Fixed ConstantValue null check test and rule

Author: iRon7

Rules/AvoidUsingArrayList.cs

@@ -107,7 +107,7 @@ testAst is CommandAst cmdAst &&
                 // Check for -TypeName parameter
                 if (
                     bindingResult.BoundParameters.ContainsKey("TypeName") &&
-                    bindingResult.BoundParameters["TypeName"] != null &&
+                    bindingResult.BoundParameters["TypeName"].ConstantValue != null &&
                     arrayListName.IsMatch(bindingResult.BoundParameters["TypeName"].ConstantValue as string)
                 )
                 {

Tests/Rules/AvoidUsingArrayList.tests.ps1

@@ -266,7 +266,7 @@ Describe "AvoidArrayList" {
         It "Dynamic types shouldn't error"  {
             $scriptDefinition = {
                 $type = "System.Collections.ArrayList"
-                New-Object -TypeName '$type'
+                New-Object -TypeName $type
             }.ToString()
 
             $analyzer = { Invoke-ScriptAnalyzer -ScriptDefinition $scriptDefinition -IncludeRule @($ruleName) }