Get canonical path in PowerShell

Get-cPath.ps1

function Get-cPath
{
    param
    (
        $Path
    )

    if (!([System.Io.File]::Exists($Path) -or [System.Io.Directory]::Exists($Path)))
    {
        return $Path
        
    }
    
    $Dir = [System.IO.DirectoryInfo]::new($Path)

    if ($Dir.Parent -ne $null)
    {
        Join-Path (Get-cPath -Path $Dir.Parent.FullName) ($Dir.Parent.GetFileSystemInfos($Dir.Name)[0].Name)
    }
    else
    {
        $Dir.Name.ToUpper()
    }
}

pscore.tests.ps1

Describe "PSCore" {
    # test that the module folder and module file names match case
    # this is important for cross-compatibility with Unix-like operating systems
    $FolderName = Get-Item (Get-CanonicalPath $BuildModulePath) | Select -ExpandProperty BaseName
    $ManifestFileName = Get-Item (Get-CanonicalPath $BuildManifestPath) | Select -ExpandProperty BaseName
    $ModuleFileName = Get-Item (Get-CanonicalPath $BuildPsm1Path) | Select -ExpandProperty BaseName

    It "manifest name matches folder name (case-sensitive)" {
        $FolderName | Should MatchExactly $ManifestFileName
    }

    It "module name matches folder name (case-sensitive)" {
        $FolderName | Should MatchExactly $ModuleFileName
    }
}