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async-gen-dstr-let-ary-ptrn-rest-id-iter-val-err.js (2401B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding-for-await/ary-ptrn-rest-id-iter-val-err.case
      4 // - src/dstr-binding-for-await/error/for-await-of-async-gen-let.template
      5 /*---
      6 description: Error forwarding when IteratorValue returns an abrupt completion (for-await-of statement)
      7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
      8 features: [Symbol.iterator, destructuring-binding, async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    IterationStatement :
     12        for await ( var ForBinding of AssignmentExpression ) Statement
     13 
     14    [...]
     15    2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult,
     16        varBinding, labelSet, async).
     17 
     18    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
     19 
     20    [...]
     21    4. Let destructuring be IsDestructuring of lhs.
     22    [...]
     23    6. Repeat
     24       [...]
     25       j. If destructuring is false, then
     26          [...]
     27       k. Else
     28          i. If lhsKind is assignment, then
     29             [...]
     30          ii. Else if lhsKind is varBinding, then
     31              [...]
     32          iii. Else,
     33               1. Assert: lhsKind is lexicalBinding.
     34               2. Assert: lhs is a ForDeclaration.
     35               3. Let status be the result of performing BindingInitialization
     36                  for lhs passing nextValue and iterationEnv as arguments.
     37          [...]
     38 
     39    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     40    BindingRestElement : ... BindingIdentifier
     41    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     42       environment).
     43    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     44       [...]
     45       c. Let nextValue be IteratorValue(next).
     46       d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to
     47          true.
     48       e. ReturnIfAbrupt(nextValue).
     49 
     50 ---*/
     51 var poisonedValue = Object.defineProperty({}, 'value', {
     52  get: function() {
     53    throw new Test262Error();
     54  }
     55 });
     56 var iter = {};
     57 iter[Symbol.iterator] = function() {
     58  return {
     59    next() {
     60      return poisonedValue;
     61    }
     62  };
     63 };
     64 
     65 async function * gen() {
     66  for await (let [...x] of [iter]) {
     67    return;
     68  }
     69 }
     70 
     71 gen().next()
     72  .then(_ => {
     73    throw new Test262Error("Expected async function to reject, but resolved.");
     74  }, ({ constructor }) => {
     75    assert.sameValue(constructor, Test262Error);
     76    
     77  })
     78  .then($DONE, $DONE);