public void Push_Pop_Peek_All_CorrectItem()
{
var ms = new MaxStack <int>(5);
ms.Push(1);
ms.Push(2);
ms.Push(3);
Assert.AreEqual(3, ms.Peek());
Assert.AreEqual(3, ms.Pop());
Assert.AreEqual(2, ms.Peek());
Assert.AreEqual(2, ms.Pop());
Assert.AreEqual(1, ms.Peek());
Assert.AreEqual(1, ms.Pop());
}
public void Peek_WhenEmpty_returnDefault()
{
var ms1 = new MaxStack <int>(5);
Assert.AreEqual(0, ms1.Peek());
var ms2 = new MaxStack <string>(5);
Assert.IsNull(ms2.Peek());
}
public void PushMoreThenMax_ExcessIsLost()
{
var ms = new MaxStack <string>(2);
ms.Push("1");
ms.Push("2");
ms.Push("3");
Assert.AreEqual("3", ms.Pop());
Assert.AreEqual("2", ms.Pop());
Assert.IsNull(ms.Peek());
}
public void Grow_AddSpaceAtEnd()
{
var ms = new MaxStack <int>(2);
ms.Push(1);
ms.Push(2);
ms.Grow(0.5f);
Assert.AreEqual(3, ms.MaxSize);
Assert.AreEqual(2, ms.Pop());
Assert.AreEqual(1, ms.Pop());
Assert.AreEqual(0, ms.Peek());
}
public void RemoveItem_GivesCorrectSequence()
{
var ms = new MaxStack <string>(3);
ms.Push("1");
ms.Push("2");
ms.Push("3");
ms.Remove("2");
Assert.AreEqual("3", ms.Pop());
Assert.AreEqual("1", ms.Pop());
Assert.IsNull(ms.Peek());
}
public void Shrink_ExcessIsLost()
{
var ms = new MaxStack <int>(4);
ms.Push(1);
ms.Push(2);
ms.Push(3);
ms.Push(4);
ms.Shrink(0.5f);
Assert.AreEqual(2, ms.MaxSize);
Assert.AreEqual(4, ms.Pop());
Assert.AreEqual(3, ms.Pop());
Assert.AreEqual(0, ms.Peek());
}