tests/Test-SqlDbBackupHistory.ps1

function Test-SqlDbBackupHistory {
    [CmdletBinding()]
    param (
        [parameter()][string] $TestName = "Test-SqlDbBackupHistory",
        [parameter()][string] $TestGroup = "configuration",
        [parameter()][string] $Description = "Validate CM SQL database backup history",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        $startTime = (Get-Date)
        [int]$DaysBack = Get-CmHealthDefaultValue -KeySet "sqlserver:SiteBackupMaxDaysOld" -DataSet $CmHealthConfig
        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat   = "PASS"
        $except = "FAIL"
        $msg    = "No issues found"
        if ($null -ne $ScriptParams.Credential) {
            $bh = Get-DbaDbBackupHistory -SqlInstance $ScriptParams.SqlInstance -Database $ScriptParams.Database -Since (Get-Date).AddDays(-$DaysBack) -SqlCredential $ScriptParams.Credential
        } else {
            $bh = Get-DbaDbBackupHistory -SqlInstance $ScriptParams.SqlInstance -Database $ScriptParams.Database -Since (Get-Date).AddDays(-$DaysBack)
        }
        if ($bh.Count -lt 1) {
            $stat = $except
            $msg = "No backups were completed in the last $DaysBack days"
        } else {
            $lbu = $bh[0]
            if ($lbu.Type -ne "Full") {
                $stat = $except
                $msg = "Last backup was not a FULL backup"
            } else {
                $msg = "Last Full backup was at $($lbu.End)"
            }
        }
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        $rt = Get-RunTime -BaseTime $startTime
        Write-Output $([pscustomobject]@{
            TestName    = $TestName
            TestGroup   = $TestGroup
            TestData    = $tempdata
            Description = $Description
            Status      = $stat
            Message     = $msg
            RunTime     = $rt
            Credential  = $(if($ScriptParams.Credential){$($ScriptParams.Credential).UserName} else { $env:USERNAME })
        })
    }
}