public void ModelCannotBeLinkedIfRequiredDataItemIsMissing()
{
var model = mocks.Stub <IModel>();
var modelDataItem = new ModelDataItem();
model.DataItems = new EventedList <IDataItem>();
modelDataItem.RequiredDataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
Assert.IsFalse(modelDataItem.IsLinked);
var exceptionThrown = false;
try
{
modelDataItem.LinkToModel(model);
}
catch (Exception e)
{
exceptionThrown = true;
Assert.AreEqual("Can't create link: no matching data is found in the source model for the target item with name \"Name\"", e.Message);
}
Assert.IsTrue(exceptionThrown);
Assert.IsFalse(modelDataItem.IsLinked);
}
public void UnlinkFromModel()
{
var counter = 0;
var model = mocks.Stub <IModel>();
var modelDataItem = new ModelDataItem();
model.DataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.RequiredDataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.Unlinked += delegate { counter++; };
Assert.IsFalse(modelDataItem.IsLinked);
modelDataItem.LinkToModel(model);
Assert.IsTrue(modelDataItem.IsLinked);
modelDataItem.UnlinkFromModel();
Assert.AreEqual(1, counter);
Assert.IsFalse(modelDataItem.IsLinked);
}
public void LinkToModel()
{
var linkedCounter = 0;
var unlinkedCounter = 0;
var model1 = mocks.Stub <IModel>();
var model2 = mocks.Stub <IModel>();
var modelDataItem = new ModelDataItem();
model1.DataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
model2.DataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.RequiredDataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.Linked += delegate { linkedCounter++; };
modelDataItem.Unlinked += delegate { unlinkedCounter++; };
Assert.IsFalse(modelDataItem.IsLinked);
modelDataItem.LinkToModel(model1);
Assert.AreEqual(1, linkedCounter);
Assert.AreEqual(0, unlinkedCounter);
Assert.IsTrue(modelDataItem.IsLinked);
modelDataItem.LinkToModel(model1);
// The link already exists => nothing should happen
Assert.AreEqual(1, linkedCounter);
Assert.AreEqual(0, unlinkedCounter);
Assert.IsTrue(modelDataItem.IsLinked);
modelDataItem.LinkToModel(model2);
// The previous model should be unlinked before linking again
Assert.AreEqual(2, linkedCounter);
Assert.AreEqual(1, unlinkedCounter);
Assert.IsTrue(modelDataItem.IsLinked);
}
public void ModelDataItemNameDoesNotChangeWhileLinkingAndUnlinking()
{
var model = mocks.Stub <IModel>();
var modelDataItem = new ModelDataItem {
Name = "Expected name"
};
model.DataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.RequiredDataItems = new EventedList <IDataItem> {
new DataItem(new object(), "Name", typeof(object), DataItemRole.None, "Tag")
};
modelDataItem.LinkToModel(model);
Assert.AreEqual("Expected name", modelDataItem.Name);
modelDataItem.UnlinkFromModel();
Assert.AreEqual("Expected name", modelDataItem.Name);
}