text: // This file was procedurally generated from the following sources:
  // - src/function-forms/params-trailing-comma-single.case
  // - src/function-forms/default/async-func-decl.template
  /*---
  description: A trailing comma should not increase the respective length, using a single parameter (async function declaration)
  esid: sec-async-function-definitions
  flags: [generated, async]
  info: |
      14.6 Async Function Definitions
  
      AsyncFunctionDeclaration :
        async function BindingIdentifier ( FormalParameters ) { AsyncFunctionBody }
  
  
      Trailing comma in the parameters list
  
      14.1 Function Definitions
  
      FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
  ---*/
  
  
  var callCount = 0;
  
  // Stores a reference `ref` for case evaluation
  async function ref(a,) {
    assert.sameValue(a, 42);
    callCount = callCount + 1;
  }
  
  ref(42, 39).then(() => {
      assert.sameValue(callCount, 1, 'function invoked exactly once');
  }).then($DONE, $DONE);
  
  assert.sameValue(ref.length, 1, 'length is properly set');
  