public void NotifyCommand()
{
var callbackRaised = false;
EventHandler eventHandler = (s, a) =>
{
callbackRaised = true;
};
this.TestCommand.CanExecuteChanged += eventHandler;
try
{
this.Property = "Alter Wert";
var monitor = IListenerHostExtensions.Listen(this, v => v.Property)
.Notify(() => this.TestCommand);
this.Property = "Neuer Wert";
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(this.Property)));
Assert.IsTrue(callbackRaised);
}
finally
{
this.TestCommand.CanExecuteChanged -= eventHandler;
}
}
public void NotifyViewModel()
{
var callbackRaised = false;
PropertyChangedEventHandler eventHandler = (s, a) =>
{
if (a.PropertyName == nameof(this.ViewModel.Property))
{
callbackRaised = true;
}
};
this.ViewModel.PropertyChanged += eventHandler;
try
{
this.Property = "Alter Wert";
var monitor = IListenerHostExtensions.Listen(this, v => v.Property)
.Notify(() => this.ViewModel.Property);
this.Property = "Neuer Wert";
Assert.IsFalse(callbackRaised);
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(this.Property)));
Assert.IsTrue(callbackRaised);
}
finally
{
this.ViewModel.PropertyChanged -= eventHandler;
}
}
public void NotifyViewModel_Fail_Type()
{
var target = new List <string>();
var monitor = IListenerHostExtensions
.Listen(this, v => v.Property)
.Notify(() => target.Count);
}
public void ListenExpression()
{
var monitor1 = IListenerHostExtensions.Listen(this, v => v.Property);
Assert.IsNotNull(monitor1);
var monitor2 = IListenerHostExtensions.Monitor(this, this.ViewModel, v => v.Property);
Assert.IsNotNull(monitor2);
Assert.AreNotEqual(monitor1, monitor2);
}
public void CallBack()
{
var callbackRaised = false;
Action a = () => callbackRaised = true;
this.Property = "Alter Wert";
var monitor = IListenerHostExtensions.Listen(this, v => v.Property)
.Call(a);
this.Property = "Neuer Wert";
Assert.IsFalse(callbackRaised);
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(this.Property)));
Assert.IsTrue(callbackRaised);
}
public void ListenExpression_Fail_Expression()
{
var monitor1 = IListenerHostExtensions.Listen(this, v => 42);
}
public void NotifyViewModel_Fail_Expression()
{
var monitor = IListenerHostExtensions
.Listen(this, v => v.Property)
.Notify(() => 42);
}