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// Flags: --no-warnings
// The flag suppresses stderr output but the warning event will still emit
'use strict';
const common = require('../common');
const assert = require('assert');
const util = require('util');
process.on('warning', common.mustCall((warning) => {
assert(warning);
assert(/^(Warning|CustomWarning)/.test(warning.name));
assert(warning.message, 'A Warning');
}, 3));
process.emitWarning('A Warning');
process.emitWarning('A Warning', 'CustomWarning');
function CustomWarning() {
Error.call(this);
this.name = 'CustomWarning';
this.message = 'A Warning';
Error.captureStackTrace(this, CustomWarning);
}
util.inherits(CustomWarning, Error);
process.emitWarning(new CustomWarning());
// TypeError is thrown on invalid output
assert.throws(() => process.emitWarning(1), TypeError);
assert.throws(() => process.emitWarning({}), TypeError);
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