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
58
59
60
61
62
63
64
65
66
67
68
69
70
|
'use strict';
const common = require('../common');
const assert = require('assert');
const Readable = require('stream').Readable;
const readable = new Readable({
read: () => {}
});
// Initialized to false.
assert.strictEqual(readable._readableState.emittedReadable, false);
readable.on('readable', common.mustCall(() => {
// emittedReadable should be true when the readable event is emitted
assert.strictEqual(readable._readableState.emittedReadable, true);
readable.read();
// emittedReadable is reset to false during read()
assert.strictEqual(readable._readableState.emittedReadable, false);
}, 4));
// When the first readable listener is just attached,
// emittedReadable should be false
assert.strictEqual(readable._readableState.emittedReadable, false);
// Each one of these should trigger a readable event.
process.nextTick(common.mustCall(() => {
readable.push('foo');
}));
process.nextTick(common.mustCall(() => {
readable.push('bar');
}));
process.nextTick(common.mustCall(() => {
readable.push('quo');
}));
process.nextTick(common.mustCall(() => {
readable.push(null);
}));
const noRead = new Readable({
read: () => {}
});
noRead.on('readable', common.mustCall(() => {
// emittedReadable should be true when the readable event is emitted
assert.strictEqual(noRead._readableState.emittedReadable, true);
noRead.read(0);
// emittedReadable is not reset during read(0)
assert.strictEqual(noRead._readableState.emittedReadable, true);
}));
noRead.push('foo');
noRead.push(null);
const flowing = new Readable({
read: () => {}
});
flowing.on('data', common.mustCall(() => {
// When in flowing mode, emittedReadable is always false.
assert.strictEqual(flowing._readableState.emittedReadable, false);
flowing.read();
assert.strictEqual(flowing._readableState.emittedReadable, false);
}, 3));
flowing.push('foooo');
flowing.push('bar');
flowing.push('quo');
process.nextTick(common.mustCall(() => {
flowing.push(null);
}));
|
