Commit b187d55
| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
@@ -13,6 +13,7 @@ const { | |||
| 13 | 13 | ObjectGetOwnPropertyDescriptor, | |
| 14 | 14 | ObjectGetOwnPropertyDescriptors, | |
| 15 | 15 | ObjectGetPrototypeOf, | |
| 16 | + ObjectFreeze, | ||
| 16 | 17 | ObjectSetPrototypeOf, | |
| 17 | 18 | Promise, | |
| 18 | 19 | ReflectApply, | |
@@ -504,6 +505,8 @@ const lazyDOMException = hideStackFrames((message, name) => { | |||
| 504 | 505 | const kEnumerableProperty = ObjectCreate(null); | |
| 505 | 506 | kEnumerableProperty.enumerable = true; | |
| 506 | 507 | ||
| 508 | + const kEmptyObject = ObjectFreeze(ObjectCreate(null)); | ||
| 509 | + | ||
| 507 | 510 | module.exports = { | |
| 508 | 511 | assertCrypto, | |
| 509 | 512 | cachedResult, | |
@@ -544,5 +547,6 @@ module.exports = { | |||
| 544 | 547 | kIsEncodingSymbol: Symbol('kIsEncodingSymbol'), | |
| 545 | 548 | kVmBreakFirstLineSymbol: Symbol('kVmBreakFirstLineSymbol'), | |
| 546 | 549 | ||
| 550 | + kEmptyObject, | ||
| 547 | 551 | kEnumerableProperty, | |
| 548 | 552 | }; | |
| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
@@ -0,0 +1,90 @@ | |||
| 1 | + // Flags: --expose-internals | ||
| 2 | + 'use strict'; | ||
| 3 | + require('../common'); | ||
| 4 | + | ||
| 5 | + // Test helper objects from internal/util | ||
| 6 | + | ||
| 7 | + const assert = require('assert'); | ||
| 8 | + const { | ||
| 9 | + kEnumerableProperty, | ||
| 10 | + kEmptyObject, | ||
| 11 | + } = require('internal/util'); | ||
| 12 | + | ||
| 13 | + Object.prototype.blep = 'blop'; | ||
| 14 | + | ||
| 15 | + { | ||
| 16 | + assert.strictEqual( | ||
| 17 | + kEnumerableProperty.blep, | ||
| 18 | + undefined | ||
| 19 | + ); | ||
| 20 | + assert.strictEqual( | ||
| 21 | + kEnumerableProperty.enumerable, | ||
| 22 | + true | ||
| 23 | + ); | ||
| 24 | + assert.strictEqual( | ||
| 25 | + Object.getPrototypeOf(kEnumerableProperty), | ||
| 26 | + null | ||
| 27 | + ); | ||
| 28 | + assert.deepStrictEqual( | ||
| 29 | + Object.getOwnPropertyNames(kEnumerableProperty), | ||
| 30 | + [ 'enumerable' ] | ||
| 31 | + ); | ||
| 32 | + } | ||
| 33 | + | ||
| 34 | + { | ||
| 35 | + assert.strictEqual( | ||
| 36 | + kEmptyObject.blep, | ||
| 37 | + undefined | ||
| 38 | + ); | ||
| 39 | + assert.strictEqual( | ||
| 40 | + kEmptyObject.prototype, | ||
| 41 | + undefined | ||
| 42 | + ); | ||
| 43 | + assert.strictEqual( | ||
| 44 | + Object.getPrototypeOf(kEmptyObject), | ||
| 45 | + null | ||
| 46 | + ); | ||
| 47 | + assert.strictEqual( | ||
| 48 | + kEmptyObject instanceof Object, | ||
| 49 | + false | ||
| 50 | + ); | ||
| 51 | + assert.deepStrictEqual( | ||
| 52 | + Object.getOwnPropertyDescriptors(kEmptyObject), | ||
| 53 | + {} | ||
| 54 | + ); | ||
| 55 | + assert.deepStrictEqual( | ||
| 56 | + Object.getOwnPropertyNames(kEmptyObject), | ||
| 57 | + [] | ||
| 58 | + ); | ||
| 59 | + assert.deepStrictEqual( | ||
| 60 | + Object.getOwnPropertySymbols(kEmptyObject), | ||
| 61 | + [] | ||
| 62 | + ); | ||
| 63 | + assert.strictEqual( | ||
| 64 | + Object.isExtensible(kEmptyObject), | ||
| 65 | + false | ||
| 66 | + ); | ||
| 67 | + assert.strictEqual( | ||
| 68 | + Object.isSealed(kEmptyObject), | ||
| 69 | + true | ||
| 70 | + ); | ||
| 71 | + assert.strictEqual( | ||
| 72 | + Object.isFrozen(kEmptyObject), | ||
| 73 | + true | ||
| 74 | + ); | ||
| 75 | + | ||
| 76 | + assert.throws( | ||
| 77 | + () => kEmptyObject.foo = 'bar', | ||
| 78 | + TypeError | ||
| 79 | + ); | ||
| 80 | + assert.throws( | ||
| 81 | + () => Object.assign(kEmptyObject, { foo: 'bar' }), | ||
| 82 | + TypeError | ||
| 83 | + ); | ||
| 84 | + assert.throws( | ||
| 85 | + () => Object.defineProperty(kEmptyObject, 'foo', {}), | ||
| 86 | + TypeError | ||
| 87 | + ); | ||
| 88 | + } | ||
| 89 | + | ||
| 90 | + delete Object.prototype.blep; | ||
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