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denoland-deno/tests/node_compat/test/parallel/test-diagnostics-channel-object-channel-pub-sub.js
Asher Gomez 29085895c9
chore: move tools/node_compat to tests/node_compat/runner (#23025)
The `tools/node_compat/node` submodule has been moved to
`tests/node_compat/runner/suite` and the remaining files within
`tools/node_compat` to `tests/node_compat/runner`.

Most of the changes are of the header within `tests/node_compat/test`
files. The `setup` and `test` tasks within `tests/node_comapt` execute
successfully.

Towards #22525
CC @mmastrac
2024-04-03 09:24:55 +11:00

53 lines
1.5 KiB
JavaScript

// 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;
const input = {
foo: 'bar'
};
// Should not have named channel
assert.ok(!dc.hasSubscribers('test'));
// Individual channel objects can be created to avoid future lookups
const channel = dc.channel('test');
assert.ok(channel instanceof Channel);
// No subscribers yet, should not publish
assert.ok(!channel.hasSubscribers);
const subscriber = common.mustCall((message, name) => {
assert.strictEqual(name, channel.name);
assert.deepStrictEqual(message, input);
});
// Now there's a subscriber, should publish
channel.subscribe(subscriber);
assert.ok(channel.hasSubscribers);
// The ActiveChannel prototype swap should not fail instanceof
assert.ok(channel instanceof Channel);
// Should trigger the subscriber once
channel.publish(input);
// Should not publish after subscriber is unsubscribed
assert.ok(channel.unsubscribe(subscriber));
assert.ok(!channel.hasSubscribers);
// unsubscribe() should return false when subscriber is not found
assert.ok(!channel.unsubscribe(subscriber));
assert.throws(() => {
channel.subscribe(null);
}, { code: 'ERR_INVALID_ARG_TYPE' });