[SPFarm] Ensure that flights are registered in SharePoint Subscription

[Yvand]

Pull Request (PR) description

SharePoint Subscription introduced flighting. When creating a farm using PowerShell, one new step is to run cmdlet Update-SPFlightsConfigFile to ensure that all flights in current build are registered in the configuration database.

This Pull Request (PR) fixes the following issues

In SharePoint Subscription, ensure that all flights available in current build are registered in the configuration database

Task list

• Added an entry to the change log under the Unreleased section of the file CHANGELOG.md.
  Entry should say what was changed and how that affects users (if applicable), and
  reference the issue being resolved (if applicable).
• Resource documentation added/updated in README.md.
• Resource parameter descriptions added/updated in README.md, schema.mof and comment-based
  help.
• Comment-based help added/updated.
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Community Testing Guidelines.
• Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[ykuijs]

The SPSE unit test failed. I think because the Get-SPDscRegistryKey function isn't mocked and therefore doesn't return any value. This is causing the Join-Path to fail. Please create proper mocks for Get-SPDscRegistryKey, Test-Path and Update-SPFlightsConfigFile.

[ykuijs]

This last change broke the unit tests for the other versions as well 😉 Looks like something is not going well here. You can run the tests locally, by just running the tests ps1 file.

I see that you have implemented an if statement in the code. It is also possible to create multiple mock using ParameterFilters. That way you can mock the same function multiple times, once for each scenario.

[Yvand]

Indeed, it is because I should Mock Update-SPFlightsConfigFile only if current environment is SharePoint SE.

I already thought about it but I didn't know how to do it, but I also didn't know about ParameterFilters, hopefully it will allow me to fix that, I'll take a look asap

[ykuijs]

You can check the used version number like we do here:

SharePointDsc/tests/Unit/SharePointDsc/SharePointDsc.SPDistributedCacheService.Tests.ps1

Lines 427 to 428 in fdb9a4a

	if ($Global:SPDscHelper.CurrentStubBuildNumber.Major -eq 16 -and
	$Global:SPDscHelper.CurrentStubBuildNumber.Build -gt 13000)

[codecov]

Codecov Report

Merging #1428 (9d17ae8) into master (b90202b) will decrease coverage by 1%.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1428   +/-   ##
======================================
- Coverage      84%     84%   -1%     
======================================
  Files         145     145           
  Lines       22647   22657   +10     
======================================
+ Hits        19076   19084    +8     
- Misses       3571    3573    +2     

Impacted Files	Coverage Δ
...PointDsc/DSCResources/MSFT_SPFarm/MSFT_SPFarm.psm1	90% <100%> (+<1%)	⬆️

... and 1 file with indirect coverage changes

[ykuijs]

LGTM