test/parallel/test-vm-context-property-forwarding.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
require('../common');
const assert = require('assert');
const vm = require('vm');

const sandbox = { x: 3 };

const ctx = vm.createContext(sandbox);

assert.strictEqual(vm.runInContext('x;', ctx), 3);
vm.runInContext('y = 4;', ctx);
assert.strictEqual(sandbox.y, 4);
assert.strictEqual(ctx.y, 4);

// Test `IndexedPropertyGetterCallback` and `IndexedPropertyDeleterCallback`
const x = { get 1() { return 5; } };
const pd_expected = Object.getOwnPropertyDescriptor(x, 1);
const ctx2 = vm.createContext(x);
const pd_actual = Object.getOwnPropertyDescriptor(ctx2, 1);

assert.deepStrictEqual(pd_actual, pd_expected);
assert.strictEqual(ctx2[1], 5);
delete ctx2[1];
assert.strictEqual(ctx2[1], undefined);