tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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async-gen-meth-ary-init-iter-no-close.js (2437B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding/ary-init-iter-no-close.case
      4 // - src/dstr-binding/default/cls-expr-async-gen-meth.template
      5 /*---
      6 description: Iterator is not closed when exhausted by pattern evaluation (class expression method)
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [Symbol.iterator, async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    ClassExpression : class BindingIdentifieropt ClassTail
     12 
     13    1. If BindingIdentifieropt is not present, let className be undefined.
     14    2. Else, let className be StringValue of BindingIdentifier.
     15    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     16       with argument className.
     17    [...]
     18 
     19    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     20 
     21    21. For each ClassElement m in order from methods
     22        a. If IsStatic of m is false, then
     23           i. Let status be the result of performing
     24              PropertyDefinitionEvaluation for m with arguments proto and
     25              false.
     26        [...]
     27 
     28    Runtime Semantics: PropertyDefinitionEvaluation
     29 
     30    AsyncGeneratorMethod :
     31        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     32            { AsyncGeneratorBody }
     33 
     34    1. Let propKey be the result of evaluating PropertyName.
     35    2. ReturnIfAbrupt(propKey).
     36    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     37       Otherwise let strict be false.
     38    4. Let scope be the running execution context's LexicalEnvironment.
     39    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     40       AsyncGeneratorBody, scope, strict).
     41    [...]
     42 
     43 
     44    13.3.3.5 Runtime Semantics: BindingInitialization
     45 
     46    BindingPattern : ArrayBindingPattern
     47 
     48    [...]
     49    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
     50       result).
     51    [...]
     52 
     53 ---*/
     54 var doneCallCount = 0;
     55 var iter = {};
     56 iter[Symbol.iterator] = function() {
     57  return {
     58    next: function() {
     59      return { value: null, done: true };
     60    },
     61    return: function() {
     62      doneCallCount += 1;
     63      return {};
     64    }
     65  };
     66 };
     67 
     68 
     69 var callCount = 0;
     70 var C = class {
     71  async *method([x]) {
     72    assert.sameValue(doneCallCount, 0);
     73    callCount = callCount + 1;
     74  }
     75 };
     76 
     77 new C().method(iter).next().then(() => {
     78    assert.sameValue(callCount, 1, 'invoked exactly once');    
     79 }).then($DONE, $DONE);