Add Testing to FeedbackProvider Tutorial

[JustinGrote]

Type of issue

Other (describe below)

Feedback

CC @sdwheeler @StevenBucher98

Ref: PowerShell/PowerShell#20722

Summary Process:

1. Register the Feedback Provider
2. Create a PowerShell Runspace and mock the commands you want to test (or don't)
3. Invoke the command in the runspace
4. Use FeedbackHub.GetFeedback() to get the results
5. Filter to the ones generated by the provider
6. Assert the correct item was produced

C# Example (Should be discouraged in favor of pester):
https://github.com/JustinGrote/MgAqDetect/blob/main/Test/FeedbackProvider.tests.cs

Pester Example:
https://github.com/JustinGrote/MgAqDetect/blob/main/Test/FeedbackProvider.tests.ps1

Page URL

https://learn.microsoft.com/en-us/powershell/scripting/dev-cross-plat/create-feedback-provider?view=powershell-7.3

Content source URL

https://github.com/MicrosoftDocs/PowerShell-Docs/blob/main/reference/docs-conceptual/dev-cross-plat/create-feedback-provider.md

Author

sdwheeler

Document Id

7ec77067-f2c9-46c7-040d-ad51eeb60caa

[sdwheeler]

@JustinGrote I think this should be a standalone article that links to/from the existing tutorial. Could you write a draft?