public void WeakEventManager_NullEventManager()
{
// Arrange
WeakEventManager <string>?unassignedEventManager = null;
// Act
// Assert
#pragma warning disable CS8602 //Dereference of a possible null reference
Assert.Throws <NullReferenceException>(() => unassignedEventManager.RaiseEvent(this, string.Empty, nameof(TestEvent)));
#pragma warning restore CS8602
}
public void WeakEventManager_UnassignedEventManager()
{
// Arrange
var unassignedEventManager = new WeakEventManager();
var didEventFire = false;
TestEvent += HandleTestEvent;
void HandleTestEvent(object?sender, EventArgs e) => didEventFire = true;
// Act
unassignedEventManager.RaiseEvent(null, null, nameof(TestEvent));
// Assert
Assert.False(didEventFire);
TestEvent -= HandleTestEvent;
}
public void WeakEventManagerTEventArgs_UnassignedEventManager()
{
// Arrange
var unassignedEventManager = new WeakEventManager <string>();
var didEventFire = false;
TestStringEvent += HandleTestEvent;
void HandleTestEvent(object?sender, string e) => didEventFire = true;
// Act
#pragma warning disable CS8625 //Cannot convert null literal to non-nullable reference type
unassignedEventManager.RaiseEvent(null, null, nameof(TestStringEvent));
#pragma warning restore CS8625
// Assert
Assert.False(didEventFire);
TestStringEvent -= HandleTestEvent;
}
protected void OnSourceChanged() => weakEventManager.RaiseEvent(this, EventArgs.Empty, nameof(SourceChanged));
void OnResumed() => resumedEventManager.RaiseEvent(this, System.EventArgs.Empty, nameof(Resumed));
void OnBoxLayoutUpdated(object sender, LayoutEventArgs e) => weakEventManager.RaiseEvent(this, e, nameof(LayoutUpdated));
public void RaiseEventShouldInvokeAddedHandler()
{ var raised = false;
EventHandler handler = ( s, e ) => raised = true;
var target = new WeakEventManager<EventHandler, EventArgs>();
target.AddHandler( handler );
target.RaiseEvent( this, EventArgs.Empty );
Assert.True( raised );
}