[BotBuilder] TestFlow class does not match C# counterpart

Versions

What package version of the SDK are you using. botbuilder@^4.8.0 What nodejs version are you using v12.16.1 What browser version are you using What os are you using Windows 10 Pro

Describe the bug

The JavaScript implementation of TestFlow does not offer the same capabilities of its C# implementation.

Attempting to implement some functionalities based on the C# implementation of TestFlow is not possible to use the JavaScript version, especially those that rely on the BotCallbackhandler since its missing from JavaScript.

To Reproduce

1. Clone BotBuilder-DotNet.
2. Navigate to /libraries/Microsoft.Bot.Builder/Adapters/
3. Open TestFlow.cs
4. Clone BotBuilder-JS.
5. Navigate to /libraries/botbuilder-core/src/
6. Open testAdapter.ts, scroll down to line 537.
7. Compare both implementations of TestFlow

Expected behavior

I expect TestFlow in JavaScript to use the same implementation as in C#.

Screenshots

TestFlow C# vs TestFlow JavaScript

Additional context

While migrating bot-solution from the botframework-solutions repository tests, we found that C# uses the callback’s context to set the userProfileState, however, that is not possible to do it with the current implementation of TestFlow in JavaScript.

At the moment we rely on using TestAdapter, but neither uses the BotCallbackHandler.

[bug]

[stevkan]

@VictorGrycuk, thank you for bringing this to our attention. We’ll begin bringing the two SDKs into parity. Please feel free to check back here for updates as work progresses.

[stevkan]

@stevengum, PR is near to being submitted for review. Working on writing tests and running, then will submit.