tests/Test-CmClientLowDiskSpace.ps1

function Test-CmClientLowDiskSpace {
    [CmdletBinding()]
    [OutputType()]
    param (
        [parameter()][string] $TestName = "Clients with Low Disk Space",
        [parameter()][string] $TestGroup = "operation",
        [parameter()][string] $TestCategory = "CM",
        [parameter()][string] $Description = "Clients with low disk space on C`: drive",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        $startTime = (Get-Date)
        #[int]$Setting = Get-CmHealthDefaultValue -KeySet "keygroup:keyname" -DataSet $CmHealthConfig
        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat   = "PASS" # do not change this
        $except = "WARNING" # or "FAIL"
        $msg    = "No issues found" # do not change this either
        $query = "select * from (
select cdr.Name,
cdr.DeviceOS,
cdr.ADSiteName,
cdr.LastLogonUser,
cdr.LastMPServerName,
ld.Name0 as Drive,
ROUND((ld.Size0/1024),2) as SizeGB,
ROUND((ld.FreeSpace0/1024),2) as FreeSpaceGB,
ROUND(((ld.Size0 - ld.FreeSpace0)/1024),2) as UsedGB,
ROUND(((ld.Size0 - ld.FreeSpace0) / CONVERT(decimal,ld.Size0)),2) as PctUsed
from v_CombinedDeviceResources cdr
inner join v_GS_LOGICAL_DISK ld on ld.ResourceID = cdr.MachineID
where ld.DeviceID0 = 'C:') as t1
where PctUsed > 0.8
order by Name"

        $res = Get-CmSqlQueryResult -Query $query -Params $ScriptParams
        if ($res.Count -gt 0) {
            $stat = $except
            $msg  = "$($res.Count) clients were found having more than 80% full on C drive"
            Write-Log -Message $msg
            $res | Foreach-Object {
                $tempdata.Add(
                    [pscustomobject]@{
                        Computer = $_.Name
                        OS       = $_.DeviceOS
                        ADSite   = $_.ADSiteName
                        LastUser = $_.LastLogonUser
                        LastMP   = $_.LastMPServerName
                        Drive    = $_.Drive
                        SizeMB   = $_.SizeGB
                        UsedMB   = $_.UsedGB
                        FreeMB   = $_.FreeSpaceGB
                        PctUsed  = [math]::Round(($_.PctUsed * 100),1)
                    }
                )
            }
        }
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        Set-CmhOutputData
    }
}