tor-browser

The Tor Browser
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async-gen-meth-dflt-ary-ptrn-elem-id-iter-val.js (2112B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding/ary-ptrn-elem-id-iter-val.case
      4 // - src/dstr-binding/default/async-gen-method-dflt.template
      5 /*---
      6 description: SingleNameBinding when value iteration was completed previously (async generator method (default parameter))
      7 esid: sec-asyncgenerator-definitions-propertydefinitionevaluation
      8 features: [async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    AsyncGeneratorMethod :
     12        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     13            { AsyncGeneratorBody }
     14 
     15    1. Let propKey be the result of evaluating PropertyName.
     16    2. ReturnIfAbrupt(propKey).
     17    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     18       Otherwise let strict be false.
     19    4. Let scope be the running execution context's LexicalEnvironment.
     20    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     21       AsyncGeneratorBody, scope, strict).
     22    [...]
     23 
     24 
     25    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     26 
     27    SingleNameBinding : BindingIdentifier Initializeropt
     28 
     29    [...]
     30    4. If iteratorRecord.[[done]] is false, then
     31       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     32       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     33       c. ReturnIfAbrupt(next).
     34       d. If next is false, set iteratorRecord.[[done]] to true.
     35       e. Else,
     36          [...]
     37          i. Let v be IteratorValue(next).
     38          ii. If v is an abrupt completion, set
     39              iteratorRecord.[[done]] to true.
     40          iii. ReturnIfAbrupt(v).
     41    5. If iteratorRecord.[[done]] is true, let v be undefined.
     42    [...]
     43    8. Return InitializeReferencedBinding(lhs, v).
     44 ---*/
     45 
     46 
     47 var callCount = 0;
     48 var obj = {
     49  async *method([x, y, z] = [1, 2, 3]) {
     50    assert.sameValue(x, 1);
     51    assert.sameValue(y, 2);
     52    assert.sameValue(z, 3);
     53    callCount = callCount + 1;
     54  }
     55 };
     56 
     57 obj.method().next().then(() => {
     58    assert.sameValue(callCount, 1, 'invoked exactly once');
     59 }).then($DONE, $DONE);