public void TestRedoClearsOnDo()
{
var hk = new HistoryKeeper <int>(0);
hk.Do(4);
hk.Do(4);
hk.GoBack();
hk.Do(5);
Assert.Throws <EmptyHistoryException>(() => hk.GoForward());
}
public void TestUndoNormal()
{
var hk = new HistoryKeeper <int>(0);
hk.Do(4);
Assert.AreEqual(0, hk.GoBack());
hk.Do(1);
hk.Do(2);
hk.Do(3);
Assert.AreEqual(2, hk.GoBack());
Assert.AreEqual(1, hk.GoBack());
Assert.AreEqual(0, hk.GoBack());
}
public void TestRedoNormal()
{
var hk = new HistoryKeeper <int>(0);
hk.Do(4);
hk.GoBack();
Assert.AreEqual(4, hk.GoForward());
hk.Do(1);
hk.Do(2);
hk.Do(3);
hk.GoBack();
hk.GoBack();
Assert.AreEqual(2, hk.GoForward());
Assert.AreEqual(3, hk.GoForward());
hk.GoBack();
Assert.AreEqual(3, hk.GoForward());
}
public void TestUndoThrowsExcpOnEmpty()
{
var hk = new HistoryKeeper <int>(0);
Assert.Throws <EmptyHistoryException>(() => hk.GoBack());
hk.Do(4);
hk.GoBack();
Assert.Throws <EmptyHistoryException>(() => hk.GoBack());
}
public void TestRedoThrowsExcpOnEmpty()
{
var hk = new HistoryKeeper <int>(0);
Assert.Throws <EmptyHistoryException>(() => hk.GoForward());
hk.Do(4);
Assert.Throws <EmptyHistoryException>(() => hk.GoForward());
hk.GoBack();
hk.GoForward();
Assert.Throws <EmptyHistoryException>(() => hk.GoForward());
hk.Do(1);
hk.Do(2);
hk.Do(3);
hk.GoBack();
hk.GoBack();
Assert.AreEqual(2, hk.GoForward());
Assert.AreEqual(3, hk.GoForward());
hk.GoBack();
Assert.AreEqual(3, hk.GoForward());
}
public override void Go(Folder folder)
{
CurrentPath = folder.Path;
History.Do(folder);
}