Verify an event was raised by mocked object
- by joblot
In my unit test how can I verify that an event is raised by the mocked object.
I have a View(UI) -- ViewModel -- DataProvider -- ServiceProxy. ServiceProxy makes async call to serivce operation. When async operation is complete a method on DataProvider is called (callback method is passed as a method parameter). The callback method then raise and event which ViewModel is listening to.
For ViewModel test I mock DataProvider and verify that handler exists for event raised by DataProvider. When testing DataProvider I mock ServiceProxy, but how can I test that callback method is called and event is raised.
I am using RhinoMock 3.5 and AAA syntax
Thanks
-- DataProvider --
public partial class DataProvider
{
public event EventHandler<EntityEventArgs<ProductDefinition>> GetProductDefinitionCompleted;
public void GetProductDefinition()
{
var service = IoC.Resolve<IServiceProxy>();
service.GetProductDefinitionAsync(GetProductDefinitionAsyncCallback);
}
private void GetProductDefinitionAsyncCallback(ProductDefinition productDefinition, ServiceError error)
{
OnGetProductDefinitionCompleted(this, new EntityEventArgs<ProductDefinition>(productDefinition, error));
}
protected void OnGetProductDefinitionCompleted(object sender, EntityEventArgs<ProductDefinition> e)
{
if (GetProductDefinitionCompleted != null)
GetProductDefinitionCompleted(sender, e);
}
}
-- ServiceProxy --
public class ServiceProxy : ClientBase<IService>, IServiceProxy
{
public void GetProductDefinitionAsync(Action<ProductDefinition, ServiceError> callback)
{
Channel.BeginGetProductDefinition(EndGetProductDefinition, callback);
}
private void EndGetProductDefinition(IAsyncResult result)
{
Action<ProductDefinition, ServiceError> callback =
result.AsyncState as Action<ProductDefinition, ServiceError>;
ServiceError error;
ProductDefinition results = Channel.EndGetProductDefinition(out error, result);
if (callback != null)
callback(results, error);
}
}
