node/test/parallel/test-buffer-new.js

'use strict';

const common = require('../common');
const assert = require('assert');

assert.throws(() => new Buffer(42, 'utf8'), common.expectsError({
    code: 'ERR_INVALID_ARG_TYPE',
    type: TypeError,
    message: 'The "string" argument must be of type string. ' +
             'Received type number'
}));