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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');
var assert = require('assert');
var stream = require('stream');
var hwm = 10;
var r = stream.Readable({ highWaterMark: hwm });
var chunks = 10;
var t = (chunks * 5);
var data = new Buffer(chunks * hwm + Math.ceil(hwm / 2));
for (var i = 0; i < data.length; i++) {
var c = 'asdf'.charCodeAt(i % 4);
data[i] = c;
}
var pos = 0;
var pushedNull = false;
r._read = function(n) {
if (pushedNull) {
throw new Error('_read after null push!?');
}
// every third chunk is fast
push(!(chunks % 3));
function push(fast) {
var c = pos >= data.length ? null : data.slice(pos, pos + n);
console.error('push', c === null ? 'null' : c.length);
pushedNull = pushedNull || c === null;
if (fast) {
pos += n;
r.push(c);
} else {
setTimeout(function() {
pos += n;
r.push(c);
});
}
}
};
var w = stream.Writable();
var written = [];
w._write = function(chunk, encoding, cb) {
written.push(chunk.toString());
cb();
};
var ended = false;
r.on('end', function() {
ended = true;
w.end();
});
r.on('readable', function() {
var chunk;
while (null !== (chunk = r.read(10))) {
w.write(chunk);
if (chunk.length > 4)
r.unshift(new Buffer('1234'));
}
});
w.on('finish', function() {
// each chunk should start with 1234, and then be asfdasdfasdf...
// The first got pulled out before the first unshift('1234'), so it's
// lacking that piece.
assert.equal(written[0], 'asdfasdfas');
var asdf = 'd';
console.error('written[0]=%s', written[0]);
for (var i = 1; i < written.length; i++) {
console.error('written[%d]=%s', i, written[i]);
assert.equal(written[i].slice(0, 4), '1234');
for (var j = 4; j < written[i].length; j++) {
var c = written[i].charAt(j);
assert.equal(c, asdf);
switch (asdf) {
case 'a': asdf = 's'; break;
case 's': asdf = 'd'; break;
case 'd': asdf = 'f'; break;
case 'f': asdf = 'a'; break;
}
}
}
console.log('ok');
});
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