Fix issue with DnsRecordCname resource when HostNameAlias not ends with '.' #266 (#298)

Author: ahpooch

CHANGELOG.md

@@ -56,6 +56,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Use `New-ArgumentException` instead of `New-InvalidArgumentException`.
 - DSC_DnsServerClientSubnet
   - Fixed wrong SYNAPSIS.
+- DnsRecordCname
+  - Fixed bug with dot at the end [[Issue #266](https://github.com/dsccommunity/DnsServerDsc/issues/266)].
 - DnsRecordA
   - Fixed [[Issue #281](https://github.com/dsccommunity/DnsServerDsc/issues/281)].
 - Pester tests

source/Classes/020.DnsRecordCname.ps1

@@ -59,7 +59,8 @@ class DnsRecordCname : DnsRecordBase
         }
 
         $record = Get-DnsServerResourceRecord @dnsParameters -ErrorAction SilentlyContinue | Where-Object -FilterScript {
-            $_.RecordData.HostNameAlias -eq "$($this.HostnameAlias)."
+            # Ensure that HostNameAlias we using for filtering contains precisely one dot at the end.
+            $_.RecordData.HostNameAlias -eq $($this.HostNameAlias.Trim('.') + '.')
         }
 
         return $record