public void SerializationIntegration()
{
//Load the model
var repository = new ModelRepository();
var model = LoadRailwayModel(repository);
//Create the recorder
var recorder = new ModelChangeRecorder();
recorder.Start(model);
//Change the model
var route = new Route() { Id = 42 };
model.Routes.Add(route);
model.Routes[0].DefinedBy.RemoveAt(0);
model.Routes[0].DefinedBy[0].Elements.RemoveAt(0);
model.Semaphores[0].Signal = Signal.FAILURE;
//Parse the changes
var changes = recorder.GetModelChanges();
//Serialize the changes
var types = changes.TraverseFlat().Select(t => t.GetType()).Distinct();
var serializer = new XmiSerializer(types);
string xmi;
using (var writer = new StringWriter())
{
serializer.Serialize(changes, writer);
xmi = writer.ToString();
}
//Deserialize the XMI
ModelChangeCollection newChanges;
using (var reader = new StringReader(xmi))
{
newChanges = serializer.Deserialize(reader) as ModelChangeCollection;
}
Assert.IsNotNull(newChanges);
//Since model elements don't implement Equals() we can only test for property equality
var newRoute = ((ListInsertionComposition<IRoute>)((ChangeTransaction)newChanges.Changes[0]).SourceChange).NewElements[0];
Assert.AreEqual(route.Id, newRoute.Id);
//We have to leave out the changes with model elements in them when tesing for equality
CollectionAssert.AreEqual(changes.Changes.Skip(1).ToArray(), newChanges.Changes.Skip(1).ToArray());
//Load second instance of the model
var newRepository = new ModelRepository();
var newModel = LoadRailwayModel(newRepository);
//Apply changes to the new model
newChanges.Apply(newRepository);
Assert.AreEqual(model.Routes.Count, newModel.Routes.Count);
Assert.AreEqual(model.Routes[0].DefinedBy.Count, newModel.Routes[0].DefinedBy.Count);
Assert.AreEqual(model.Routes[0].DefinedBy[0].Elements.Count, newModel.Routes[0].DefinedBy[0].Elements.Count);
Assert.AreEqual(model.Semaphores[0].Signal, newModel.Semaphores[0].Signal);
}
private ModelChangeCollection Serialize(ModelChangeCollection before, params Type[] additionalTypes)
{
var serializer = new XmiSerializer(additionalTypes);
string xmi;
using (var writer = new StringWriter())
{
serializer.Serialize(before, writer);
xmi = writer.ToString();
}
using (var reader = new StringReader(xmi))
{
return serializer.Deserialize(reader) as ModelChangeCollection;
}
}