test_allowWaivers.js

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function checkWaivers(from, allowed) {

  var sb = new Cu.Sandbox('http://example.com');

  from.test = sb.eval('var o = {prop: 2, f: function() {return 42;}}; o');

  // Make sure that |from| has Xrays to sb.

  Assert.equal(from.eval('test.prop'), 2);

  Assert.equal(from.eval('test.f'), undefined);

  // Make sure that waivability works as expected.

  Assert.equal(from.eval('!!test.wrappedJSObject'), allowed);

  Assert.equal(from.eval('XPCNativeWrapper.unwrap(test) !== test'), allowed);

  // Make a sandbox with the same principal as |from|, but without any waiver

  // restrictions, and make sure that the waiver does not transfer.

  var friend = new Cu.Sandbox(Cu.getObjectPrincipal(from));

  friend.test = from.test;

  friend.eval('var waived = test.wrappedJSObject;');

  Assert.equal(friend.eval('waived.f()'), 42);

  friend.from = from;

  friend.eval('from.waived = waived');

  Assert.equal(from.eval('!!waived.f'), allowed);

function run_test() {

  checkWaivers(new Cu.Sandbox('http://example.com'), true);

  checkWaivers(new Cu.Sandbox('http://example.com', {allowWaivers: false}), false);

  checkWaivers(new Cu.Sandbox(['http://example.com']), true);

  checkWaivers(new Cu.Sandbox(['http://example.com'], {allowWaivers: false}), false);