tests/Test-WindowsUpdates.ps1

function Test-WindowsUpdates {
    [CmdletBinding()]
    param (
        [parameter(Mandatory)][ValidateNotNullOrEmpty()][hashtable] $ScriptParams
    )
    Write-Verbose "test: missing windows updates"
    try {
        $res = Get-WindowsUpdate -ComputerName $ScriptParams.ComputerName -WindowsUpdate
        if ($res.Count -gt 0) {
            Write-Verbose "$($res.Count) updates are not installed"
            if ($ScriptParams.Remediate -eq $True) {
                $rsx = Get-WindowsUpdate -ComputerName $ScriptParams.ComputerName -WindowsUpdate -AcceptAll -Install -RecurseCycle 3 -IgnoreReboot
                $result = 'REMEDIATED'
            }
            else {
                $result = 'FAIL'
            }
        }
        else {
            $result = 'PASS'
        }
    }
    catch {
        $result = 'ERROR'
        Write-Error $_.Exception.Message
    }
    finally {
        $result
    }
}