Add unit test for change

Tests/MSFT_xPackageResource.tests.ps1

@@ -0,0 +1,48 @@
+<# 
+.summary
+    Test suite for MSFT_xPackageResource.psm1
+#>
+[CmdletBinding()]
+param()
+
+Import-Module $PSScriptRoot\..\DSCResources\MSFT_xPackageResource\MSFT_xPackageResource.psm1
+
+$ErrorActionPreference = 'stop'
+Set-StrictMode -Version latest
+
+
+function Suite.BeforeAll {
+    # Remove any leftovers from previous test runs
+    Suite.AfterAll 
+
+}
+
+function Suite.AfterAll {
+    Remove-Module MSFT_xPackageResource
+}
+
+function Suite.BeforeEach {
+}
+
+try
+{
+    InModuleScope MSFT_xPackageResource {
+    Describe 'Get-RegistryValueIgnoreError' {
+
+        It 'Should get values from HKLM' {
+                $installValue = Get-RegistryValueIgnoreError 'LocalMachine' "SOFTWARE\Microsoft\Windows\CurrentVersion" "ProgramFilesDir" Registry64
+                $installValue | should be $env:programfiles
+        }
+        It 'Should get values from HKCU' {
+                $installValue = Get-RegistryValueIgnoreError 'CurrentUser' "Environment" "Temp" Registry64
+                $installValue | should be $env:temp
+        }
+
+    }
+    }
+}
+finally
+{
+    Suite.AfterAll
+}
+