public void InsertItemsAtInvalidIndex()
{
var list = new ListHistory <string>
{
"a",
"b",
"c",
"d",
"e",
"f",
};
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(-1, "aa"));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(list.Count + 1, "bb"));
}
