public void EnqueOneAfterEmptying()
{
const int first = 1;
const int second = 2;
var queue = new QueueWithTwoStacks();
queue.Enqueue(first);
queue.Dequeue();
queue.Enqueue(second);
var result = queue.Dequeue();
Assert.IsNotNull(result);
Assert.AreEqual(second, result);
}
public void DequeWhenEmpty()
{
var queue = new QueueWithTwoStacks();
var result = queue.Dequeue();
Assert.IsNull(result);
}
public void EnqueMultiple()
{
const int first = 1;
const int second = 2;
var queue = new QueueWithTwoStacks();
queue.Enqueue(first);
queue.Enqueue(second);
var resultFirst = queue.Dequeue();
Assert.IsNotNull(resultFirst);
Assert.AreEqual(first, resultFirst);
var resultSecond = queue.Dequeue();
Assert.IsNotNull(resultSecond);
Assert.AreEqual(second, resultSecond);
}
public void EnqueMultipleAfterEmptying()
{
const int first = 1;
const int second = 2;
const int third = 3;
var queue = new QueueWithTwoStacks();
queue.Enqueue(first);
queue.Dequeue();
queue.Enqueue(second);
queue.Enqueue(third);
var resultSecond = queue.Dequeue();
Assert.IsNotNull(resultSecond);
Assert.AreEqual(second, resultSecond);
var resultThird = queue.Dequeue();
Assert.IsNotNull(resultThird);
Assert.AreEqual(third, resultThird);
}
public void EnqueOneWhenEmpty()
{
const int value = 1;
var queue = new QueueWithTwoStacks();
queue.Enqueue(value);
var result = queue.Dequeue();
Assert.IsNotNull(result);
Assert.AreEqual(value, result);
}