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'use strict';
require('../common');
const assert = require('assert');
const Readable = require('_stream_readable');
const Writable = require('_stream_writable');
const util = require('util');
util.inherits(TestReadable, Readable);
function TestReadable(opt) {
if (!(this instanceof TestReadable))
return new TestReadable(opt);
Readable.call(this, opt);
this._ended = false;
}
TestReadable.prototype._read = function(n) {
if (this._ended)
this.emit('error', new Error('_read called twice'));
this._ended = true;
this.push(null);
};
util.inherits(TestWritable, Writable);
function TestWritable(opt) {
if (!(this instanceof TestWritable))
return new TestWritable(opt);
Writable.call(this, opt);
this._written = [];
}
TestWritable.prototype._write = function(chunk, encoding, cb) {
this._written.push(chunk);
cb();
};
// this one should not emit 'end' until we read() from it later.
const ender = new TestReadable();
let enderEnded = false;
// what happens when you pipe() a Readable that's already ended?
const piper = new TestReadable();
// pushes EOF null, and length=0, so this will trigger 'end'
piper.read();
setTimeout(function() {
ender.on('end', function() {
enderEnded = true;
});
assert(!enderEnded);
const c = ender.read();
assert.equal(c, null);
const w = new TestWritable();
let writableFinished = false;
w.on('finish', function() {
writableFinished = true;
});
piper.pipe(w);
process.on('exit', function() {
assert(enderEnded);
assert(writableFinished);
console.log('ok');
});
});