/// <summary>
/// Make first input of nodes then second one and queue with two stacks. called method to dequeue and catch error on empty stacks
/// added first inputs to queue, called method to make sure first node was getting returned in first in first out order through
/// flipping stacks, added second input and called all outputs in order of first in first out.
/// </summary>
static void QueueWithStacks()
{
//first set to add to que before a dequeue
Node nodeOne = new Node(1);
Node nodeTwo = new Node(2);
Node nodeThree = new Node(3);
Node nodeFour = new Node(4);
//second set to add after a dequeue
Node nodeFive = new Node(5);
Node nodeSix = new Node(6);
//make new instance of the double stack queue
QueueWithTwoStacks testStacks = new QueueWithTwoStacks();
//test to catch error on empty stacks
TestDequeue(testStacks);
//enqueue the first set of inputs
testStacks.Enqueue(nodeOne);
testStacks.Enqueue(nodeTwo);
testStacks.Enqueue(nodeThree);
testStacks.Enqueue(nodeFour);
//test to make sure first node value is output
TestDequeue(testStacks);
//add more values to input
testStacks.Enqueue(nodeFive);
testStacks.Enqueue(nodeSix);
//make sure order is correct
while (testStacks.DequeueStack.Peak() != null || testStacks.EnqueueStack.Peak() != null)
{
TestDequeue(testStacks);
}
}
/// <summary>
/// pass in stacks returns to console the value of first input in first input out
/// wrapped in try catch block so if error is thrown will catch it and return message to user.
/// </summary>
/// <param name="myQueueWithStacks"></param>
public static void TestDequeue(QueueWithTwoStacks myQueueWithStacks)
{
//make try catch to capture excetion from both stacks being empty
try
{
Console.WriteLine(myQueueWithStacks.Dequeue().Value);
Console.ReadLine();
}
catch (Exception)
{
Console.WriteLine("both stacks are empty nothing to dequeue");
Console.ReadLine();
}
}
static void Main(string[] args)
{
QueueWithTwoStacks <char> queue = new QueueWithTwoStacks <char>();
queue.Enqueue('a');
queue.Enqueue('b');
queue.Enqueue('c');
char head = queue.Dequeue();
Test(head, 'a');
head = queue.Dequeue();
Test(head, 'b');
queue.Enqueue('d');
head = queue.Dequeue();
Test(head, 'c');
queue.Enqueue('e');
head = queue.Dequeue();
Test(head, 'd');
head = queue.Dequeue();
Test(head, 'e');
try
{
head = queue.Dequeue();
Console.WriteLine("Test failed.");
}
catch (InvalidOperationException)
{
Console.WriteLine("Test passed.");
}
}