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denoland-deno/tests/node_compat/test/parallel/test-stream-readable-add-chunk-during-data.js

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// 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');
const assert = require('assert');
const { Readable } = require('stream');
// Verify that .push() and .unshift() can be called from 'data' listeners.
for (const method of ['push', 'unshift']) {
const r = new Readable({ read() {} });
r.once('data', common.mustCall((chunk) => {
assert.strictEqual(r.readableLength, 0);
r[method](chunk);
assert.strictEqual(r.readableLength, chunk.length);
r.on('data', common.mustCall((chunk) => {
assert.strictEqual(chunk.toString(), 'Hello, world');
}));
}));
r.push('Hello, world');
}