3e1b1dd4a9
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100 lines
2 KiB
JavaScript
100 lines
2 KiB
JavaScript
// Test that having a bunch of streams piping in parallel
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// doesn't break anything.
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var common = require('../common');
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var assert = require('assert');
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var Stream = require('stream').Stream;
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var rr = [];
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var ww = [];
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var cnt = 100;
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var chunks = 1000;
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var chunkSize = 250;
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var data = new Buffer(chunkSize);
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var wclosed = 0;
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var rclosed = 0;
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function FakeStream() {
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Stream.apply(this);
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this.wait = false;
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this.writable = true;
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this.readable = true;
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}
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FakeStream.prototype = Object.create(Stream.prototype);
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FakeStream.prototype.write = function(chunk) {
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console.error(this.ID, 'write', this.wait);
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if (this.wait) {
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process.nextTick(this.emit.bind(this, 'drain'));
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}
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this.wait = !this.wait;
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return this.wait;
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};
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FakeStream.prototype.end = function() {
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this.emit('end');
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process.nextTick(this.close.bind(this));
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};
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// noop - closes happen automatically on end.
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FakeStream.prototype.close = function() {
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this.emit('close');
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};
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// expect all streams to close properly.
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process.on('exit', function() {
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assert.equal(cnt, wclosed, 'writable streams closed');
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assert.equal(cnt, rclosed, 'readable streams closed');
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});
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for (var i = 0; i < chunkSize; i++) {
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chunkSize[i] = i % 256;
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}
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for (var i = 0; i < cnt; i++) {
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var r = new FakeStream();
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r.on('close', function() {
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console.error(this.ID, 'read close');
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rclosed++;
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});
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rr.push(r);
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var w = new FakeStream();
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w.on('close', function() {
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console.error(this.ID, 'write close');
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wclosed++;
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});
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ww.push(w);
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r.ID = w.ID = i;
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r.pipe(w);
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}
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// now start passing through data
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// simulate a relatively fast async stream.
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rr.forEach(function(r) {
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var cnt = chunks;
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var paused = false;
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r.on('pause', function() {
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paused = true;
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});
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r.on('resume', function() {
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paused = false;
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step();
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});
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function step() {
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r.emit('data', data);
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if (--cnt === 0) {
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r.end();
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return;
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}
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if (paused) return;
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process.nextTick(step);
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}
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process.nextTick(step);
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});
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