Add test for variable duplicated in parameter and use

Author: bryannielsen

rules-tests/DowngradePhp74/Rector/ArrowFunction/ArrowFunctionToAnonymousFunctionRector/Fixture/no_params_duplicated_in_use.php.inc

@@ -0,0 +1,89 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp74\Rector\ArrowFunction\ArrowFunctionToAnonymousFunctionRector\Fixture;
+
+class NoParamsDuplicatedInUse
+{
+    public function single()
+    {
+        $callable = fn($param) => $param;
+    }
+
+    public function singleArrayAssignment()
+    {
+        $callable = fn($param) => $arr[] = $param;
+    }
+
+    public function multiple()
+    {
+        $callable = fn($param, $param2) => $param + $param2;
+    }
+
+    public function multipleArrayAssignment()
+    {
+        $callable = fn($param, $param2) => $arr[] = $param + $param2;
+    }
+
+    public function mixed()
+    {
+        $callable = fn($param) => $param + $param2;
+    }
+
+    public function mixedArrayAssignment()
+    {
+        $callable = fn($param) => $arr[] = $param + $param2;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp74\Rector\ArrowFunction\ArrowFunctionToAnonymousFunctionRector\Fixture;
+
+class NoParamsDuplicatedInUse
+{
+    public function single()
+    {
+        $callable = function ($param) {
+            return $param;
+        };
+    }
+
+    public function singleArrayAssignment()
+    {
+        $callable = function ($param) use ($arr) {
+            return $arr[] = $param;
+        };
+    }
+
+    public function multiple()
+    {
+        $callable = function ($param, $param2) {
+            return $param + $param2;
+        };
+    }
+
+    public function multipleArrayAssignment()
+    {
+        $callable = function ($param, $param2) use ($arr) {
+            return $arr[] = $param + $param2;
+        };
+    }
+
+    public function mixed()
+    {
+        $callable = function ($param) use ($param2) {
+            return $param + $param2;
+        };
+    }
+
+    public function mixedArrayAssignment()
+    {
+        $callable = function ($param) use ($arr, $param2) {
+            return $arr[] = $param + $param2;
+        };
+    }
+}
+
+?>