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c#unit-testingazuremockingazure-functions
MrTKer
MrTKer

Reputation: 19

Test Brokered Message

Now i'm working at writing unit test on azure service bus trigger function It's highly needed to mock somehow BrokeredMessage object that pass around into function. Function declaration is given below:

public static void Run(
            [ServiceBusTrigger("saas01.queue.dbmigration", AccessRights.Manage, Connection = "connection")]BrokeredMessage message)

Unfortunately, i can't find any applicable way to mock it. It hardly mocking du to this class is sealed and i can't event create wrapper around it. Do you have some ideas about it? Thanks for helping

,

Upvotes: 0

Views: 1965

Answers (1)

Marie Hoeger
Marie Hoeger

Reputation: 1331

One solution is to create a wrapper around BrokeredMessage you can test, as is done here. Here's also a MSDN post to the ServiceBus team that talks about using a wrapper too.

Note that Azure Functions V2 uses the Message class, which is public and not sealed.

    [FunctionName("ServiceBusFunc")]
    public static void Run([ServiceBusTrigger("myqueue", AccessRights.Manage, Connection = "ServiceBus")]BrokeredMessage myQueueItem, TraceWriter log)
    {
        var message = new MyBrokeredMessage(myQueueItem);
        BusinessLogic(message, log);
    }

    public static void BusinessLogic(MyBrokeredMessage myMessage, TraceWriter log)
    {
        var stream = myMessage.GetBody<Stream>();
        var reader = new StreamReader(stream);
        log.Info($"C# ServiceBus queue trigger function processed message: '{reader.ReadToEnd() }'");
    }

    public class MyBrokeredMessage
    {
        private BrokeredMessage _msg;

        public MyBrokeredMessage(BrokeredMessage msg) => _msg = msg;

        public T GetBody<T>()
        {
            return _msg.GetBody<T>();
        }
    }

Upvotes: 2

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