winutil/functions/private/Test-WinUtilPackageManager.ps1

function Test-WinUtilPackageManager {
    <#

    .SYNOPSIS
        Checks if Winget and/or Choco are installed

    .PARAMETER winget
        Check if Winget is installed

    .PARAMETER choco
        Check if Chocolatey is installed

    #>

    Param(
        [System.Management.Automation.SwitchParameter]$winget,
        [System.Management.Automation.SwitchParameter]$choco
    )

    if($winget){
        if (Test-Path ~\AppData\Local\Microsoft\WindowsApps\winget.exe) {
            return $true
        }
    }

    if($choco){
        if ((Get-Command -Name choco -ErrorAction Ignore) -and ($chocoVersion = (Get-Item "$env:ChocolateyInstall\choco.exe" -ErrorAction Ignore).VersionInfo.ProductVersion)){
            return $true
        }
    }

    return $false
}