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29 lines
884 B

// 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');
var b = 0;
process.on('warning', common.mustCall((warning) => {
switch (b++) {
case 0:
assert.strictEqual(warning.name, 'UnhandledPromiseRejectionWarning');
assert(/Unhandled promise rejection/.test(warning.message));
break;
case 1:
assert.strictEqual(warning.name, 'DeprecationWarning');
break;
case 2:
assert.strictEqual(warning.name, 'PromiseRejectionHandledWarning');
assert(/Promise rejection was handled asynchronously/
.test(warning.message));
}
}, 3));
const p = Promise.reject('This was rejected');
setImmediate(common.mustCall(() => p.catch(() => {})));