tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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star-rhs-iter-get-get-err.js (1231B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-generator-function-definitions-runtime-semantics-evaluation
      5 es6id: 14.4.14
      6 description: Abrupt completion returned when accessing the @@iterator property
      7 info: |
      8  YieldExpression : yield * AssignmentExpression
      9 
     10  1. Let exprRef be the result of evaluating AssignmentExpression.
     11  2. Let value be ? GetValue(exprRef).
     12  3. Let iterator be ? GetIterator(value).
     13 
     14  7.4.1 GetIterator
     15 
     16  1. If method was not passed, then
     17     a. Let method be ? GetMethod(obj, @@iterator).
     18 features: [generators, Symbol.iterator]
     19 ---*/
     20 
     21 var thrown = new Test262Error();
     22 var poisonedIter = Object.defineProperty({}, Symbol.iterator, {
     23  get: function() {
     24    throw thrown;
     25  }
     26 });
     27 function* g() {
     28  try {
     29    yield * poisonedIter;
     30  } catch (err) {
     31    caught = err;
     32  }
     33 }
     34 var iter = g();
     35 var result, caught;
     36 
     37 assert.sameValue(caught, undefined, 'property is not accessed eagerly');
     38 
     39 result = iter.next();
     40 
     41 assert.sameValue(result.value, undefined, 'iteration value');
     42 assert.sameValue(result.done, true, 'iteration status');
     43 assert.sameValue(caught, thrown, 'error value');
     44 
     45 reportCompare(0, 0);