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// 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.
'use strict';
require('../common');
const assert = require('assert');
const { Readable, Writable } = require('stream');
const EE = require('events').EventEmitter;
// A mock thing a bit like the net.Socket/tcp_wrap.handle interaction
const stream = new Readable({
highWaterMark: 16,
encoding: 'utf8'
});
const source = new EE();
stream._read = function() {
console.error('stream._read');
readStart();
};
let ended = false;
stream.on('end', function() {
ended = true;
});
source.on('data', function(chunk) {
const ret = stream.push(chunk);
console.error('data', stream.readableLength);
if (!ret)
readStop();
});
source.on('end', function() {
stream.push(null);
});
let reading = false;
function readStart() {
console.error('readStart');
reading = true;
}
function readStop() {
console.error('readStop');
reading = false;
process.nextTick(function() {
const r = stream.read();
if (r !== null)
writer.write(r);
});
}
const writer = new Writable({
decodeStrings: false
});
const written = [];
const expectWritten =
[ 'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg',
'asdfgasdfgasdfgasdfg' ];
writer._write = function(chunk, encoding, cb) {
console.error(`WRITE ${chunk}`);
written.push(chunk);
process.nextTick(cb);
};
writer.on('finish', finish);
// Now emit some chunks.
const chunk = 'asdfg';
let 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.deepStrictEqual(written, expectWritten);
console.log('ok');
}
function end() {
source.emit('end');
assert(!reading);
writer.end(stream.read());
setImmediate(function() {
assert(ended);
});
}
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