public void LastTest()
{
const string data = "One Two Three One Three";
var queue = data.Split().Aggregate(RealTimeDeque <string> .Empty, RealTimeDeque <string> .Snoc);
var last = RealTimeDeque <string> .Last(queue);
Assert.AreEqual("Three", last);
}
public void IncrementalLastTest()
{
const string data = "One Two Three Four Five";
var queue = data.Split().Aggregate(RealTimeDeque <string> .Empty, RealTimeDeque <string> .Snoc);
Assert.AreEqual("[3, {$}, {$}, 2, {$}, {$}]", DumpQueue(queue, false));
// After looking at the last element, the rest of the queue should be not created.
var last = RealTimeDeque <string> .Last(queue);
Assert.AreEqual("Five", last);
Assert.AreEqual("[3, {$}, {$}, 2, {Five, $}, {Five, $}]", DumpQueue(queue, false));
}
public void SnocLastInitTest()
{
const string data = "One Two Three One Three";
var queue = data.Split().Aggregate(RealTimeDeque <string> .Empty, RealTimeDeque <string> .Snoc);
var dat = data.Split().Reverse();
foreach (var expected in dat)
{
var actual = RealTimeDeque <string> .Last(queue);
Assert.AreEqual(expected, actual);
queue = RealTimeDeque <string> .Init(queue);
}
Assert.IsTrue(RealTimeDeque <string> .IsEmpty(queue));
}
public void EmptyLastTest()
{
var queue = RealTimeDeque <string> .Empty;
AssertThrows <ArgumentNullException>(() => RealTimeDeque <string> .Last(queue));
}
