public void ThrowCorrectExceptionIfSenderIsNull()
{
var ex = Assert.Throws <ArgumentNullException>(() => CollectionChangedEventHandlers <int, int> .Handle(null, null));
Assert.IsNotNull(ex);
Assert.AreEqual("sender", ex.ParamName);
}
public void ThrowCorrectExceptionIfEventArgsIsNull()
{
var sender = new Mock <ICollectionChangedEventSource <int, int> >();
var ex = Assert.Throws <ArgumentNullException>(
() => CollectionChangedEventHandlers <int, int> .Handle(sender.Object, null));
Assert.IsNotNull(ex);
Assert.AreEqual("e", ex.ParamName);
}
public void SenderNullCollectionItemSourceDoesNotThrowExceptionWhenChangeActionIsReset()
{
var sender = new Mock <ICollectionChangedEventSource <int, int> >();
// ReSharper disable once PossibleNullReferenceException => How Moq initializes expected scenarios, not null.
sender.Setup(s => s.CollectionItemSource).Returns((IEnumerable <int>)null);
var notifyCollectionChangedEventArgs = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, null);
CollectionChangedEventHandlers <int, int> .Handle(sender.Object, notifyCollectionChangedEventArgs);
}