proxyTrapsHelper.js

function allowProxyTraps(overrides) {
  function throwTest262Error(msg) {
    return function () { throw new Test262Error(msg); };
  }
  if (!overrides) { overrides = {}; }
  return {
    getPrototypeOf: overrides.getPrototypeOf || throwTest262Error('[[GetPrototypeOf]] trap called'),
    setPrototypeOf: overrides.setPrototypeOf || throwTest262Error('[[SetPrototypeOf]] trap called'),
    isExtensible: overrides.isExtensible || throwTest262Error('[[IsExtensible]] trap called'),
    preventExtensions: overrides.preventExtensions || throwTest262Error('[[PreventExtensions]] trap called'),
    getOwnPropertyDescriptor: overrides.getOwnPropertyDescriptor || throwTest262Error('[[GetOwnProperty]] trap called'),
    has: overrides.has || throwTest262Error('[[HasProperty]] trap called'),
    get: overrides.get || throwTest262Error('[[Get]] trap called'),
    set: overrides.set || throwTest262Error('[[Set]] trap called'),
    deleteProperty: overrides.deleteProperty || throwTest262Error('[[Delete]] trap called'),
    defineProperty: overrides.defineProperty || throwTest262Error('[[DefineOwnProperty]] trap called'),
    enumerate: throwTest262Error('[[Enumerate]] trap called: this trap has been removed'),
    ownKeys: overrides.ownKeys || throwTest262Error('[[OwnPropertyKeys]] trap called'),
    apply: overrides.apply || throwTest262Error('[[Call]] trap called'),
    construct: overrides.construct || throwTest262Error('[[Construct]] trap called')
  };
}