iterator-noSuchMethod.js

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// __noSuchMethod__ is totally non-standard and evil, but in this one weird case

// below we don't actually use it.  So this test is bog-standard ES6, not

// SpiderMonkey-specific.

//

// In ES6:

//   Accessing 1[Symbol.iterator]() throws a TypeError calling |undefined|.

// In SpiderMonkey:

//   Accessing 1[Symbol.iterator]() does *not* invoke __noSuchMethod__ looked up

//   on 1 (or on an implicitly boxed 1), because 1 is a primitive value.

//   SpiderMonkey then does exactly the ES6 thing here and throws a TypeError

//   calling |undefined|.

Object.prototype.__noSuchMethod__ = {};

try

  var [x] = 1;

  throw new Error("didn't throw");

catch (e)

  assertEq(e instanceof TypeError, true,

           "expected TypeError, got " + e);