[BUG] Azure.Communication.Chat is not mockable

[cmeyertons]

Library name and version

Azure.Communication.Chat 1.3.1

Describe the bug

The Azure Communication Chat library is not mockable.

Especially for a service that I cannot emulate locally, I need to be able to mock out the interactions with it.

Expected behavior

I would expect the library to adhere to the design guidlines for testability:

https://learn.microsoft.com/en-us/dotnet/azure/sdk/unit-testing-mocking?tabs=csharp

Actual behavior

I cannot mock:

• CreateChatThreadResult
• ChatThreadProperties
• there's probably many more

Reproduction Steps

n/a

Environment

No response