public void EnqueueItem()
{
// Arrange
var queue = new ObservableQueue <string>();
var itemOne = "One";
var itemTwo = "Two";
var itemThree = "Three";
// Act
queue.Enqueue(itemOne);
queue.Enqueue(itemTwo);
queue.Enqueue(itemThree);
// Assert
var firstItem = queue.FirstOrDefault();
Assert.AreEqual(itemThree, firstItem, "The queue was not in the correct order. The first item int he list should have been the last item added.");
}