public void PushShouldAddTheItemToFirstPlace()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(firstEntry);
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(firstEntry, stack.Peek());
stack.Push(lastEntry);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
}
public void PeekShouldReturnLastAddedItemAndShouldNotRemoveItemWhenStackHasMoreThanOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
}
public void PopShouldReturnLastAddedItemAndDecrementCountWhenStackHasMoreThanOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For<IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Pop());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(firstEntry, stack.Pop());
Assert.AreEqual(0, stack.Count);
Assert.AreEqual(null, stack.Pop());
Assert.AreEqual(0, stack.Count);
}
public void PopShouldReturnLastAddedItemAndDecrementCountWhenStackHasMoreThanOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Pop());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(firstEntry, stack.Pop());
Assert.AreEqual(0, stack.Count);
Assert.AreEqual(null, stack.Pop());
Assert.AreEqual(0, stack.Count);
}
public void RemoveShouldRemoveItemFromStack()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(true, stack.Remove(lastEntry));
Assert.AreEqual(firstEntry, stack.Peek());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(true, stack.Remove(firstEntry));
Assert.AreEqual(0, stack.Count);
}
public void PeekShouldReturnTheOnlyItemAndShouldNotRemovwItemWhenStackHasOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry entry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(entry);
Assert.AreEqual(entry, stack.Peek());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(entry, stack.Peek());
Assert.AreEqual(1, stack.Count);
}
public void PopShouldReturnTheOnlyItemAndSetCountToZeroWhenStackHasOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry entry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(entry);
Assert.AreEqual(entry, stack.Pop());
Assert.AreEqual(0, stack.Count);
Assert.AreEqual(null, stack.Pop());
Assert.AreEqual(0, stack.Count);
}
public void PeekShouldReturnTheOnlyItemAndShouldNotRemovwItemWhenStackHasOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry entry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(entry);
Assert.AreEqual(entry, stack.Peek());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(entry, stack.Peek());
Assert.AreEqual(1, stack.Count);
}
public void PopShouldReturnTheOnlyItemAndSetCountToZeroWhenStackHasOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry entry = Substitute.For <IWorkItemWaiterEntry>();
stack.Push(entry);
Assert.AreEqual(entry, stack.Pop());
Assert.AreEqual(0, stack.Count);
Assert.AreEqual(null, stack.Pop());
Assert.AreEqual(0, stack.Count);
}
public void RemoveShouldReturnFalseIfTheSpecifiedItemIsNotFoundInTheStack()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For <IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For <IWorkItemWaiterEntry>();
Assert.AreEqual(false, stack.Remove(firstEntry));
stack.Push(firstEntry);
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(false, stack.Remove(lastEntry));
}
public void PeekShouldReturnLastAddedItemAndShouldNotRemoveItemWhenStackHasMoreThanOneItems()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For<IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
}
public void RemoveShouldReturnFalseIfTheSpecifiedItemIsNotFoundInTheStack()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For<IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For<IWorkItemWaiterEntry>();
Assert.AreEqual(false, stack.Remove(firstEntry));
stack.Push(firstEntry);
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(false, stack.Remove(lastEntry));
}
public void RemoveShouldRemoveItemFromStack()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For<IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(firstEntry);
stack.Push(lastEntry);
Assert.AreEqual(2, stack.Count);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(true, stack.Remove(lastEntry));
Assert.AreEqual(firstEntry, stack.Peek());
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(true, stack.Remove(firstEntry));
Assert.AreEqual(0, stack.Count);
}
public void PushShouldThrowExceptionWhenItemIsEmpty()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
Assert.Throws<ArgumentNullException>(() => stack.Push(null));
}
public void PushShouldAddTheItemToFirstPlace()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
IWorkItemWaiterEntry firstEntry = Substitute.For<IWorkItemWaiterEntry>();
IWorkItemWaiterEntry lastEntry = Substitute.For<IWorkItemWaiterEntry>();
stack.Push(firstEntry);
Assert.AreEqual(1, stack.Count);
Assert.AreEqual(firstEntry, stack.Peek());
stack.Push(lastEntry);
Assert.AreEqual(lastEntry, stack.Peek());
Assert.AreEqual(2, stack.Count);
}
public void PushShouldThrowExceptionWhenItemIsEmpty()
{
WorkItemWaiterEntryStack stack = new WorkItemWaiterEntryStack();
Assert.Throws <ArgumentNullException>(() => stack.Push(null));
}