fix(node): wrong worker_threads.terminate() return value (#23803)

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Fixes #23801

---------

Signed-off-by: Marvin Hagemeister <marvinhagemeister50@gmail.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

ext/node/polyfills/worker_threads.ts

@@ -32,6 +32,7 @@ import process from "node:process";
 const { JSONParse, JSONStringify, ObjectPrototypeIsPrototypeOf } = primordials;
 const {
   Error,
+  PromiseResolve,
   Symbol,
   SymbolFor,
   SymbolIterator,
@@ -280,7 +281,8 @@ class NodeWorker extends EventEmitter {
       this.#status = "TERMINATED";
       op_host_terminate_worker(this.#id);
     }
-    this.emit("exit", 1);
+    this.emit("exit", 0);
+    return PromiseResolve(0);
   }
 
   ref() {

tests/unit_node/worker_threads_test.ts

@@ -516,6 +516,32 @@ Deno.test({
   },
 });
 
+Deno.test({
+  name: "[node/worker_threads] Returns terminate promise with exit code",
+  async fn() {
+    const deferred = Promise.withResolvers<void>();
+    const worker = new workerThreads.Worker(
+      `
+      import { parentPort } from "node:worker_threads";
+      parentPort.postMessage("ok");
+      `,
+      {
+        eval: true,
+      },
+    );
+
+    worker.on("message", (data) => {
+      assertEquals(data, "ok");
+      deferred.resolve();
+    });
+
+    await deferred.promise;
+    const promise = worker.terminate();
+    assertEquals(typeof promise.then, "function");
+    assertEquals(await promise, 0);
+  },
+});
+
 Deno.test({
   name:
     "[node/worker_threads] MessagePort.on all message listeners are invoked",