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denoland-deno/tests/node_compat/test/parallel/test-stream-readable-hwm-0.js
Yoshiya Hinosawa d04d5677d9
chore: update node_compat setup script (#27051)
This PR updates the node_compat setup script. Now the copied version in
each test file is corrected. Also `TODO.md` links to the correct files
in Node.js repo.
2024-11-25 22:35:53 +09:00

37 lines
1.1 KiB
JavaScript

// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 20.11.1
// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
'use strict';
const common = require('../common');
// This test ensures that Readable stream will call _read() for streams
// with highWaterMark === 0 upon .read(0) instead of just trying to
// emit 'readable' event.
const assert = require('assert');
const { Readable } = require('stream');
const r = new Readable({
// Must be called only once upon setting 'readable' listener
read: common.mustCall(),
highWaterMark: 0,
});
let pushedNull = false;
// This will trigger read(0) but must only be called after push(null)
// because the we haven't pushed any data
r.on('readable', common.mustCall(() => {
assert.strictEqual(r.read(), null);
assert.strictEqual(pushedNull, true);
}));
r.on('end', common.mustCall());
process.nextTick(() => {
assert.strictEqual(r.read(), null);
pushedNull = true;
r.push(null);
});