ValidateScriptDemoFunction.ps1

function New-Example{
    
    [CmdletBinding()]
        Param(
        [Parameter(
            Mandatory=$true,
            Position=0)]
        [ValidateScript({ 
            
            $requiredProperties=@("Property1","Property2","Property3", "Property4")
 
            $members=Get-Member -InputObject $_ -MemberType NoteProperty
 
            $missingProperties=Compare-Object -ReferenceObject $requiredProperties -DifferenceObject $members.Name -PassThru -ErrorAction SilentlyContinue
 
            if (-not($missingProperties)){
                
                $true               
            
            }else{
                
                $missingProperties | ForEach-Object {
 
                    Throw [System.Management.Automation.ValidationMetadataException] "Property: '$_' missing"
 
                } 
            }
 
            $_.PSObject.Properties | ForEach-Object {
                
                if (([string]::IsNullOrEmpty($_.Value))){
                        
                    Throw [System.Management.Automation.ValidationMetadataException] "Property '$($_.Name)' has either a NULL or empty value"   
                }   
            }
        })]
        [Object]
        $InputObject
    )
 
    begin{}
 
    process{
        
        Write-Output "Main function"
    }
    end{}
}
 
$config=  [PSCUSTOMOBJECT]@{
 
            property1= "Value";
            property2= "Value";
            property3= "Value";
            property4= $null;
    
        }

New-Example -InputObject $config