public void Constructor_does_not_raise_an_exception()
{
// Act
var sut = new EventRaisingList <Person> (_source);
// Assert
Assert.NotNull(sut);
}
public void Set_Item_modifies_source_list()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
// Act
sut [1] = Replacement;
// Assert
Assert.AreSame(Replacement, _source [1]);
}
public void Get_Item_returns_correct_item()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
// Act
var result = sut [1];
// Assert
Assert.AreEqual(_source [1], result);
}
public void Set_Item_invokes_before_add_callback()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
sut.BeforeAdd += RecordingCallbackOne;
// Act
sut [1] = Replacement;
sut.BeforeAdd -= RecordingCallbackOne;
// Assert
Assert.IsTrue(CallbackOneCalled);
}
public void Insert_includes_index_of_new_item()
{
var sut = new EventRaisingList <Person> (_source);
AfterModifyEventArgs <Person> capturedArgs = default;
void OnAfterAdd(object sender, AfterModifyEventArgs <Person> args) => capturedArgs = args;
sut.AfterAdd += OnAfterAdd;
sut.Insert(1, new Person());
sut.AfterAdd -= OnAfterAdd;
Assert.That(capturedArgs, Is.InstanceOf <AfterModifyListEventArgs <Person> >().And.Property(nameof(IHasListIndex.Index)).EqualTo(1));
}
public void RemoveAt_includes_index_of_removed_item()
{
var sut = new EventRaisingList <Person> (_source);
AfterModifyEventArgs <Person> capturedArgs = default;
void OnAfterRemove(object sender, AfterModifyEventArgs <Person> args) => capturedArgs = args;
sut.AfterRemove += OnAfterRemove;
sut.RemoveAt(1);
sut.AfterRemove -= OnAfterRemove;
Assert.That(capturedArgs, Is.InstanceOf <AfterModifyListEventArgs <Person> >().And.Property(nameof(IHasListIndex.Index)).EqualTo(1));
}
public void RemoveAt_triggers_CollectionChanged()
{
var sut = new EventRaisingList <Person> (_source);
NotifyCollectionChangedEventArgs capturedArgs = default;
void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args) => capturedArgs = args;
sut.CollectionChanged += OnCollectionChanged;
sut.RemoveAt(1);
sut.CollectionChanged -= OnCollectionChanged;
Assert.That(capturedArgs, Is.Not.Null);
}
public void Set_Item_does_not_replace_item_if_before_add_cancels()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
sut.BeforeAdd += CancellingCallback;
// Act
sut [1] = Replacement;
sut.BeforeAdd -= CancellingCallback;
// Assert
Assert.AreNotSame(Replacement, _source [1]);
}
public void Set_Item_does_not_trigger_after_add_if_before_add_cancels()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
sut.BeforeAdd += CancellingCallback;
sut.AfterAdd += RecordingCallbackOne;
// Act
sut [1] = Replacement;
sut.BeforeAdd -= CancellingCallback;
sut.AfterAdd -= RecordingCallbackOne;
// Assert
Assert.IsFalse(CallbackOneCalled);
}
public void Insert_triggers_both_add_events()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
sut.BeforeAdd += RecordingCallbackOne;
sut.AfterAdd += RecordingCallbackTwo;
// Act
sut.Insert(1, new Person());
sut.BeforeRemove -= RecordingCallbackOne;
sut.AfterRemove -= RecordingCallbackTwo;
// Assert
Assert.IsTrue(CallbackOneCalled, "Callback one");
Assert.IsTrue(CallbackTwoCalled, "Callback two");
}
public void RemoveAt_triggers_both_remove_events()
{
// Arrange
var sut = new EventRaisingList <Person> (_source);
sut.BeforeRemove += RecordingCallbackOne;
sut.AfterRemove += RecordingCallbackTwo;
// Act
sut.RemoveAt(1);
sut.BeforeRemove -= RecordingCallbackOne;
sut.AfterRemove -= RecordingCallbackTwo;
// Assert
Assert.IsTrue(CallbackOneCalled, "Callback one");
Assert.IsTrue(CallbackTwoCalled, "Callback two");
}
