Test-EventSource tests a list of machine for a list of eventsources

Test-EventSource.ps1

function Test-EventSource {
    <#
    .SYNOPSIS
        Tests for event sources against a list of computers
    
    .DESCRIPTION
        The function uses the [System.Diagnostics.EventLog] object to test the presence of
        each event source on each computer 
    
    .PARAMETER EventSource
        The list of EventSources to check
    
    .PARAMETER ComputerName
        The list of ComputerNames to check the EventSources against
    
    .EXAMPLE
        PS C:\> Test-EventSource -EventSource 'This is a test',scecli
        Name           ComputerName Exists
        ----           ------------ ------
        This is a test SYSTEM01      False
        scecli         SYSTEM01      False
    
    .EXAMPLE
        Test-EventSource -EventSource edgeupdate,scecli -ComputerName Server01,Server02 

        Name       ComputerName  Exists
        ----       ------------  ------
        edgeupdate Server01      True
        scecli     Server01      True
        edgeupdate Server02      False
        scecli     Server02      True
    .NOTES
        This function only detects the explicit sources in the registry keys for the eventlogs.
        The sources are the registry keys underneath each specific log in the registry key
        HKLM\SYSTEM\CurrentControlSet\Services\EventLog\<logname>
        Event sources that do not exist under a specific log may return an invalid false.
        See the gist for Test-EventSourceByLog that can test an individual log.
            Thanks to santisq for the base code that it was derived from.
    #>
    [cmdletbinding()]
    param(
        [parameter(Mandatory,ValueFromPipelineByPropertyName,ValueFromPipeline)]
        [string[]]$EventSource,

        [parameter(ValueFromPipelineByPropertyName)]
        [string[]]$ComputerName = $env:COMPUTERNAME
    )

    foreach ($Computer in $ComputerName) {
        foreach ($Source in $EventSource) {
            $SourceExists = try {
                [System.Diagnostics.EventLog]::SourceExists($Source, $Computer)
            }
            catch {
                $false
            }
            [PSCustomObject]@{
                Name            = $Source
                ComputerName    = $Computer
                Exists          = $SourceExists
            }
        }
    }
}