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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.strictEqual(warning.message, 'A Warning');
if (warning.code) assert.strictEqual(warning.code, 'CODE001');
}, 8));
process.emitWarning('A Warning');
process.emitWarning('A Warning', 'CustomWarning');
process.emitWarning('A Warning', CustomWarning);
process.emitWarning('A Warning', 'CustomWarning', CustomWarning);
process.emitWarning('A Warning', 'CustomWarning', 'CODE001');
function CustomWarning() {
Error.call(this);
this.name = 'CustomWarning';
this.message = 'A Warning';
this.code = 'CODE001';
Error.captureStackTrace(this, CustomWarning);
}
util.inherits(CustomWarning, Error);
process.emitWarning(new CustomWarning());
const warningNoToString = new CustomWarning();
warningNoToString.toString = null;
process.emitWarning(warningNoToString);
const warningThrowToString = new CustomWarning();
warningThrowToString.toString = function() {
throw new Error('invalid toString');
};
process.emitWarning(warningThrowToString);
// TypeError is thrown on invalid input
assert.throws(() => process.emitWarning(1), TypeError);
assert.throws(() => process.emitWarning({}), TypeError);
assert.throws(() => process.emitWarning(true), TypeError);
assert.throws(() => process.emitWarning([]), TypeError);
assert.throws(() => process.emitWarning('', {}), TypeError);
assert.throws(() => process.emitWarning('', '', {}), TypeError);
assert.throws(() => process.emitWarning('', 1), TypeError);
assert.throws(() => process.emitWarning('', '', 1), TypeError);
assert.throws(() => process.emitWarning('', true), TypeError);
assert.throws(() => process.emitWarning('', '', true), TypeError);
assert.throws(() => process.emitWarning('', []), TypeError);
assert.throws(() => process.emitWarning('', '', []), TypeError);