1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
'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');
});
|
