public void Redo_RedoOperationAvailable_InvokesRedoOperation()
{
var target = new UndoManager();
var invokableMock = new Mock <ITarget>(MockBehavior.Strict);
invokableMock.Setup(i => i.UndoOperation())
.Callback(() => target.RegisterInvokation(invokableMock.Object, i => i.RedoOperation()));
invokableMock.Setup(i => i.RedoOperation());
target.RegisterInvokation(invokableMock.Object, i => i.UndoOperation());
target.Undo();
target.Redo();
invokableMock.Verify(i => i.UndoOperation(), Times.Once());
invokableMock.Verify(i => i.RedoOperation(), Times.Once());
Assert.False(target.CanUndo);
Assert.False(target.CanRedo);
}
public void Redo_NoRedoInvocationsRegistered_ThrowsException()
{
var target = new UndoManager();
Assert.Throws <InvalidOperationException>(() => target.Redo());
}