Add test case for rule supression

Author: Kapil Borle

Tests/Engine/RuleSuppression.tests.ps1

@@ -21,6 +21,15 @@ Function do-something
 }
 '@
 
+$ruleSuppressionInConfiguration = @'
+Configuration xFileUpload
+{
+[Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingConvertToSecureStringWithPlainText", "")]
+param ([string] $decryptedPassword)
+$securePassword = ConvertTo-SecureString $decryptedPassword -AsPlainText -Force
+}
+'@
+
 Describe "RuleSuppressionWithoutScope" {
     Context "Function" {
         It "Does not raise violations" {
@@ -49,6 +58,13 @@ Describe "RuleSuppressionWithoutScope" {
         }
     }
 
+    Context "Rule suppression within DSC Configuration definition" {
+        It "Suppresses rule" {
+            $suppressedRule = Invoke-ScriptAnalyzer -ScriptDefinition $ruleSuppressionInConfiguration -SuppressedOnly
+            $suppressedRule.Count | Should Be 1
+        }
+    }
+
     if (!$testingLibraryUsage)
     {
 	Context "Bad Rule Suppression" {