'use strict'; require('../common'); const assert = require('assert'); const vm = require('vm'); var sandbox = { x: 3 }; var 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);