tor-browser

The Tor Browser
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yield-star-getiter-async-not-callable-number-throw.js (3142B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/async-generators/yield-star-getiter-async-not-callable-number-throw.case
      4 // - src/async-generators/default/async-class-decl-private-method.template
      5 /*---
      6 description: Throws a TypeError on a non-callable [Symbol.asyncIterator] (number) (Async Generator method as a ClassDeclaration 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    ...
     37 
     38    GetMethod ( V, P )
     39 
     40    ...
     41    2. Let func be ? GetV(V, P).
     42    3. If func is either undefined or null, return undefined.
     43    4. If IsCallable(func) is false, throw a TypeError exception.
     44    ...
     45 
     46 ---*/
     47 var obj = {
     48  get [Symbol.iterator]() {
     49    throw new Test262Error('it should not get Symbol.iterator');
     50  },
     51  [Symbol.asyncIterator]: 0
     52 };
     53 
     54 
     55 
     56 var callCount = 0;
     57 
     58 class C {
     59    async *#gen() {
     60        callCount += 1;
     61        yield* obj;
     62          throw new Test262Error('abrupt completion closes iter');
     63 
     64    }
     65    get gen() { return this.#gen; }
     66 }
     67 
     68 const c = new C();
     69 
     70 // Test the private fields do not appear as properties before set to value
     71 assert(
     72  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
     73  "#gen does not appear as an own property on C prototype"
     74 );
     75 assert(
     76  !Object.prototype.hasOwnProperty.call(C, "#gen"),
     77  "#gen does not appear as an own property on C constructor"
     78 );
     79 assert(
     80  !Object.prototype.hasOwnProperty.call(c, "#gen"),
     81  "#gen does not appear as an own property on C instance"
     82 );
     83 
     84 var iter = c.gen();
     85 
     86 iter.next().then(() => {
     87  throw new Test262Error('Promise incorrectly fulfilled.');
     88 }, v => {
     89  assert.sameValue(v.constructor, TypeError, "TypeError");
     90 
     91  iter.next().then(({ done, value }) => {
     92    assert.sameValue(done, true, 'the iterator is completed');
     93    assert.sameValue(value, undefined, 'value is undefined');
     94  }).then($DONE, $DONE);
     95 }).catch($DONE);
     96 
     97 assert.sameValue(callCount, 1);
     98 
     99 // Test the private fields do not appear as properties after set to value
    100 assert(
    101  !Object.prototype.hasOwnProperty.call(C.prototype, "#gen"),
    102  "#gen does not appear as an own property on C prototype"
    103 );
    104 assert(
    105  !Object.prototype.hasOwnProperty.call(C, "#gen"),
    106  "#gen does not appear as an own property on C constructor"
    107 );
    108 assert(
    109  !Object.prototype.hasOwnProperty.call(c, "#gen"),
    110  "#gen does not appear as an own property on C instance"
    111 );