using System.Collections.Generic;

using NUnit.Framework;



namespace Delta.Utilities.Collections

{

	/// <summary>

	/// Class extensions

	/// </summary>

	public static class ListExtensions

	{

		#region Clone (Static)

		/// <summary>

		/// Clone given list via array copy and return a new list that has each

		/// item copied into (deep copy).

		/// </summary>

		/// <param name="anyList">Any list</param>

		/// <returns>Cloned list</returns>

		public static List<T> Clone<T>(this List<T> anyList)

		{

			if (anyList == null ||

			    anyList.Count == 0)

			{

				return new List<T>();

			}

			else

			{

				T[] dataCopy = new T[anyList.Count];

				anyList.CopyTo(dataCopy);

				return new List<T>(dataCopy);

			}

		}

		#endregion



		/// <summary>

		/// Tests

		/// </summary>

		internal class ListExtensionsTests

		{

			#region Clone

			/// <summary>

			/// Clone

			/// </summary>

			[Test]

			public void Clone()

			{

				List<int> data = new List<int>(new[]

				{

					0, 1, 2,

				});

				List<int> clonedData = data.Clone();



				for (int index = 0; index < data.Count; index++)

				{

					Assert.Equal(clonedData[index], data[index]);

				}

			}

			#endregion

		}

	}

}