PS> (Get-Item $PSHOME/POWERSHELL.config.json).Name
POWERSHELL.config.json

# 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
  }
}