Content2);
Assert.AreEqual(Content1, vm.ReceivedContent);
}
public void TestPropertyChangedSendWithCustomMessenger()
{
var receivedDateTime1 = DateTime.MinValue;
var receivedDateTime2 = DateTime.MinValue;
var messenger = new Messenger();
messenger.Register<PropertyChangedMessage<DateTime>>(this, m => receivedDateTime1 = m.NewValue);
Messenger.Default.Register<PropertyChangedMessage<DateTime>>(this, m => receivedDateTime2 = m.NewValue);
var vm = new TestViewModel(messenger);
var now = DateTime.Now;
vm.LastChanged1 = now;
Assert.AreEqual(now, vm.LastChanged1);
Assert.AreEqual(now, receivedDateTime1);
Assert.AreEqual(DateTime.MinValue, receivedDateTime2);
}
public void TestPropertyChangeNoBroadcast()
{
Messenger.Reset();
var receivedDateTimeLocal = DateTime.MinValue;
var receivedDateTimeMessenger = DateTime.MinValue;
Messenger.Default.Register<PropertyChangedMessage<DateTime>>(this, m =>
{
if (m.PropertyName == TestViewModel.LastChanged2PropertyName)
{
receivedDateTimeMessenger = m.NewValue;
}
});
var vm = new TestViewModel();
vm.PropertyChanged += (s, e) =>
{
if (e.PropertyName == TestViewModel.LastChanged2PropertyName)
{
receivedDateTimeLocal = vm.LastChanged2;
}
};
var now = DateTime.Now;
vm.LastChanged2 = now;
Assert.AreEqual(now, vm.LastChanged2);
Assert.AreEqual(now, receivedDateTimeLocal);
Assert.AreEqual(DateTime.MinValue, receivedDateTimeMessenger);
}