public void EmptyHeadTest()
{
var queue = BankersQueue <string> .Empty;
var ex = AssertThrows <ArgumentNullException>(() => BankersQueue <string> .Head(queue));
Assert.AreEqual("Value cannot be null.\r\n" + "Parameter name: queue", ex.Message);
}
public void HeadTest()
{
const string data = "One Two Three One Three";
var queue = data.Split().Aggregate(BankersQueue <string> .Empty, BankersQueue <string> .Snoc);
var item = BankersQueue <string> .Head(queue);
Assert.AreEqual("One", item);
}
public void PushPopTest()
{
const string data = "One Two Three One Three";
var queue = data.Split().Aggregate(BankersQueue <string> .Empty, BankersQueue <string> .Snoc);
foreach (var expected in data.Split())
{
var actual = BankersQueue <string> .Head(queue);
Assert.AreEqual(expected, actual);
queue = BankersQueue <string> .Tail(queue);
}
Assert.IsTrue(BankersQueue <string> .IsEmpty(queue));
}
public void NullHeadTest()
{
var ex = AssertThrows <NullReferenceException>(() => BankersQueue <string> .Head(null));
Assert.AreEqual("Object reference not set to an instance of an object.", ex.Message);
}