blob: ba420157e72bbde29e138ac8566373b93f8039a3 (
plain)
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
|
// Flags: --no-warnings
'use strict';
// Test that warnings are emitted when a Promise experiences an uncaught
// rejection, and then again if the rejection is handled later on.
const common = require('../common');
const assert = require('assert');
common.disableCrashOnUnhandledRejection();
let b = 0;
process.on('warning', common.mustCall((warning) => {
switch (b++) {
case 0:
// String rejection error displayed
assert.strictEqual(warning.message, 'This was rejected');
break;
case 1:
// Warning about rejection not being handled (will be next tick)
assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
assert(
/Unhandled promise rejection/.test(warning.message),
'Expected warning message to contain "Unhandled promise rejection" ' +
'but did not. Had "' + warning.message + '" instead.'
);
break;
case 2:
// One time deprecation warning, first unhandled rejection
assert.strictEqual(warning.name, 'DeprecationWarning');
break;
case 3:
// Number rejection error displayed. Note it's been stringified
assert.strictEqual(warning.message, '42');
break;
case 4:
// Unhandled rejection warning (won't be handled next tick)
assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
assert(
/Unhandled promise rejection/.test(warning.message),
'Expected warning message to contain "Unhandled promise rejection" ' +
'but did not. Had "' + warning.message + '" instead.'
);
break;
case 5:
// Rejection handled asynchronously.
assert.strictEqual(warning.name, 'PromiseRejectionHandledWarning');
assert(/Promise rejection was handled asynchronously/
.test(warning.message));
}
}, 6));
const p = Promise.reject('This was rejected'); // Reject with a string
setImmediate(common.mustCall(() => p.catch(() => { })));
Promise.reject(42); // Reject with a number
|
