Fix a bug where AvoidPositionalParameter is raised based on number of total arguments rather than positional arguments

Author: Quoc Truong

Engine/Helper.cs

@@ -353,7 +353,8 @@ public bool PositionalParameterUsed(CommandAst cmdAst, bool moreThanThreePositio
                 arguments += 1;
             }
 
-            if (moreThanThreePositional && arguments < 3)
+            // if we are only checking for 3 or more positional parameters, check that arguments < parameters + 3
+            if (moreThanThreePositional && (arguments - parameters) < 3)
             {
                 return false;
             }

Tests/Rules/AvoidPositionalParametersNoViolations.ps1

@@ -20,4 +20,6 @@ Get-Content Test
 Get-ChildItem Tests
 Write-Output "I don't want to use positional parameters"
 Split-Path "RandomPath" -Leaf
-Get-Process | ForEach-Object {Write-Host $_.name -foregroundcolor cyan}
+Get-Process | ForEach-Object {Write-Host $_.name -foregroundcolor cyan}
+
+$srvc = Get-WmiObject Win32_Service -ComputerName $computername -Filter "name=""$service""" -Credential $credential