File: test-stream-writableState-uncorked-bufferedRequestCount.js

package info (click to toggle)
nodejs 4.8.2~dfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 62,476 kB
  • ctags: 111,183
  • sloc: cpp: 661,544; ansic: 31,406; python: 23,073; makefile: 1,418; sh: 1,384; perl: 255; lisp: 222; ruby: 76; xml: 50
file content (57 lines) | stat: -rw-r--r-- 1,653 bytes parent folder | download | duplicates (2)
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
57
'use strict';

const common = require('../common');
const assert = require('assert');
const stream = require('stream');

const writable = new stream.Writable();

writable._writev = common.mustCall((chunks, cb) => {
  assert.equal(chunks.length, 2, 'two chunks to write');
  cb();
}, 1);

writable._write = common.mustCall((chunk, encoding, cb) => {
  cb();
}, 1);

// first cork
writable.cork();
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 0);

// cork again
writable.cork();
assert.strictEqual(writable._writableState.corked, 2);

// the first chunk is buffered
writable.write('first chunk');
assert.strictEqual(writable._writableState.bufferedRequestCount, 1);

// first uncork does nothing
writable.uncork();
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 1);

process.nextTick(uncork);

// the second chunk is buffered, because we uncork at the end of tick
writable.write('second chunk');
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 2);

function uncork() {
  // second uncork flushes the buffer
  writable.uncork();
  assert.strictEqual(writable._writableState.corked, 0);
  assert.strictEqual(writable._writableState.bufferedRequestCount, 0);

  // verify that end() uncorks correctly
  writable.cork();
  writable.write('third chunk');
  writable.end();

  // end causes an uncork() as well
  assert.strictEqual(writable._writableState.corked, 0);
  assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
}