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118 lines
2.1 KiB
118 lines
2.1 KiB
'use strict';
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var common = require('../common');
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var stream = require('stream');
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var Readable = stream.Readable;
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var Writable = stream.Writable;
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var assert = require('assert');
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var util = require('util');
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var EE = require('events').EventEmitter;
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// a mock thing a bit like the net.Socket/tcp_wrap.handle interaction
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var stream = new Readable({
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highWaterMark: 16,
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encoding: 'utf8'
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});
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var source = new EE();
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stream._read = function() {
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console.error('stream._read');
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readStart();
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};
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var ended = false;
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stream.on('end', function() {
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ended = true;
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});
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source.on('data', function(chunk) {
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var ret = stream.push(chunk);
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console.error('data', stream._readableState.length);
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if (!ret)
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readStop();
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});
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source.on('end', function() {
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stream.push(null);
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});
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var reading = false;
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function readStart() {
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console.error('readStart');
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reading = true;
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}
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function readStop() {
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console.error('readStop');
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reading = false;
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process.nextTick(function() {
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var r = stream.read();
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if (r !== null)
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writer.write(r);
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});
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}
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var writer = new Writable({
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decodeStrings: false
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});
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var written = [];
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var expectWritten =
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[ 'asdfgasdfgasdfgasdfg',
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'asdfgasdfgasdfgasdfg',
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'asdfgasdfgasdfgasdfg',
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'asdfgasdfgasdfgasdfg',
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'asdfgasdfgasdfgasdfg',
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'asdfgasdfgasdfgasdfg' ];
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writer._write = function(chunk, encoding, cb) {
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console.error('WRITE %s', chunk);
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written.push(chunk);
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process.nextTick(cb);
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};
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writer.on('finish', finish);
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// now emit some chunks.
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var chunk = 'asdfg';
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var set = 0;
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readStart();
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data();
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function data() {
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assert(reading);
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source.emit('data', chunk);
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assert(reading);
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source.emit('data', chunk);
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assert(reading);
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source.emit('data', chunk);
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assert(reading);
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source.emit('data', chunk);
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assert(!reading);
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if (set++ < 5)
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setTimeout(data, 10);
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else
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end();
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}
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function finish() {
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console.error('finish');
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assert.deepEqual(written, expectWritten);
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console.log('ok');
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}
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function end() {
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source.emit('end');
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assert(!reading);
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writer.end(stream.read());
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setTimeout(function() {
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assert(ended);
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});
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}
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