tor-browser

The Tor Browser
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yield-star-getiter-async-null-sync-get-abrupt.js (3153B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/async-generators/yield-star-getiter-async-null-sync-get-abrupt.case
      4 // - src/async-generators/default/async-class-expr-private-method.template
      5 /*---
      6 description: Abrupt completion while getting @@iterator after null @@asyncIterator (Async generator method as a ClassExpression element)
      7 esid: prod-AsyncGeneratorPrivateMethod
      8 features: [Symbol.iterator, Symbol.asyncIterator, async-iteration, class-methods-private]
      9 flags: [generated, async]
     10 info: |
     11    ClassElement :
     12      PrivateMethodDefinition
     13 
     14    MethodDefinition :
     15      AsyncGeneratorMethod
     16 
     17    Async Generator Function Definitions
     18 
     19    AsyncGeneratorMethod :
     20      async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }
     21 
     22 
     23    YieldExpression: yield * AssignmentExpression
     24 
     25    1. Let exprRef be the result of evaluating AssignmentExpression.
     26    2. Let value be ? GetValue(exprRef).
     27    3. Let generatorKind be ! GetGeneratorKind().
     28    4. Let iterator be ? GetIterator(value, generatorKind).
     29    ...
     30 
     31    GetIterator ( obj [ , hint ] )
     32 
     33    ...
     34    3. If hint is async,
     35      a. Set method to ? GetMethod(obj, @@asyncIterator).
     36      b. If method is undefined,
     37        i. Let syncMethod be ? GetMethod(obj, @@iterator).
     38    ...
     39 
     40    GetMethod ( V, P )
     41 
     42    ...
     43    2. Let func be ? GetV(V, P).
     44    ...
     45 
     46 ---*/
     47 var calls = 0;
     48 var reason = {};
     49 var obj = {
     50  get [Symbol.iterator]() {
     51    throw reason;
     52  },
     53  get [Symbol.asyncIterator]() {
     54    calls += 1;
     55    return null;
     56  }
     57 };
     58 
     59 
     60 
     61 var callCount = 0;
     62 
     63 var C = class {
     64    async *#gen() {
     65        callCount += 1;
     66        yield* obj;
     67          throw new Test262Error('abrupt completion closes iter');
     68 
     69    }
     70    get gen() { return this.#gen; }
     71 }
     72 
     73 const c = new C();
     74 
     75 // Test the private fields do not appear as properties before set to value
     76 assert(
     77  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
     78  "#gen does not appear as an own property on C prototype"
     79 );
     80 assert(
     81  !Object.prototype.hasOwnProperty.call(C, "#gen"),
     82  "#gen does not appear as an own property on C constructor"
     83 );
     84 assert(
     85  !Object.prototype.hasOwnProperty.call(c, "#gen"),
     86  "#gen does not appear as an own property on C instance"
     87 );
     88 
     89 var iter = c.gen();
     90 
     91 iter.next().then(() => {
     92  throw new Test262Error('Promise incorrectly fulfilled.');
     93 }, v => {
     94  assert.sameValue(v, reason, 'reject reason');
     95  assert.sameValue(calls, 1);
     96 
     97  iter.next().then(({ done, value }) => {
     98    assert.sameValue(done, true, 'the iterator is completed');
     99    assert.sameValue(value, undefined, 'value is undefined');
    100  }).then($DONE, $DONE);
    101 }).catch($DONE);
    102 
    103 assert.sameValue(callCount, 1);
    104 
    105 // Test the private fields do not appear as properties after set to value
    106 assert(
    107  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
    108  "#gen does not appear as an own property on C prototype"
    109 );
    110 assert(
    111  !Object.prototype.hasOwnProperty.call(C, "#gen"),
    112  "#gen does not appear as an own property on C constructor"
    113 );
    114 assert(
    115  !Object.prototype.hasOwnProperty.call(c, "#gen"),
    116  "#gen does not appear as an own property on C instance"
    117 );