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cls-expr-async-gen-meth-static-args-trailing-comma-spread-operator.js (2599B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/arguments/args-trailing-comma-spread-operator.case
      4 // - src/arguments/default/cls-expr-async-gen-meth-static.template
      5 /*---
      6 description: A trailing comma should not increase the arguments.length, using spread args (static class expression async generator method)
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [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        b. Else,
     24           Let status be the result of performing PropertyDefinitionEvaluation
     25           for m with arguments F and 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    Trailing comma in the arguments list
     45 
     46    Left-Hand-Side Expressions
     47 
     48    Arguments :
     49        ( )
     50        ( ArgumentList )
     51        ( ArgumentList , )
     52 
     53    ArgumentList :
     54        AssignmentExpression
     55        ... AssignmentExpression
     56        ArgumentList , AssignmentExpression
     57        ArgumentList , ... AssignmentExpression
     58 ---*/
     59 var arr = [2, 3];
     60 
     61 
     62 
     63 var callCount = 0;
     64 var C = class {
     65  static async *method() {
     66    assert.sameValue(arguments.length, 4);
     67    assert.sameValue(arguments[0], 42);
     68    assert.sameValue(arguments[1], 1);
     69    assert.sameValue(arguments[2], 2);
     70    assert.sameValue(arguments[3], 3);
     71    callCount = callCount + 1;
     72  }
     73 };
     74 
     75 // Stores a reference `ref` for case evaluation
     76 var ref = C.method;
     77 
     78 ref(42, ...[1], ...arr,).next().then(() => {
     79    assert.sameValue(callCount, 1, 'method invoked exactly once');
     80 }).then($DONE, $DONE);