Test napi_run_script cannot see locals

test/napi/napi-app/main.js

@@ -14,6 +14,8 @@ if (typeof fn !== "function") {
 
 // pass GC runner as first argument
 try {
+  // napi.test.ts:147 tries to read this variable and shouldn't be able to
+  let shouldNotExist = 5;
   const result = fn.apply(null, [
     () => {
       if (process.isBun) {

test/napi/napi.test.ts

@@ -142,6 +142,10 @@ describe("napi", () => {
     it("propagates exceptions", () => {
       checkSameOutput("eval_wrapper", ["(()=>{ throw new TypeError('oops'); })()"]);
     });
+    it("cannot see locals from around its invocation", () => {
+      // variable is declared on main.js:18, but it should not be in scope for the eval'd code
+      checkSameOutput("eval_wrapper", ["shouldNotExist"]);
+    });
   });
 });