public void TestUndoRedo()
{
var provider = new UndoRedoProvider4Test();
var s = string.Empty;
provider.AddUndoActionExposed(string.Empty, () => s += "a", () => s += "A");
provider.AddUndoActionExposed(string.Empty, () => s += "b", () => s += "B");
provider.AddUndoActionExposed(string.Empty, () => s += "c", () => s += "C");
Assert.AreEqual(string.Empty, s);
provider.Undo();
Assert.AreEqual("c", s);
provider.Redo();
Assert.AreEqual("cC", s);
s = string.Empty;
provider.Undo();
provider.Undo();
provider.Undo();
Assert.AreEqual("cba", s);
provider.Redo();
provider.Redo();
Assert.AreEqual("cbaAB", s);
provider.Redo();
Assert.AreEqual("cbaABC", s);
}
public void TestUndoRedoDescription()
{
var provider = new UndoRedoProvider4Test();
Assert.AreEqual(string.Empty, provider.UndoDescription);
Assert.AreEqual(string.Empty, provider.RedoDescription);
provider.AddUndoActionExposed("Aaa", () => { }, () => { });
Assert.AreEqual("Aaa", provider.UndoDescription);
Assert.AreEqual(string.Empty, provider.RedoDescription);
provider.AddUndoActionExposed("Bbb", () => { }, () => { });
Assert.AreEqual("Bbb", provider.UndoDescription);
Assert.AreEqual(string.Empty, provider.RedoDescription);
provider.Undo();
Assert.AreEqual("Aaa", provider.UndoDescription);
Assert.AreEqual("Bbb", provider.RedoDescription);
provider.Undo();
Assert.AreEqual(string.Empty, provider.UndoDescription);
Assert.AreEqual("Aaa", provider.RedoDescription);
provider.Redo();
Assert.AreEqual("Aaa", provider.UndoDescription);
Assert.AreEqual("Bbb", provider.RedoDescription);
provider.Redo();
Assert.AreEqual("Bbb", provider.UndoDescription);
Assert.AreEqual(string.Empty, provider.RedoDescription);
}
public void TestStateChanged()
{
var provider = new UndoRedoProvider4Test();
var counter = 0;
provider.StateChanged += (sender, e) => counter++;
Assert.AreEqual(0, counter);
provider.AddUndoActionExposed(string.Empty, () => { }, () => { });
Assert.AreEqual(1, counter);
provider.Undo();
Assert.AreEqual(2, counter);
provider.Redo();
Assert.AreEqual(3, counter);
using (provider.BeginMultiActionsUndoRedoStep(string.Empty))
{
provider.AddUndoActionExposed(string.Empty, () => { }, () => { });
Assert.AreEqual(3, counter);
provider.AddUndoActionExposed(string.Empty, () => { }, () => { });
Assert.AreEqual(3, counter);
}
Assert.AreEqual(4, counter);
using (provider.SuppressUndoRegistration())
{
provider.AddUndoActionExposed(string.Empty, () => { }, () => { });
}
Assert.AreEqual(4, counter);
provider.ClearCache();
Assert.AreEqual(5, counter);
}
public void TestUndoRedoMultiActionsStep()
{
var provider = new UndoRedoProvider4Test();
var s = string.Empty;
using (provider.BeginMultiActionsUndoRedoStep(string.Empty))
{
provider.AddUndoActionExposed(string.Empty, () => s += "a", () => s += "A");
provider.AddUndoActionExposed(string.Empty, () => s += "b", () => s += "B");
}
using (provider.BeginMultiActionsUndoRedoStep(string.Empty))
{
provider.AddUndoActionExposed(string.Empty, () => s += "c", () => s += "C");
provider.AddUndoActionExposed(string.Empty, () => s += "d", () => s += "D");
}
Assert.AreEqual(string.Empty, s);
provider.Undo();
Assert.AreEqual("dc", s);
provider.Redo();
Assert.AreEqual("dcCD", s);
s = string.Empty;
provider.Undo();
provider.Undo();
Assert.AreEqual("dcba", s);
provider.Redo();
provider.Redo();
Assert.AreEqual("dcbaABCD", s);
}
public void TestAddUndoActionClearsRedoSteps()
{
var provider = new UndoRedoProvider4Test();
provider.AddUndoActionExposed("Aaa", () => { }, () => { });
provider.Undo();
Assert.IsTrue(provider.CanRedo);
Assert.AreEqual("Aaa", provider.RedoDescription);
provider.AddUndoActionExposed("Bbb", () => { }, () => { });
Assert.IsFalse(provider.CanRedo);
Assert.AreEqual(string.Empty, provider.RedoDescription);
}
public void TestSuppressUndoRedo()
{
var provider = new UndoRedoProvider4Test();
provider.AddUndoActionExposed("Aaa", () => { }, () => { });
Assert.AreEqual("Aaa", provider.UndoDescription);
using (provider.SuppressUndoRegistration())
{
provider.AddUndoActionExposed("Bbb", () => { }, () => { });
Assert.AreEqual("Aaa", provider.UndoDescription);
}
provider.AddUndoActionExposed("Bbb", () => { }, () => { });
Assert.AreEqual("Bbb", provider.UndoDescription);
}
public void TestUndoRedoDescriptionForMultiActionsStep()
{
var provider = new UndoRedoProvider4Test();
using (provider.BeginMultiActionsUndoRedoStep("Mmm"))
{
provider.AddUndoActionExposed("Aaa", () => { }, () => { });
Assert.AreEqual(string.Empty, provider.UndoDescription);
provider.AddUndoActionExposed("Bbb", () => { }, () => { });
Assert.AreEqual(string.Empty, provider.UndoDescription);
}
Assert.AreEqual("Mmm", provider.UndoDescription);
Assert.AreEqual(string.Empty, provider.RedoDescription);
provider.Undo();
Assert.AreEqual(string.Empty, provider.UndoDescription);
Assert.AreEqual("Mmm", provider.RedoDescription);
}
public void TestCanUndoRedo()
{
var provider = new UndoRedoProvider4Test();
Assert.IsFalse(provider.CanUndo);
Assert.IsFalse(provider.CanRedo);
provider.AddUndoActionExposed("Test", () => { }, () => { });
Assert.IsTrue(provider.CanUndo);
Assert.IsFalse(provider.CanRedo);
provider.Undo();
Assert.IsFalse(provider.CanUndo);
Assert.IsTrue(provider.CanRedo);
provider.Redo();
Assert.IsTrue(provider.CanUndo);
Assert.IsFalse(provider.CanRedo);
}
