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denoland-deno/cli/tests/node_compat/test/parallel/test-stream-pipe-needDrain.js
2023-06-02 15:05:32 +09:00

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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 `tools/node_compat/setup.ts`. Do not modify this file manually.
'use strict';
const common = require('../common');
const assert = require('assert');
const { Readable, Writable } = require('stream');
// Pipe should pause temporarily if writable needs drain.
{
const w = new Writable({
write(buf, encoding, callback) {
process.nextTick(callback);
},
highWaterMark: 1
});
while (w.write('asd'));
assert.strictEqual(w.writableNeedDrain, true);
const r = new Readable({
read() {
this.push('asd');
this.push(null);
}
});
r.on('pause', common.mustCall(2));
r.on('end', common.mustCall());
r.pipe(w);
}