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'use strict';
require('../common');
var assert = require('assert');
// This test verifies that stream.unshift(Buffer(0)) or
// stream.unshift('') does not set state.reading=false.
var Readable = require('stream').Readable;
var r = new Readable();
var nChunks = 10;
var chunk = new Buffer(10);
chunk.fill('x');
r._read = function(n) {
setTimeout(function() {
r.push(--nChunks === 0 ? null : chunk);
});
};
var readAll = false;
var seen = [];
r.on('readable', function() {
var chunk;
while (chunk = r.read()) {
seen.push(chunk.toString());
// simulate only reading a certain amount of the data,
// and then putting the rest of the chunk back into the
// stream, like a parser might do. We just fill it with
// 'y' so that it's easy to see which bits were touched,
// and which were not.
var putBack = new Buffer(readAll ? 0 : 5);
putBack.fill('y');
readAll = !readAll;
r.unshift(putBack);
}
});
var expect =
[ 'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy',
'xxxxxxxxxx',
'yyyyy' ];
r.on('end', function() {
assert.deepEqual(seen, expect);
console.log('ok');
});
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