bug901979-2.js - mozsearch

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// A proxy on the prototype chain of the global should not observe anything at

// all about lazy resolution of globals.

load(libdir + "immutable-prototype.js");

var global = this;

var status = "pass";

// This is a little tricky. There are two proxies.

// 1. handler is a proxy that fails the test if you try to call a method on it.

var metaHandler = {

  get: _ => { status = "SMASH"; },

  has: _ => { status = "SMASH"; },

  invoke: _ => { status = "SMASH"; }

};

var handler = new Proxy({}, metaHandler);

// 2. Then we create a proxy using 'handler' as its handler. This means the test

//    will fail if *any* method of the handler is called, not just get/has/invoke.

var angryProxy = new Proxy(Object.create(null), handler);

if (globalPrototypeChainIsMutable()) {

  this.__proto__ = angryProxy;

  Object.prototype.__proto__ = angryProxy;

// Trip the alarm once, to make sure the proxies are working.

this.nonExistingProperty;

if (globalPrototypeChainIsMutable())

  assertEq(status, "SMASH");

else

  assertEq(status, "pass");

// OK. Reset the status and run the actual test.

status = "pass";

Map;

ArrayBuffer;

Date;

assertEq(status, "pass");