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'use strict';
// Test that having a bunch of streams piping in parallel
// doesn't break anything.
require('../common');
const assert = require('assert');
const Stream = require('stream').Stream;
const rr = [];
const ww = [];
const cnt = 100;
const chunks = 1000;
const chunkSize = 250;
const data = Buffer.allocUnsafe(chunkSize);
let wclosed = 0;
let rclosed = 0;
function FakeStream() {
Stream.apply(this);
this.wait = false;
this.writable = true;
this.readable = true;
}
FakeStream.prototype = Object.create(Stream.prototype);
FakeStream.prototype.write = function(chunk) {
console.error(this.ID, 'write', this.wait);
if (this.wait) {
process.nextTick(this.emit.bind(this, 'drain'));
}
this.wait = !this.wait;
return this.wait;
};
FakeStream.prototype.end = function() {
this.emit('end');
process.nextTick(this.close.bind(this));
};
// noop - closes happen automatically on end.
FakeStream.prototype.close = function() {
this.emit('close');
};
// expect all streams to close properly.
process.on('exit', function() {
assert.strictEqual(cnt, wclosed, 'writable streams closed');
assert.strictEqual(cnt, rclosed, 'readable streams closed');
});
for (let i = 0; i < chunkSize; i++) {
data[i] = i;
}
for (let i = 0; i < cnt; i++) {
const r = new FakeStream();
r.on('close', function() {
console.error(this.ID, 'read close');
rclosed++;
});
rr.push(r);
const w = new FakeStream();
w.on('close', function() {
console.error(this.ID, 'write close');
wclosed++;
});
ww.push(w);
r.ID = w.ID = i;
r.pipe(w);
}
// now start passing through data
// simulate a relatively fast async stream.
rr.forEach(function(r) {
let cnt = chunks;
let paused = false;
r.on('pause', function() {
paused = true;
});
r.on('resume', function() {
paused = false;
step();
});
function step() {
r.emit('data', data);
if (--cnt === 0) {
r.end();
return;
}
if (paused) return;
process.nextTick(step);
}
process.nextTick(step);
});
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