cross-realm-iterator-lookup.js

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// Test for `arguments[Symbol.iterator]` lookups on a cross-realm ArgumentsObject.

// The result must have the same realm as the object.

function test() {

  var g = newGlobal({sameCompartmentAs: this});

  for (var i = 0; i < 30; i++) {

    var myRealmArgs = (function() { return arguments; })(1, 2, 3);

    var crossRealmArgs = g.evaluate(`(function() { return arguments; })(1, 2, 3)`);

    var args = (i & 1) ? myRealmArgs : crossRealmArgs;

    var createIter = args[Symbol.iterator];

    assertEq(objectGlobal(createIter), (i & 1) ? this : g);

    var iter = createIter.call(args);

    assertEq(objectGlobal(iter), (i & 1) ? this : g);

    assertEq(iter.next().value, 1);

test();