How to validate PowerShell Function Parameters allowing empty arrays?

Question

I have a problem similar to THIS ONE

I'm passing to a function 3 arrays and I validate object type this way

function _TEST {
[CmdletBinding()]
param (
    [parameter(mandatory=$true)]
    [array]$Path,
    [parameter(mandatory=$true)]
    [array]$RW,
    [parameter(mandatory=$true)]
    [array]$RO
)
process {
    # my code
}

It works unless I pass to function array without elements, in that case it returns this error _TEST : Cannot bind argument to parameter 'Path' because it is an empty collection.

Is there a way to solve the problem similar to [AllowEmptyString()] in linked question or do I have to write custom code to test input variable?

Answer 1

Try this:

param (
    [parameter(mandatory=$true)]
    [AllowEmptyCollection()]
    [array]$Path
)

Link:

Parameter Validation Attributes