/// <summary>
/// Q2. Stack implementation
/// </summary>
private static void Question2()
{
Console.WriteLine("Q2: Stack implementation");
var s = new StackContainer <string>();
Console.WriteLine($"Stack initialized. stack size: {s.Size()} stack is empty? {s.IsEmpty()}");
s.Push("item1");
Console.WriteLine($"Push \"item1\" into stack. stack size: {s.Size()} stack is empty? {s.IsEmpty()}");
s.Push("item2");
Console.WriteLine($"Push \"item2\" into stack. stack size: {s.Size()} stack is empty? {s.IsEmpty()}");
var popItem = s.Pop();
Console.WriteLine($"Pop \"{popItem}\" out of stack. stack size: {s.Size()} stack is empty? {s.IsEmpty()}");
popItem = s.Pop();
Console.WriteLine($"Pop \"{popItem}\" out of stack. stack size: {s.Size()} stack is empty? {s.IsEmpty()}");
Console.WriteLine();
}
public void IsEmptyTest_EmptyStack()
{
// Arrange
var s = new StackContainer <int>();
// Assert
Assert.IsTrue(s.IsEmpty());
Assert.AreEqual(0, s.Size());
}
public void PushTest_OneItem()
{
// Arrange
var s = new StackContainer <int>();
// Action
s.Push(10);
// Assert
Assert.AreEqual(1, s.Size());
}
public void IsEmptyTest_WithOneItem()
{
// Arrange
var s = new StackContainer <int>();
s.Push(10);
// Assert
Assert.IsFalse(s.IsEmpty());
Assert.AreEqual(1, s.Size());
}
public void PushTest_TwoStringItems()
{
// Arrange
var s = new StackContainer <string>();
// Action
s.Push("item1");
s.Push("item2");
// Assert
Assert.AreEqual(2, s.Size());
}
public void PopTest_OneItem()
{
// Arrange
var s = new StackContainer <string>();
// Action
s.Push("item1");
s.Push("item2");
var item = s.Pop();
// Assert
Assert.AreEqual(1, s.Size());
Assert.AreEqual("item2", item);
}
public void StackContainerTest()
{
// Arrange
var s = new StackContainer <int>();
// Action
s.Push(1);
s.Push(2);
var popItem1 = s.Pop();
s.Push(3);
var popItem2 = s.Pop();
var popItem3 = s.Pop();
// Assert
Assert.IsTrue(s.IsEmpty());
Assert.AreEqual(0, s.Size());
Assert.AreEqual(2, popItem1);
Assert.AreEqual(3, popItem2);
Assert.AreEqual(1, popItem3);
}