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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.
var common = require('../common.js');
var R = require('_stream_readable');
var assert = require('assert');
var util = require('util');
var EE = require('events').EventEmitter;
function TestReader(n) {
R.apply(this);
this._buffer = new Buffer(n || 100);
this._buffer.fill('x');
this._pos = 0;
this._bufs = 10;
}
util.inherits(TestReader, R);
TestReader.prototype.read = function(n) {
var max = this._buffer.length - this._pos;
n = n || max;
n = Math.max(n, 0);
var toRead = Math.min(n, max);
if (toRead === 0) {
// simulate the read buffer filling up with some more bytes some time
// in the future.
setTimeout(function() {
this._pos = 0;
this._bufs -= 1;
if (this._bufs <= 0) {
// read them all!
if (!this.ended) {
this.emit('end');
this.ended = true;
}
} else {
this.emit('readable');
}
}.bind(this), 10);
return null;
}
var ret = this._buffer.slice(this._pos, this._pos + toRead);
this._pos += toRead;
return ret;
};
/////
function TestWriter() {
EE.apply(this);
this.received = [];
this.flush = false;
}
util.inherits(TestWriter, EE);
TestWriter.prototype.write = function(c) {
this.received.push(c.toString());
this.emit('write', c);
return true;
// flip back and forth between immediate acceptance and not.
this.flush = !this.flush;
if (!this.flush) setTimeout(this.emit.bind(this, 'drain'), 10);
return this.flush;
};
TestWriter.prototype.end = function(c) {
if (c) this.write(c);
this.emit('end', this.received);
};
////////
// tiny node-tap lookalike.
var tests = [];
function test(name, fn) {
tests.push([name, fn]);
}
function run() {
var next = tests.shift();
if (!next)
return console.error('ok');
var name = next[0];
var fn = next[1];
console.log('# %s', name);
fn({
same: assert.deepEqual,
equal: assert.equal,
end: run
});
}
process.nextTick(run);
test('a most basic test', function(t) {
var r = new TestReader(20);
var reads = [];
var expect = [ 'x',
'xx',
'xxx',
'xxxx',
'xxxxx',
'xxxxx',
'xxxxxxxx',
'xxxxxxxxx',
'xxx',
'xxxxxxxxxxxx',
'xxxxxxxx',
'xxxxxxxxxxxxxxx',
'xxxxx',
'xxxxxxxxxxxxxxxxxx',
'xx',
'xxxxxxxxxxxxxxxxxxxx',
'xxxxxxxxxxxxxxxxxxxx',
'xxxxxxxxxxxxxxxxxxxx',
'xxxxxxxxxxxxxxxxxxxx',
'xxxxxxxxxxxxxxxxxxxx' ];
r.on('end', function() {
t.same(reads, expect);
t.end();
});
var readSize = 1;
function flow() {
var res;
while (null !== (res = r.read(readSize++))) {
reads.push(res.toString());
}
r.once('readable', flow);
}
flow();
});
test('pipe', function(t) {
var r = new TestReader(5);
var expect = [ 'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx' ]
var w = new TestWriter;
var flush = true;
w.on('end', function(received) {
t.same(received, expect);
t.end();
});
r.pipe(w);
});
[1,2,3,4,5,6,7,8,9].forEach(function(SPLIT) {
test('unpipe', function(t) {
var r = new TestReader(5);
// unpipe after 3 writes, then write to another stream instead.
var expect = [ 'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx' ];
expect = [ expect.slice(0, SPLIT), expect.slice(SPLIT) ];
var w = [ new TestWriter(), new TestWriter() ];
var writes = SPLIT;
w[0].on('write', function() {
if (--writes === 0) {
r.unpipe();
t.equal(r._readableState.pipes, null);
w[0].end();
r.pipe(w[1]);
t.equal(r._readableState.pipes, w[1]);
}
});
var ended = 0;
var ended0 = false;
var ended1 = false;
w[0].on('end', function(results) {
t.equal(ended0, false);
ended0 = true;
ended++;
t.same(results, expect[0]);
});
w[1].on('end', function(results) {
t.equal(ended1, false);
ended1 = true;
ended++;
t.equal(ended, 2);
t.same(results, expect[1]);
t.end();
});
r.pipe(w[0]);
});
});
// both writers should get the same exact data.
test('multipipe', function(t) {
var r = new TestReader(5);
var w = [ new TestWriter, new TestWriter ];
var expect = [ 'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx' ];
var c = 2;
w[0].on('end', function(received) {
t.same(received, expect, 'first');
if (--c === 0) t.end();
});
w[1].on('end', function(received) {
t.same(received, expect, 'second');
if (--c === 0) t.end();
});
r.pipe(w[0]);
r.pipe(w[1]);
});
[1,2,3,4,5,6,7,8,9].forEach(function(SPLIT) {
test('multi-unpipe', function(t) {
var r = new TestReader(5);
// unpipe after 3 writes, then write to another stream instead.
var expect = [ 'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx',
'xxxxx' ];
expect = [ expect.slice(0, SPLIT), expect.slice(SPLIT) ];
var w = [ new TestWriter(), new TestWriter(), new TestWriter() ];
var writes = SPLIT;
w[0].on('write', function() {
if (--writes === 0) {
r.unpipe();
w[0].end();
r.pipe(w[1]);
}
});
var ended = 0;
w[0].on('end', function(results) {
ended++;
t.same(results, expect[0]);
});
w[1].on('end', function(results) {
ended++;
t.equal(ended, 2);
t.same(results, expect[1]);
t.end();
});
r.pipe(w[0]);
r.pipe(w[2]);
});
});