Current File : //proc/self/root/usr/src/node-v0.10.4/test/simple/test-stream2-push.js
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var common = require('../common.js');
var stream = require('stream');
var Readable = stream.Readable;
var Writable = stream.Writable;
var assert = require('assert');
var util = require('util');
var EE = require('events').EventEmitter;
// a mock thing a bit like the net.Socket/tcp_wrap.handle interaction
var stream = new Readable({
highWaterMark: 16,
encoding: 'utf8'
});
var source = new EE;
stream._read = function() {
console.error('stream._read');
readStart();
};
var ended = false;
stream.on('end', function() {
ended = true;
});
source.on('data', function(chunk) {
var ret = stream.push(chunk);
console.error('data', stream._readableState.length);
if (!ret)
readStop();
});
source.on('end', function() {
stream.push(null);
});
var reading = false;
function readStart() {
console.error('readStart');
reading = true;
}
function readStop() {
console.error('readStop');
reading = false;
process.nextTick(function() {
var r = stream.read();
if (r !== null)
writer.write(r);
});
}
var writer = new Writable({
decodeStrings: false
});
var written = [];
var expectWritten =
[ 'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg' ];
writer._write = function(chunk, encoding, cb) {
console.error('WRITE %s', chunk);
written.push(chunk);
process.nextTick(cb);
};
writer.on('finish', finish);
// now emit some chunks.
var chunk = "asdfg";
var set = 0;
readStart();
data();
function data() {
assert(reading);
source.emit('data', chunk);
assert(reading);
source.emit('data', chunk);
assert(reading);
source.emit('data', chunk);
assert(reading);
source.emit('data', chunk);
assert(!reading);
if (set++ < 5)
setTimeout(data, 10);
else
end();
}
function finish() {
console.error('finish');
assert.deepEqual(written, expectWritten);
console.log('ok');
}
function end() {
source.emit('end');
assert(!reading);
writer.end(stream.read());
setTimeout(function() {
assert(ended);
});
}
Mini Shell