d795301025
common.js needs to be loaded in all tests so that there is checking for variable leaks and possibly other things. However, it does not need to be assigned to a variable if nothing in common.js is referred to elsewhere in the test. The main tradeoff for this bit of code churn is that it gets the code base most of the way to being able to enable the no-unused-vars rule in eslint. (The non-tooling benefit is that it lessens cognitive load when reading tests as it is an immediate indication that none of the functions or properties in common.js will be used by the test.) PR-URL: https://github.com/nodejs/node/pull/4563 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
'use strict';
|
|
require('../common');
|
|
var assert = require('assert');
|
|
|
|
// this test verifies that passing a huge number to read(size)
|
|
// will push up the highWaterMark, and cause the stream to read
|
|
// more data continuously, but without triggering a nextTick
|
|
// warning or RangeError.
|
|
|
|
var Readable = require('stream').Readable;
|
|
|
|
// throw an error if we trigger a nextTick warning.
|
|
process.throwDeprecation = true;
|
|
|
|
var stream = new Readable({ highWaterMark: 2 });
|
|
var reads = 0;
|
|
var total = 5000;
|
|
stream._read = function(size) {
|
|
reads++;
|
|
size = Math.min(size, total);
|
|
total -= size;
|
|
if (size === 0)
|
|
stream.push(null);
|
|
else
|
|
stream.push(new Buffer(size));
|
|
};
|
|
|
|
var depth = 0;
|
|
|
|
function flow(stream, size, callback) {
|
|
depth += 1;
|
|
var chunk = stream.read(size);
|
|
|
|
if (!chunk)
|
|
stream.once('readable', flow.bind(null, stream, size, callback));
|
|
else
|
|
callback(chunk);
|
|
|
|
depth -= 1;
|
|
console.log('flow(' + depth + '): exit');
|
|
}
|
|
|
|
flow(stream, 5000, function() {
|
|
console.log('complete (' + depth + ')');
|
|
});
|
|
|
|
process.on('exit', function(code) {
|
|
assert.equal(reads, 2);
|
|
// we pushed up the high water mark
|
|
assert.equal(stream._readableState.highWaterMark, 8192);
|
|
// length is 0 right now, because we pulled it all out.
|
|
assert.equal(stream._readableState.length, 0);
|
|
assert(!code);
|
|
assert.equal(depth, 0);
|
|
console.log('ok');
|
|
});
|