tor-browser

The Tor Browser
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async-gen-meth-dflt-ary-ptrn-rest-id-direct.js (2341B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding/ary-ptrn-rest-id-direct.case
      4 // - src/dstr-binding/default/cls-expr-async-gen-meth-dflt.template
      5 /*---
      6 description: Lone rest element (direct binding) (class expression async generator method (default parameter))
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [async-iteration]
      9 flags: [generated, async]
     10 includes: [compareArray.js]
     11 info: |
     12    ClassExpression : class BindingIdentifieropt ClassTail
     13 
     14    1. If BindingIdentifieropt is not present, let className be undefined.
     15    2. Else, let className be StringValue of BindingIdentifier.
     16    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     17       with argument className.
     18    [...]
     19 
     20    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     21 
     22    21. For each ClassElement m in order from methods
     23        a. If IsStatic of m is false, then
     24           i. Let status be the result of performing
     25              PropertyDefinitionEvaluation for m with arguments proto and
     26              false.
     27        [...]
     28 
     29    Runtime Semantics: PropertyDefinitionEvaluation
     30 
     31    AsyncGeneratorMethod :
     32        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     33            { AsyncGeneratorBody }
     34 
     35    1. Let propKey be the result of evaluating PropertyName.
     36    2. ReturnIfAbrupt(propKey).
     37    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     38       Otherwise let strict be false.
     39    4. Let scope be the running execution context's LexicalEnvironment.
     40    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     41       AsyncGeneratorBody, scope, strict).
     42    [...]
     43 
     44 
     45    Runtime Semantics: IteratorBindingInitialization
     46 
     47    BindingRestElement : ... BindingIdentifier
     48 
     49    [...]
     50    2. Let A be ! ArrayCreate(0).
     51    3. Let n be 0.
     52    4. Repeat,
     53        [...]
     54        f. Perform ! CreateDataPropertyOrThrow(A, ! ToString(n), nextValue).
     55        g. Set n to n + 1.
     56 
     57 ---*/
     58 
     59 
     60 var callCount = 0;
     61 var C = class {
     62  async *method([...x] = [1]) {
     63    assert(Array.isArray(x));
     64    assert.compareArray(x, [1]);
     65    callCount = callCount + 1;
     66  }
     67 };
     68 
     69 new C().method().next().then(() => {
     70    assert.sameValue(callCount, 1, 'invoked exactly once');    
     71 }).then($DONE, $DONE);