public void WhenMailboxOverflows_CurrentMessagesRemainInMailbox()
{
object overflowMessage = null;
var mailbox = new NonBlockingBoundedMailbox(1, (msg) => overflowMessage = msg, TimeSpan.FromSeconds(1));
mailbox.Push("first message");
mailbox.Push("second message");
Assert.Equal("first message", mailbox.Pop());
}
public void WhenMailboxOverflows_OverflowActionCalledWithMessage()
{
object overflowMessage = null;
var mailbox = new NonBlockingBoundedMailbox(1, (msg) => overflowMessage = msg, TimeSpan.FromSeconds(1));
mailbox.Push("first message");
Assert.Null(overflowMessage);
var secondMessage = "second message";
mailbox.Push(secondMessage);
Assert.Equal(overflowMessage, secondMessage);
}
public void WhenMailboxOverflows_OverflowActionCalledOnAllSubsequentMessages()
{
int overflowActionCallCount = 0;
var mailbox = new NonBlockingBoundedMailbox(1, (msg) => overflowActionCallCount++, TimeSpan.FromSeconds(1));
mailbox.Push("first message"); // does not call overflow
for (int i = 0; i < 10; i++)
{
mailbox.Push(i);
}
Assert.Equal(overflowActionCallCount, 10);
}