How to unit test HandleEventAsync(ProcessEventArgs args) in Azure.Messaging.EventHub library

[topagarwal]

We are migrating to Azure.Messaging.EventHubs.Processor v5.6.0 library from Microsoft.Azure.EventHubs.Processor v4.1.0. I m using await messageHandler.HandleEventAsync(args); where args is of ProcessEventArgs type. Most of our business logic that I want to unit test is based on EventData which is a property of ProcessEventArgs. Event data has Readonly dictionary of systemProperties and other properties. The public constructor of EventData does not let us specify the systemProperties or any other property other than EventData body.

Both ProcessEventArgs and EventBody do not have mockable interfaces. In such case can you please advise on how can we unit test the code using ProcessEventArgs?

Versions

• OS platform and version:
• .NET Version: .Net core app 3.1
• NuGet package version : Azure.Messaging.EventHubs.Processor v5.6.0, Microsoft.NET.Test.Sdk v16.6.1