fix(ext/node): better support for `node:diagnostics_channel` module (#24088)

Closes https://github.com/denoland/deno/issues/24060

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/node_compat/test/parallel/test-diagnostics-channel-tracing-channel-sync.js b/tests/node_compat/test/parallel/test-diagnostics-channel-tracing-channel-sync.js
new file mode 100644
index 000000000..036bcce3b
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-diagnostics-channel-tracing-channel-sync.js
@@ -0,0 +1,53 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
+
+'use strict';
+
+const common = require('../common');
+const dc = require('diagnostics_channel');
+const assert = require('assert');
+
+const channel = dc.tracingChannel('test');
+
+const expectedResult = { foo: 'bar' };
+const input = { foo: 'bar' };
+const thisArg = { baz: 'buz' };
+const arg = { baz: 'buz' };
+
+function check(found) {
+  assert.strictEqual(found, input);
+}
+
+const handlers = {
+  start: common.mustCall(check),
+  end: common.mustCall((found) => {
+    check(found);
+    assert.strictEqual(found.result, expectedResult);
+  }),
+  asyncStart: common.mustNotCall(),
+  asyncEnd: common.mustNotCall(),
+  error: common.mustNotCall()
+};
+
+assert.strictEqual(channel.start.hasSubscribers, false);
+channel.subscribe(handlers);
+assert.strictEqual(channel.start.hasSubscribers, true);
+const result1 = channel.traceSync(function(arg1) {
+  assert.strictEqual(arg1, arg);
+  assert.strictEqual(this, thisArg);
+  return expectedResult;
+}, input, thisArg, arg);
+assert.strictEqual(result1, expectedResult);
+
+channel.unsubscribe(handlers);
+assert.strictEqual(channel.start.hasSubscribers, false);
+const result2 = channel.traceSync(function(arg1) {
+  assert.strictEqual(arg1, arg);
+  assert.strictEqual(this, thisArg);
+  return expectedResult;
+}, input, thisArg, arg);
+assert.strictEqual(result2, expectedResult);