public void User_CanPeekItemWhichWillBeDeletedFirst()
{
QueueModel <int> queue = null;
var peekItem = 0;
"Given there is an initialized queue with 3 items: 1000, 500, -100"
.x(() =>
{
queue = new QueueModel <int>();
queue.Initialize();
// items
queue.Enqueue(1000);
queue.Enqueue(500);
queue.Enqueue(-100);
});
"When user requests peek operation"
.x(() =>
{
peekItem = queue.PeekHeadItem();
});
"Then received peek item should be equal to 1000"
.x(() =>
{
peekItem.Should().Be(1000);
});
"And last peek status should be 'Ok'"
.x(() =>
{
var status = queue.LastPeekStatus();
status.Should().Be(OperationStatus.Ok);
});
}
public void When_UserMakeFewOperationsQueueItemsMustBeReceived()
{
QueueModel <int> queue = null;
"Given there is an initialized queue with 5 items: 1, 2, 3, 4, 5"
.x(() =>
{
queue = new QueueModel <int>();
queue.Initialize();
// items
queue.Enqueue(1);
queue.Enqueue(2);
queue.Enqueue(3);
queue.Enqueue(4);
queue.Enqueue(5);
});
"When user produce two deque operations"
.x(() =>
{
queue.Dequeue();
queue.Dequeue();
});
"Then queue should contain only 3 4 5 items"
.x(() =>
{
var items = queue.GetItems();
items.Should().BeEquivalentTo(new List <int>()
{
3, 4, 5
});
});
}
public void User_CanNotPeekItemFromEmptyQueue()
{
QueueModel <string> queue = null;
"Given there is an initialized queue with 0 items"
.x(() =>
{
queue = new QueueModel <string>();
queue.Initialize();
});
"When user requests peek operation"
.x(() =>
{
queue.PeekHeadItem();
});
"Then last peek status should be 'Error'"
.x(() =>
{
var status = queue.LastPeekStatus();
status.Should().Be(OperationStatus.Error);
});
}
public void User_CanDequeueFromNotEmptyQueue()
{
QueueModel <string> queue = null;
"Given there is an initialized queue with 3 items"
.x(() =>
{
queue = new QueueModel <string>();
queue.Initialize();
// items
queue.Enqueue("Item new");
queue.Enqueue("Item new two");
queue.Enqueue("Item new three");
});
"When user requests dequeue operation"
.x(() =>
{
queue.Dequeue();
});
"Then count of such queue should be 2"
.x(() =>
{
var count = queue.Size();
count.Should().Be(2);
});
"And last dequeue status should be 'Ok'"
.x(() =>
{
var status = queue.LastDequeueStatus();
status.Should().Be(OperationStatus.Ok);
});
}
public void User_CanAddItemToInitializedQueue()
{
QueueModel <string> queue = null;
"Given there is an initialized queue with 3 items"
.x(() =>
{
queue = new QueueModel <string>();
queue.Initialize();
// items
queue.Enqueue("Item new");
queue.Enqueue("Item new two");
queue.Enqueue("Item new three");
});
"When user adds new item to queue"
.x(() =>
{
queue.Enqueue("Add item again");
});
"Then count of such queue should be 4"
.x(() =>
{
var count = queue.Size();
count.Should().Be(4);
});
"And last enqueue status should be 'Ok'"
.x(() =>
{
var status = queue.LastEnqueueStatus();
status.Should().Be(OperationStatus.Ok);
});
}