text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding/ary-ptrn-elision.case
  // - src/dstr-binding/default/cls-expr-async-gen-meth-dflt.template
  /*---
  description: Elision advances iterator (class expression async generator method (default parameter))
  esid: sec-class-definitions-runtime-semantics-evaluation
  features: [generators, async-iteration]
  flags: [generated, async]
  info: |
      ClassExpression : class BindingIdentifieropt ClassTail
  
      1. If BindingIdentifieropt is not present, let className be undefined.
      2. Else, let className be StringValue of BindingIdentifier.
      3. Let value be the result of ClassDefinitionEvaluation of ClassTail
         with argument className.
      [...]
  
      14.5.14 Runtime Semantics: ClassDefinitionEvaluation
  
      21. For each ClassElement m in order from methods
          a. If IsStatic of m is false, then
             i. Let status be the result of performing
                PropertyDefinitionEvaluation for m with arguments proto and
                false.
          [...]
  
      Runtime Semantics: PropertyDefinitionEvaluation
  
      AsyncGeneratorMethod :
          async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
              { AsyncGeneratorBody }
  
      1. Let propKey be the result of evaluating PropertyName.
      2. ReturnIfAbrupt(propKey).
      3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
         Otherwise let strict be false.
      4. Let scope be the running execution context's LexicalEnvironment.
      5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
         AsyncGeneratorBody, scope, strict).
      [...]
  
  
      13.3.3.6 Runtime Semantics: IteratorBindingInitialization
  
      ArrayBindingPattern : [ Elision ]
  
      1. Return the result of performing
         IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
         as the argument.
  
      12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
  
      Elision : ,
  
      1. If iteratorRecord.[[done]] is false, then
         a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
         b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
         c. ReturnIfAbrupt(next).
         d. If next is false, set iteratorRecord.[[done]] to true.
      2. Return NormalCompletion(empty).
  
  ---*/
  var first = 0;
  var second = 0;
  function* g() {
    first += 1;
    yield;
    second += 1;
  };
  
  
  var callCount = 0;
  var C = class {
    async *method([,] = g()) {
      assert.sameValue(first, 1);
      assert.sameValue(second, 0);
      callCount = callCount + 1;
    }
  };
  
  new C().method().next().then(() => {
      assert.sameValue(callCount, 1, 'invoked exactly once');    
  }).then($DONE, $DONE);
  