public void Prepend_Successful()
{
var item = new { Id = 1, Value = "string1" };
var originalList = new List <object>
{
new { Id = 2, Value = "string2" },
null,
new { Id = 3, Value = "string3" },
};
var result = EnumerableExtension.Prepend(originalList, item).ToList();
Assert.AreEqual(originalList.Count + 1, result.Count);
AssertExtension.AreObjectsValuesEqual(item, result[0]);
for (int i = 0; i < originalList.Count; i++)
{
AssertExtension.AreObjectsValuesEqual(originalList[i], result[i + 1]);
}
}
/// <inheritdoc />
public IEnumerable <TValue> Traverse()
{
var traversedChildren = Children.SelectMany(n => n.Traverse());
return(EnumerableExtension.Prepend(traversedChildren, Item));
}