public void StackMin_ShouldRemoveMinValues_AfterPoppingThemOut()
{
stack.Push(3);
stack.Push(2);
stack.Push(1);
Assert.AreEqual(1, stack.Min());
stack.Pop();
Assert.AreEqual(2, stack.Min());
stack.Pop();
Assert.AreEqual(3, stack.Min());
}
public void Pop_An_Element_In_A_Stack_With_No_Element()
{
var stack = new StackMin();
var item = stack.Pop();
Assert.Equal(0, item);
Assert.Equal(0, stack.Length);
Assert.Null(stack.Top);
Assert.Null(stack.Bottom);
Assert.Equal(int.MaxValue, stack.Min());
}
public void Pop_Two_Elements_In_A_Stack_With_Three_Elements()
{
var stack = new StackMin();
stack.Push(30);
stack.Push(20);
stack.Push(10);
Assert.Equal(10, stack.Min());
var item1 = stack.Pop();
Assert.Equal(20, stack.Min());
var item2 = stack.Pop();
Assert.Equal(10, item1);
Assert.Equal(20, item2);
Assert.Equal(1, stack.Length);
Assert.Equal(30, stack.Top.Value);
Assert.Equal(30, stack.Bottom.Value);
Assert.Equal(30, stack.Min());
}