public void should_throw_when_dequeue_from_empty()
{
IQueue <int> queue = new Services.Queue <int>();
Action act = () => queue.Dequeue();
act.Should().Throw <InvalidOperationException>();
}
public void should_return_false_when_trydequeue_from_empty()
{
IQueue <int> queue = new Services.Queue <int>();
int result;
queue.TryDequeue(out result).Should().BeFalse();
}
public void should_return_true_when_trydequeue_after_enqueue()
{
IQueue <int> queue = new Services.Queue <int>();
queue.Enqueue(123);
int dequeued;
bool result = queue.TryDequeue(out dequeued);
result.Should().BeTrue();
dequeued.Should().Be(123);
}
public void should_allow_many_items(int itemCount)
{
IQueue <double> queue = new Services.Queue <double>();
Action act = () =>
{
for (int i = 0; i < itemCount; i++)
{
queue.Enqueue(1.0 / i);
}
};
act.Should().NotThrow();
}
public void should_still_contain_items_after_trydequeue()
{
IQueue <int> queue = new Services.Queue <int>();
queue.Enqueue(321);
int dequeueped;
queue.TryDequeue(out dequeueped);
Action act = () => queue.Dequeue();
act.Should().NotThrow();
}
public static IEnumerable <TestCaseData> GetNonEmptyTestObjects()
{
var stack = new Services.Stack <string>();
stack.Push("Bravo");
stack.Push("Alpha");
yield return(new TestCaseData(stack, "Alpha").SetName("{m}_stack"));
var queue = new Services.Queue <string>();
queue.Enqueue("Bravo");
queue.Enqueue("Alpha");
yield return(new TestCaseData(queue, "Bravo").SetName("{m}_queue"));
}
public void should_be_empty_after_dequeueing_all_items()
{
IQueue <string> queue = new Services.Queue <string>();
var items = new[] { "Alpha", "Bravo", "Charlie", "Delta" };
foreach (string s in items)
{
queue.Enqueue(s);
}
for (int i = 0; i < items.Length; i++)
{
queue.Dequeue();
}
queue.Invoking(q => q.Dequeue()).Should().Throw <InvalidOperationException>();
}
public void should_dequeue_items_correctly(int itemCount)
{
IQueue <int> queue = new Services.Queue <int>();
int[] range = Enumerable.Range(1, itemCount).ToArray();
int[] expected = range;
foreach (int i in range)
{
queue.Enqueue(i);
}
var actual = new int[range.Length];
int index = 0;
foreach (int i in range)
{
actual[index++] = queue.Dequeue();
}
actual.Should().BeEquivalentTo(expected);
}
