public void Constructor_does_not_raise_an_exception()
{
// Act
var sut = new EventRaisingCollection <Person> (_source);
// Assert
Assert.NotNull(sut);
}
public void Remove_triggers_CollectionChanged()
{
var sut = new EventRaisingCollection <Person> (_source);
NotifyCollectionChangedEventArgs capturedArgs = default;
void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args) => capturedArgs = args;
sut.CollectionChanged += OnCollectionChanged;
sut.Remove(SourceCollection.First());
sut.CollectionChanged -= OnCollectionChanged;
Assert.That(capturedArgs, Is.Not.Null);
}
public void Remove_triggers_both_remove_events()
{
// Arrange
var sut = new EventRaisingCollection <Person> (_source);
sut.BeforeRemove += RecordingCallbackOne;
sut.AfterRemove += RecordingCallbackTwo;
// Act
sut.Remove(SourceCollection.First());
sut.BeforeRemove -= RecordingCallbackOne;
sut.AfterRemove -= RecordingCallbackTwo;
// Assert
Assert.IsTrue(CallbackOneCalled, "Callback one");
Assert.IsTrue(CallbackTwoCalled, "Callback two");
}
public void Add_triggers_both_add_events()
{
// Arrange
var sut = new EventRaisingCollection <Person> (_source);
sut.BeforeAdd += RecordingCallbackOne;
sut.AfterAdd += RecordingCallbackTwo;
// Act
sut.Add(new Person());
sut.BeforeRemove -= RecordingCallbackOne;
sut.AfterRemove -= RecordingCallbackTwo;
// Assert
Assert.IsTrue(CallbackOneCalled, "Callback one");
Assert.IsTrue(CallbackTwoCalled, "Callback two");
}
public void Clear_triggers_both_remove_events_for_every_item()
{
// Arrange
int beforeRemoveCalls = 0, afterRemoveCalls = 0;
var sut = new EventRaisingCollection <Person> (_source);
EventHandler <BeforeModifyEventArgs <Person> > incrementBefore = (sender, e) => beforeRemoveCalls++;
EventHandler <AfterModifyEventArgs <Person> > incrementAfter = (sender, e) => afterRemoveCalls++;
sut.BeforeRemove += incrementBefore;
sut.AfterRemove += incrementAfter;
// Act
sut.Clear();
sut.BeforeRemove -= incrementBefore;
sut.AfterRemove -= incrementAfter;
// Assert
Assert.AreEqual(SourceCollection.Count, beforeRemoveCalls, "Before remove");
Assert.AreEqual(SourceCollection.Count, afterRemoveCalls, "After remove");
}
