diff --git a/test/parallel/test-vm-global-property-interceptors.js b/test/parallel/test-vm-global-property-interceptors.js new file mode 100644 index 00000000000000..e946b3fc5e463c --- /dev/null +++ b/test/parallel/test-vm-global-property-interceptors.js @@ -0,0 +1,129 @@ +'use strict'; +require('../common'); +const assert = require('assert'); +const vm = require('vm'); + +const dSymbol = Symbol('d'); +const sandbox = { + a: 'a', + dSymbol +}; + +Object.defineProperties(sandbox, { + b: { + value: 'b' + }, + c: { + value: 'c', + writable: true, + enumerable: true + }, + [dSymbol]: { + value: 'd' + }, + e: { + value: 'e', + configurable: true + }, + f: {} +}); + +const ctx = vm.createContext(sandbox); + +const result = vm.runInContext(` +const getDesc = (prop) => Object.getOwnPropertyDescriptor(this, prop); +const result = { + a: getDesc('a'), + b: getDesc('b'), + c: getDesc('c'), + d: getDesc(dSymbol), + e: getDesc('e'), + f: getDesc('f'), + g: getDesc('g') +}; +result; +`, ctx); + +//eslint-disable-next-line no-restricted-properties +assert.deepEqual(result, { + a: { value: 'a', writable: true, enumerable: true, configurable: true }, + b: { value: 'b', writable: false, enumerable: false, configurable: false }, + c: { value: 'c', writable: true, enumerable: true, configurable: false }, + d: { value: 'd', writable: false, enumerable: false, configurable: false }, + e: { value: 'e', writable: false, enumerable: false, configurable: true }, + f: { + value: undefined, + writable: false, + enumerable: false, + configurable: false + }, + g: undefined +}); + +// define new properties +vm.runInContext(` +Object.defineProperty(this, 'h', {value: 'h'}); +Object.defineProperty(this, 'i', {}); +Object.defineProperty(this, 'j', { + get() { return 'j'; } +}); +let kValue = 0; +Object.defineProperty(this, 'k', { + get() { return kValue; }, + set(value) { kValue = value } +}); +`, ctx); + +assert.deepStrictEqual(Object.getOwnPropertyDescriptor(ctx, 'h'), { + value: 'h', + writable: false, + enumerable: false, + configurable: false +}); + +assert.deepStrictEqual(Object.getOwnPropertyDescriptor(ctx, 'i'), { + value: undefined, + writable: false, + enumerable: false, + configurable: false +}); + +const jDesc = Object.getOwnPropertyDescriptor(ctx, 'j'); +assert.strictEqual(typeof jDesc.get, 'function'); +assert.strictEqual(typeof jDesc.set, 'undefined'); +assert.strictEqual(jDesc.enumerable, false); +assert.strictEqual(jDesc.configurable, false); + +const kDesc = Object.getOwnPropertyDescriptor(ctx, 'k'); +assert.strictEqual(typeof kDesc.get, 'function'); +assert.strictEqual(typeof kDesc.set, 'function'); +assert.strictEqual(kDesc.enumerable, false); +assert.strictEqual(kDesc.configurable, false); + +assert.strictEqual(ctx.k, 0); +ctx.k = 1; +assert.strictEqual(ctx.k, 1); +assert.strictEqual(vm.runInContext('k;', ctx), 1); +vm.runInContext('k = 2;', ctx); +assert.strictEqual(ctx.k, 2); +assert.strictEqual(vm.runInContext('k;', ctx), 2); + +// redefine properties on the global object +assert.strictEqual(typeof vm.runInContext('encodeURI;', ctx), 'function'); +assert.strictEqual(ctx.encodeURI, undefined); +vm.runInContext(` +Object.defineProperty(this, 'encodeURI', { value: 42 }); +`, ctx); +assert.strictEqual(vm.runInContext('encodeURI;', ctx), 42); +assert.strictEqual(ctx.encodeURI, 42); + +// redefine properties on the sandbox +vm.runInContext(` +Object.defineProperty(this, 'e', { value: 'newE' }); +`, ctx); +assert.strictEqual(ctx.e, 'newE'); + +assert.throws(() => vm.runInContext(` +'use strict'; +Object.defineProperty(this, 'f', { value: 'newF' }); +`, ctx), /TypeError: Cannot redefine property: f/);