public void Add_FirstDisk_AddsOneDiskToTower()
{
var tower = new Tower();
tower.AddDisk("A");
tower.Count.ShouldEqual(1);
tower.TopDisk().ShouldEqual("A");
}
public void Add_SmallerSecondDisk_AddsOneMoreDiskToTower()
{
var tower = new Tower();
tower.AddDisk("B");
tower.AddDisk("A");
tower.Count.ShouldEqual(2);
tower.TopDisk().ShouldEqual("A");
}
public void Add_LargerSecondDisk_ThrowsException()
{
var tower = new Tower();
tower.AddDisk("A");
try
{
tower.AddDisk("B");
}
catch (InvalidOperationException ex)
{
}
tower.Count.ShouldEqual(1);
tower.TopDisk().ShouldEqual("A");
}