public void Undo()
{
_swapped?.Undo();
_swapped = null;
}
public void SwapUndo() { const string code = @"int ione ione = 5 int itwo itwo = 2 int three int four int five"; var commands = GenerateCommands(code); var mutation = new SwapCommandMutation(new Random(), commands); mutation.Transform(); mutation.Undo(); var assertCommands = GenerateCommands(code); Assert.IsTrue(AreCollectionsEquals(commands, assertCommands)); }