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Get-Help keeps returning help it already loaded after Update-Help -Scope CurrentUser, which makes HelpSystem.Tests.ps1 flaky when $PSHOME has help #28274
Description
Prerequisites
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- Refer to Differences between Windows PowerShell 5.1 and PowerShell.
Steps to reproduce
With help installed in $PSHOME (e.g. after Update-Help -Scope AllUsers, or a distribution package that ships help), and an empty CurrentUser help folder:
# Help loaded before Update-Help is cached for the session:
pwsh -NoProfile -c "Get-Help Import-Module -Parameter NoClobber | Out-Null
Update-Help -Module Microsoft.PowerShell.Core -SourcePath ./test/powershell/engine/Help/assets -UICulture en-US -Force -Scope CurrentUser
(Get-Help Import-Module -Parameter NoClobber | Out-String) -match 'Aliases\s+NoOverwrite'"
False
# Without the first Get-Help, or in a new session, the new CurrentUser help is used:
True
Expected behavior
After `Update-Help`, Get-Help in the same session returns the updated help.Actual behavior
Get-Help keeps returning the help it loaded from `$PSHOME` before the update.
This makes `test/powershell/engine/Help/HelpSystem.Tests.ps1` flaky. "Validate that get-help works for CurrentUserScope" installs the test help with `Update-Help -Scope CurrentUser`, then expects `Aliases NoOverwrite` for `Import-Module -NoClobber`. When an earlier test in the same Pester session already loaded `Import-Module` help from `$PSHOME`, it gets the shipped help instead (`Aliases none`) and fails. Your CI has no help in `$PSHOME`, so it isn't affected. "help can be found for CurrentUser Scope" removes the `$PSHOME` help first, so it isn't affected either.
That test removes help from `$PSHOME` (`Remove-Item $coreHelpFilePath` and so on), so it also deletes shipped help when the tests run against an installed or packaged PowerShell.Error details
Environment data
PowerShell 7.6.9 on Arch Linux x86_64, built from source with en-US help installed in `$PSHOME`
Name Value
---- -----
PSVersion 7.6.9
PSEdition Core
GitCommitId 7.6.9
OS Arch Linux
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.4
SerializationVersion 1.1.0.1
WSManStackVersion 3.0Visuals
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