PSPossibleIncorrectComparisonWithNull not checked inside DSC Configurations

Steps to reproduce

if (@() -eq $null) { 'true' } else { 'false' }
if (@() -ne $null) { 'true' } else { 'false' }

Configuration Test
{
    if (@() -eq $null) { 'true' } else { 'false' }
    if (@() -ne $null) { 'true' } else { 'false' }
}

Expected behavior

All 4 comparisons produce Warnings

Actual behavior

# Only the first two comparisons produce Warnings

RuleName                              Severity ScriptName Line Message
--------                              -------- ---------- ---- -------
PSPossibleIncorrectComparisonWithNull Warning  test.ps1   1    $null should be on the left side of equality comparisons.
PSPossibleIncorrectComparisonWithNull Warning  test.ps1   2    $null should be on the left side of equality comparisons.

If an unexpected error was thrown then please report the full error details using e.g. $error[0] | Select-Object *

Environment data

> $PSVersionTable
Name                           Value
----                           -----
PSVersion                      5.1.18362.1171
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.18362.1171
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

> (Get-Module -ListAvailable PSScriptAnalyzer).Version | ForEach-Object { $_.ToString() }
1.20.0

Comece reproduzindo o exemplo com PSScriptAnalyzer 1.20.0 e compare o comportamento da regra para as duas comparações de nível superior com as duas comparações dentro da DSC Configuration. Está concluído quando PSPossibleIncorrectComparisonWithNull emitir um aviso para as quatro comparações, incluindo as que estão dentro da configuração.