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nodejs/test/parallel/test-stream-readable-flow-recursion.js
Roman Reiss f29762f4dd test: enable linting for tests
Enable linting for the test directory. A number of changes was made so
all tests conform the current rules used by lib and src directories. The
only exception for tests is that unreachable (dead) code is allowed.

test-fs-non-number-arguments-throw had to be excluded from the changes
because of a weird issue on Windows CI.

PR-URL: https://github.com/nodejs/io.js/pull/1721
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
2015-05-19 21:21:27 +02:00

57 lines
1.3 KiB
JavaScript

'use strict';
var common = 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');
});