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3b10f7f933
This is a semver-major change that resolves DEP0018. All users that have set an unhandledRejection hook or set a non-default value for the --unhandled-rejections flag will see no change in behavior after this change. Refs: https://nodejs.org/dist/latest/docs/api/deprecations.html#deprecations_dep0018_unhandled_promise_rejections PR-URL: https://github.com/nodejs/node/pull/33021 Fixes: https://github.com/nodejs/node/issues/20392 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Mary Marchini <oss@mmarchini.me> Reviewed-By: Shelley Vohr <codebytere@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Anatoli Papirovski <apapirovski@mac.com> Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
// Flags: --no-warnings --unhandled-rejections=warn
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'use strict';
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// Test that warnings are emitted when a Promise experiences an uncaught
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// rejection, and then again if the rejection is handled later on.
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const common = require('../common');
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const assert = require('assert');
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let b = 0;
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process.on('warning', common.mustCall((warning) => {
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switch (b++) {
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case 0:
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// String rejection error displayed
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assert.strictEqual(warning.message, 'This was rejected');
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break;
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case 1:
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// Warning about rejection not being handled (will be next tick)
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assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
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assert(
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/Unhandled promise rejection/.test(warning.message),
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'Expected warning message to contain "Unhandled promise rejection" ' +
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`but did not. Had "${warning.message}" instead.`
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);
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break;
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case 2:
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// Number rejection error displayed. Note it's been stringified
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assert.strictEqual(warning.message, '42');
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break;
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case 3:
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// Unhandled rejection warning (won't be handled next tick)
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assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
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assert(
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/Unhandled promise rejection/.test(warning.message),
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'Expected warning message to contain "Unhandled promise rejection" ' +
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`but did not. Had "${warning.message}" instead.`
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);
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break;
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case 4:
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// Rejection handled asynchronously.
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assert.strictEqual(warning.name, 'PromiseRejectionHandledWarning');
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assert(/Promise rejection was handled asynchronously/
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.test(warning.message));
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}
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}, 5));
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const p = Promise.reject('This was rejected'); // Reject with a string
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setImmediate(common.mustCall(() => p.catch(() => { })));
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Promise.reject(42); // Reject with a number
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