public void TestOnDeletionStarted()
{
//Arrange
//This will subscribe our local method to the DeletionStarted event
CurrentDynamoModel.DeletionStarted += CurrentDynamoModel_DeletionStarted;
List <ModelBase> modelsToDelete = new List <ModelBase>();
Guid groupid = Guid.NewGuid();
CurrentDynamoModel.CurrentWorkspace.AddAnnotation("This is a test group", groupid);
var annotations = CurrentDynamoModel.Workspaces.SelectMany(ws => ws.Annotations);
foreach (var annotation in annotations)
{
modelsToDelete.Insert(0, annotation);
}
//Act
var cancelEventArgs = new System.ComponentModel.CancelEventArgs();
CurrentDynamoModel.OnDeletionStarted(modelsToDelete, cancelEventArgs);
//Inside the OnDeletionStarted there is a condition checking the Cancel state, then we need to set the value to true
cancelEventArgs.Cancel = true;
CurrentDynamoModel.OnDeletionStarted(modelsToDelete, cancelEventArgs);
//Assert
//This will validate that the local handler was executed and set the flag in true
CurrentDynamoModel.DeletionStarted -= CurrentDynamoModel_DeletionStarted;
Assert.IsTrue(deletionStarted);
}