public void Push_1_Is1()
{
var reversibles = new ReversibleStack();
var value = new Value();
reversibles.Push(new Add1(value));
Assert.AreEqual(1, value.Number);
}
public void PushUndo_Is0()
{
var reversibles = new ReversibleStack();
var value = new Value();
reversibles.Push(new Add1(value));
reversibles.Undo();
Assert.AreEqual(0, value.Number);
}
public void Push_3WithMaxCountOf2_Is1()
{
var reversibles = new ReversibleStack(2);
var value = new Value();
reversibles.Push(new Add1(value));
reversibles.Push(new Add1(value));
reversibles.Push(new Add1(value));
reversibles.Undo();
reversibles.Undo();
reversibles.Undo();
Assert.AreEqual(1, value.Number);
}
public void Push_InMiddleOfStack_RemovesLaterReversibles()
{
var reversibles = new ReversibleStack();
var value = new Value();
reversibles.Push(new Add1(value));
reversibles.Push(new Add1(value));
reversibles.Push(new Add1(value));
reversibles.Undo();
reversibles.Undo();
reversibles.Push(new Add1(value));
reversibles.Redo();
reversibles.Redo();
Assert.AreEqual(2, value.Number);
}
public void Redo_AtZeroReversibles_DoesNothing()
{
var reversibles = new ReversibleStack();
reversibles.Redo();
}
