node/test/parallel/test-stream-duplex-readable...

32 lines
603 B
JavaScript

'use strict';
// https://github.com/nodejs/node/issues/35926
const common = require('../common');
const assert = require('assert');
const stream = require('stream');
let loops = 5;
const src = new stream.Readable({
highWaterMark: 16 * 1024,
read() {
if (loops--)
this.push(Buffer.alloc(20000));
}
});
const dst = new stream.Transform({
highWaterMark: 16 * 1024,
transform(chunk, output, fn) {
this.push(null);
fn();
}
});
src.pipe(dst);
dst.on('data', () => { });
dst.on('end', common.mustCall(() => {
assert.strictEqual(loops, 3);
assert.ok(src.isPaused());
}));