text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding/ary-ptrn-elem-ary-empty-init.case
  // - src/dstr-binding/default/async-gen-func-expr.template
  /*---
  description: BindingElement with array binding pattern and initializer is used (async generator function expression)
  esid: sec-asyncgenerator-definitions-evaluation
  features: [async-iteration]
  flags: [generated, async]
  info: |
      AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) {
          AsyncGeneratorBody }
  
          [...]
          3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
             AsyncGeneratorBody, scope, strict).
          [...]
  
  
      13.3.3.6 Runtime Semantics: IteratorBindingInitialization
  
      BindingElement : BindingPatternInitializer opt
  
      [...]
      2. If iteratorRecord.[[done]] is true, let v be undefined.
      3. If Initializer is present and v is undefined, then
         a. Let defaultValue be the result of evaluating Initializer.
         b. Let v be ? GetValue(defaultValue).
      4. Return the result of performing BindingInitialization of BindingPattern
         with v and environment as the arguments.
  ---*/
  var initCount = 0;
  var iterCount = 0;
  var iter = function*() { iterCount += 1; }();
  
  
  var callCount = 0;
  var f;
  f = async function*([[] = function() { initCount += 1; return iter; }()]) {
    assert.sameValue(initCount, 1);
    assert.sameValue(iterCount, 0);
    callCount = callCount + 1;
  };
  
  f([]).next().then(() => {
      assert.sameValue(callCount, 1, 'invoked exactly once');
  }).then($DONE, $DONE);
  