31 lines
713 B
JavaScript
31 lines
713 B
JavaScript
// Flags: --frozen-intrinsics
|
|
'use strict';
|
|
require('../common');
|
|
const assert = require('assert');
|
|
|
|
assert.throws(
|
|
() => Object.defineProperty = 'asdf',
|
|
TypeError
|
|
);
|
|
|
|
// Ensure we can extend Console
|
|
{
|
|
class ExtendedConsole extends console.Console {}
|
|
|
|
const s = new ExtendedConsole(process.stdout);
|
|
const logs = [];
|
|
s.log = (msg) => logs.push(msg);
|
|
s.log('custom');
|
|
s.log = undefined;
|
|
assert.strictEqual(s.log, undefined);
|
|
assert.strictEqual(logs.length, 1);
|
|
assert.strictEqual(logs[0], 'custom');
|
|
}
|
|
|
|
// Ensure we can write override Object prototype properties on instances
|
|
{
|
|
const o = {};
|
|
o.toString = () => 'Custom toString';
|
|
assert.strictEqual(o + 'asdf', 'Custom toStringasdf');
|
|
}
|