mirror of https://gitee.com/openkylin/nodejs.git
57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
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// Flags: --no-warnings
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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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common.disableCrashOnUnhandledRejection();
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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 "${warning.message}" instead.`
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);
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break;
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case 2:
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// One time deprecation warning, first unhandled rejection
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assert.strictEqual(warning.name, 'DeprecationWarning');
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break;
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case 3:
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// Number rejection error displayed. Note it's been stringified
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assert.strictEqual(warning.message, '42');
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break;
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case 4:
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// Unhandled rejection warning (won't be handled next tick)
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assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
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assert(
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/Unhandled promise rejection/.test(warning.message),
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'Expected warning message to contain "Unhandled promise rejection" ' +
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`but did not. Had "${warning.message}" instead.`
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);
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break;
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case 5:
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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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}, 6));
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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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