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// |reftest| async
// This file was procedurally generated from the following sources:
// - src/arguments/args-trailing-comma-undefined.case
// - src/arguments/default/async-gen-func-decl.template
/*---
description: A trailing comma after undefined should not increase the arguments.length (async generator function declaration)
esid: sec-asyncgenerator-definitions-instantiatefunctionobject
features: [async-iteration]
flags: [generated, async]
info: |
AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
( FormalParameters ) { AsyncGeneratorBody }
[...]
3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
scope, strict).
[...]
Trailing comma in the arguments list
Left-Hand-Side Expressions
Arguments :
( )
( ArgumentList )
( ArgumentList , )
ArgumentList :
AssignmentExpression
... AssignmentExpression
ArgumentList , AssignmentExpression
ArgumentList , ... AssignmentExpression
---*/
var callCount = 0;
// Stores a reference `ref` for case evaluation
async function* ref() {
assert.sameValue(arguments.length, 2);
assert.sameValue(arguments[0], 42);
assert.sameValue(arguments[1], undefined);
callCount = callCount + 1;
}
ref(42, undefined,).next().then(() => {
assert.sameValue(callCount, 1, 'generator function invoked exactly once');
}).then($DONE, $DONE);
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