New tests added. AddRangeShouldAddItemsInCorrectOrder & AddRangeShouldNotOverrideItems converted to theories with [MemberData]

Recyclable.CollectionsTests/CustomIList.cs

@@ -0,0 +1,33 @@
+using System.Collections;
+
+namespace Recyclable.CollectionsTests
+{
+	public class CustomIList<T> : IList<T>
+	{
+		protected List<T> _list;
+
+		public CustomIList()
+		{
+			_list = new List<T>();
+		}
+
+		public CustomIList(IEnumerable<T> items)
+		{
+			_list = new List<T>(items);
+		}
+
+		public T this[int index] { get => _list[index]; set => _list[index] = value; }
+		public int Count => _list.Count;
+		public bool IsReadOnly => false;
+		public void Add(T item) => _list.Add(item);
+		public void Clear() => _list.Clear();
+		public bool Contains(T item) => _list.Contains(item);
+		public void CopyTo(T[] array, int arrayIndex) => _list.CopyTo(array, arrayIndex);
+		public IEnumerator<T> GetEnumerator() => _list.GetEnumerator();
+		public int IndexOf(T item) => _list.IndexOf(item);
+		public void Insert(int index, T item) => _list.Insert(index, item);
+		public bool Remove(T item) => _list.Remove(item);
+		public void RemoveAt(int index) => _list.RemoveAt(index);
+		IEnumerator IEnumerable.GetEnumerator() => _list.GetEnumerator();
+	}
+}