public void AddMessage_InternallyCallsEnqueue()
{
/* Arrange */
var pq = new Mock<IPriorityQueue<DateTime, IMessage>>();
var pmq = new PriorityMessageQueue(pq.Object);
var stubMessage = new Mock<IMessage>();
/* Act */
pmq.AddMessage(stubMessage.Object);
/* Assert */
pq.Verify(x => x.Enqueue(It.IsAny<DateTime>(), stubMessage.Object), Times.Once());
}
public void AddNullMessage_ArgumentNullException()
{
var pq = new Mock<IPriorityQueue<DateTime, IMessage>>();
var pmq = new PriorityMessageQueue(pq.Object);
try
{
pmq.AddMessage(null);
Assert.IsTrue(false, "Adding null message should throw an argument null exception.");
}
catch (ArgumentNullException)
{
}
}
public void AddMessage_WithFutureExpiration_IsNotPendingMessage()
{
/* Arrange */
var pq = new Mock<IPriorityQueue<DateTime, IMessage>>();
var pmq = new PriorityMessageQueue(pq.Object);
var stubMessage = new Mock<IMessage>();
// Setub the message to return a datetime in the future
stubMessage.Setup(x => x.TimeToDeliver()).Returns(DateTime.Now.AddDays(10));
/* Act */
pmq.AddMessage(stubMessage.Object);
/* Assert */
Assert.AreEqual(0, pmq.PendingMessageCount);
}
public void AddMessage_WithExpirationNow_IsPendingMessage()
{
/* Arrange */
var pq = new Mock<IPriorityQueue<DateTime, IMessage>>();
var pmq = new PriorityMessageQueue(pq.Object);
var stubMessage = new Mock<IMessage>();
// Setub the message to return a datetime in the future
stubMessage.Setup(x => x.TimeToDeliver()).Returns(DateTime.Now);
// first call to Dequeue() returns stubMessage, second call returns a default IMessage
pq.Setup(x => x.Dequeue())
.Returns(stubMessage.Object)
.Callback( () => pq.Setup(y => y.Dequeue())
.Returns(default(IMessage)));
/* Act */
pmq.AddMessage(stubMessage.Object);
/* Assert */
Assert.AreEqual(1, pmq.PendingMessageCount);
}
