On Windows and macOS, Get-Item and Get-ChildItem report file names as specified, not their actual case #13190
Description
Note: The problem:
-
affects only files, not also directories
-
for file paths, affects all path components.
Simple demonstration (macOS and Windows):
PS> (Get-Item $PSHOME/POWERSHELL.config.json).Name
POWERSHELL.config.jsonNote how POWERSHELL.config.json was reported via .Name - exactly as specified - even though the actual casing of the filename is powershell.config.json
Steps to reproduce
Windows and macOS only (platforms with case-insensitive (but case-preserving) file-systems).
# Note: The problem occurs only with *files*, not directories.
# With files, the problem occurs in all path components.
Describe "Get-Item / Get-ChildItem: non-wildcard file-name case fidelity test" {
BeforeAll {
Push-Location (Get-Item testdrive:/).FullName
$nameActual = 'AB'
$nameCaseVariant = 'aB'
New-Item $nameActual # create as all-uppercase
$testCases =
@{ Cmdlet = 'Get-Item'; Parameter = 'Path'; Property = 'Name' },
@{ Cmdlet = 'Get-Item'; Parameter = 'Path'; Property = 'FullName' },
@{ Cmdlet = 'Get-Item'; Parameter = 'LiteralPath'; Property = 'Name' },
@{ Cmdlet = 'Get-Item'; Parameter = 'LiteralPath'; Property = 'FullName' },
@{ Cmdlet = 'Get-ChildItem'; Parameter = 'Path'; Property = 'Name' },
@{ Cmdlet = 'Get-ChildItem'; Parameter = 'Path'; Property = 'FullName' },
@{ Cmdlet = 'Get-ChildItem'; Parameter = 'LiteralPath'; Property = 'Name' },
@{ Cmdlet = 'Get-ChildItem'; Parameter = 'LiteralPath'; Property = 'FullName' }
}
It "<Cmdlet>: .<Property> should report '$nameActual' as the file name when literal case variant '$nameCaseVariant' is passed to <Parameter>" -Skip:$IsLinux -TestCase $testCases {
param($Cmdlet, $Parameter, $Property)
$htArgs = @{ $Parameter = $nameCaseVariant }
Split-Path -Leaf (& $Cmdlet @htArgs).$Property | Should -BeExactly $nameActual
}
AfterAll {
Pop-Location
}
}Expected behavior
The tests should succeed.
Actual behavior
All tests fail.
Environment data
PowerShell Core 7.1.0-preview.5