test(ext/node): add timers_tests.ts from std/node (#18472)

cli/tests/unit_node/timers_test.ts

@@ -0,0 +1,52 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { assert } from "../../../test_util/std/testing/asserts.ts";
+import * as timers from "node:timers";
+import * as timersPromises from "node:timers/promises";
+
+Deno.test("[node/timers setTimeout]", () => {
+  {
+    const { clearTimeout, setTimeout } = timers;
+    const id = setTimeout(() => {});
+    clearTimeout(id);
+  }
+
+  {
+    const id = timers.setTimeout(() => {});
+    timers.clearTimeout(id);
+  }
+});
+
+Deno.test("[node/timers setInterval]", () => {
+  {
+    const { clearInterval, setInterval } = timers;
+    const id = setInterval(() => {});
+    clearInterval(id);
+  }
+
+  {
+    const id = timers.setInterval(() => {});
+    timers.clearInterval(id);
+  }
+});
+
+Deno.test("[node/timers setImmediate]", () => {
+  {
+    const { clearImmediate, setImmediate } = timers;
+    const id = setImmediate(() => {});
+    clearImmediate(id);
+  }
+
+  {
+    const id = timers.setImmediate(() => {});
+    timers.clearImmediate(id);
+  }
+});
+
+Deno.test("[node/timers/promises setTimeout]", () => {
+  const { setTimeout } = timersPromises;
+  const p = setTimeout(0);
+
+  assert(p instanceof Promise);
+  return p;
+});