/// <summary>
/// Removes an item from a <see cref="ICollection{T}"/> as a <see cref="IUnDo"/> operation.
/// </summary>
/// <typeparam name="T">The type of element in the <see cref="ICollection{T}"/>.</typeparam>
/// <param name="manager">The <see cref="IUnDoManager"/>.</param>
/// <param name="source">The <see cref="ICollection{T}"/>.</param>
/// <param name="item">The item to remove.</param>
/// <param name="description">The description of the operation.</param>
/// <returns>true if the command has been created, false if not because <paramref name="source"/> did not contained <paramref name="item"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="manager"/> or <paramref name="source"/> is null.</exception>
public static bool DoRemove <T>(this IUnDoManager manager, ICollection <T> source, T item, object description = null)
{
if (manager is null)
{
throw new ArgumentNullException(nameof(manager));
}
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
bool result = false;
if (source is IList <T> list)
{
int index = list.IndexOf(item);
if (index >= 0)
{
manager.DoRemoveAt(list, index, description);
result = true;
}
}
else if (source.Contains(item))
{
manager.Do(new CollectionUnDo <T>(description, source, item, false));
result = true;
}
return(result);
}
public void DoRemoveAt_Should_throw_ArgumentNullException_When_source_is_null()
{
IUnDoManager manager = Substitute.For <IUnDoManager>();
IList <object> source = null;
Check
.ThatCode(() => manager.DoRemoveAt(source, 0))
.Throws <ArgumentNullException>()
.WithProperty("ParamName", "source");
}
