chore(cli): Migrate some unit tests to "Promise.withResolvers()" (#21128)

Migrate to use `Promise.withResolvers()` instead of `deferred` in some
of the tests in `cli/tests/unit/`.
Issue: #21041 

1 files changed, 4 insertions, 5 deletions

diff --git a/cli/tests/unit/message_channel_test.ts b/cli/tests/unit/message_channel_test.ts
index 35b7c47c4..8872fc68b 100644
--- a/cli/tests/unit/message_channel_test.ts
+++ b/cli/tests/unit/message_channel_test.ts
@@ -5,7 +5,6 @@ import {
   assert,
   assertEquals,
 } from "../../../test_util/std/testing/asserts.ts";
-import { deferred } from "../../../test_util/std/async/deferred.ts";
 
 Deno.test("messagechannel", async () => {
   const mc = new MessageChannel();
@@ -13,14 +12,14 @@ Deno.test("messagechannel", async () => {
   assert(mc.port1);
   assert(mc.port2);
 
-  const promise = deferred();
+  const { promise, resolve } = Promise.withResolvers<void>();
 
   mc.port2.onmessage = (e) => {
     assertEquals(e.data, "hello");
     assertEquals(e.ports.length, 1);
     assert(e.ports[0] instanceof MessagePort);
     e.ports[0].close();
-    promise.resolve();
+    resolve();
   };
 
   mc.port1.postMessage("hello", [mc2.port1]);
@@ -38,7 +37,7 @@ Deno.test("messagechannel clone port", async () => {
   assert(mc.port1);
   assert(mc.port2);
 
-  const promise = deferred();
+  const { promise, resolve } = Promise.withResolvers<void>();
 
   mc.port2.onmessage = (e) => {
     const { port } = e.data;
@@ -46,7 +45,7 @@ Deno.test("messagechannel clone port", async () => {
     assert(e.ports[0] instanceof MessagePort);
     assertEquals(e.ports[0], port);
     e.ports[0].close();
-    promise.resolve();
+    resolve();
   };
 
   mc.port1.postMessage({ port: mc2.port1 }, [mc2.port1]);