public void Setup()
{
_undoServiceForInt = new UndoService <int>(GetIntState, SetIntState, 3);
_individualUndoService = new UndoService <int>(GetIntState, SetIntState, 3);
_subUndoServiceForInt = new UndoService <int>(GetIntState, SetIntState, 3);
_subUndoServiceForString = new UndoService <string>(GetStringState, SetStringState, 3);
IUndoService[] subservices = { _subUndoServiceForInt, _subUndoServiceForString };
_aggregateService = new UndoServiceAggregate(subservices);
_canUndoChangedFiredCount = 0;
_canRedoChangedFiredCount = 0;
}
public void AggregateUndoServiceUndoRedoTest()
{
// UndoServiceAggregate is created using an IUndoService array:
var undoServiceForInt = new UndoService <int>(GetIntState, SetIntState, null);
var undoServiceForString = new UndoService <string>(GetStringState, SetStringState, null);
IUndoService[] subservices = { undoServiceForInt, undoServiceForString };
var serviceAggregate = new UndoServiceAggregate(subservices);
// Changes are recorded by the individual UndoServices
_statefulInt = 1;
undoServiceForInt.RecordState();
_statefulString = "One";
undoServiceForString.RecordState();
_statefulInt = 2;
undoServiceForInt.RecordState();
_statefulInt = 3;
undoServiceForInt.RecordState();
_statefulString = "Two";
undoServiceForString.RecordState();
/*
* The UndoServiceAggregate provides a unified interface for performing undo/redo on the different tracked objects.
* (You can also perform Undo/Redo on the individual services, which will undo the last change on the corresponding object.)
*/
serviceAggregate.Undo();
Assert.IsTrue(_statefulString.Equals("One"));
Assert.IsTrue(_statefulInt == 3);
serviceAggregate.Undo();
Assert.IsTrue(_statefulString.Equals("One"));
Assert.IsTrue(_statefulInt == 2);
serviceAggregate.Undo();
Assert.IsTrue(_statefulString.Equals("One"));
Assert.IsTrue(_statefulInt == 1);
serviceAggregate.Redo();
Assert.IsTrue(_statefulString.Equals("One"));
Assert.IsTrue(_statefulInt == 2);
serviceAggregate.Redo();
Assert.IsTrue(_statefulString.Equals("One"));
Assert.IsTrue(_statefulInt == 3);
serviceAggregate.Redo();
Assert.IsTrue(_statefulString.Equals("Two"));
Assert.IsTrue(_statefulInt == 3);
}
