public void RemoveAddedEventHandler()
{
var component = new DescriptorTestComponent();
Action eventHandler = () => Assert.True(false, "EventDescriptor failed to remove an event handler");
EventDescriptor eventDescriptor = TypeDescriptor.CreateEvent(component.GetType(), nameof(component.ActionEvent), typeof(Action));
eventDescriptor.AddEventHandler(component, eventHandler);
eventDescriptor.RemoveEventHandler(component, eventHandler);
// component.Event should now have no handler => raising it should throw a NullReferenceException
Assert.Throws <NullReferenceException>(() => component.RaiseEvent());
}
public void RemoveAddedEventHandler()
{
var component = new DescriptorTestComponent();
Action eventHandler = () => Assert.True(false, "EventDescriptor failed to remove an event handler");
EventDescriptor eventDescriptor = TypeDescriptor.CreateEvent(component.GetType(), nameof(component.ActionEvent), typeof(Action));
eventDescriptor.AddEventHandler(component, eventHandler);
eventDescriptor.RemoveEventHandler(component, eventHandler);
// component.Event should now have no handler => raising it should throw a NullReferenceException
Assert.Throws(typeof(NullReferenceException), () => component.RaiseEvent());
}
public void RaiseAddedEventHandler()
{
var component = new DescriptorTestComponent();
var eventHandlerWasCalled = false;
Action eventHandler = () => eventHandlerWasCalled = true;
var eventInfo = typeof(DescriptorTestComponent).GetEvent(nameof(DescriptorTestComponent.ActionEvent));
EventDescriptor eventDescriptor = TypeDescriptor.CreateEvent(component.GetType(), nameof(component.ActionEvent), typeof(Action));
eventDescriptor.AddEventHandler(component, eventHandler);
component.RaiseEvent();
Assert.True(eventHandlerWasCalled);
}
public void RaiseAddedEventHandler()
{
var component = new DescriptorTestComponent();
var eventHandlerWasCalled = false;
Action eventHandler = () => eventHandlerWasCalled = true;
var eventInfo = typeof(DescriptorTestComponent).GetTypeInfo().GetEvent(nameof(DescriptorTestComponent.ActionEvent));
EventDescriptor eventDescriptor = TypeDescriptor.CreateEvent(component.GetType(), nameof(component.ActionEvent), typeof(Action));
eventDescriptor.AddEventHandler(component, eventHandler);
component.RaiseEvent();
Assert.True(eventHandlerWasCalled);
}