Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/function-forms/dflt-params-arg-val-undefined.case
// - src/function-forms/default/async-func-expr-nameless.template
/*---
description: Use of initializer when argument value is `undefined` (async function nameless expression)
esid: sec-async-function-definitions
features: [default-parameters, async-functions]
flags: [generated, async]
info: |
14.6 Async Function Definitions
AsyncFunctionExpression :
async function ( FormalParameters ) { AsyncFunctionBody }
14.1.19 Runtime Semantics: IteratorBindingInitialization
FormalsList : FormalsList , FormalParameter
[...]
23. Let iteratorRecord be Record {[[Iterator]]:
CreateListIterator(argumentsList), [[Done]]: false}.
24. If hasDuplicates is true, then
[...]
25. Else,
a. Perform ? IteratorBindingInitialization for formals with
iteratorRecord and env as arguments.
[...]
---*/
var callCount = 0;
// Stores a reference `ref` for case evaluation
var ref;
ref = async function(fromLiteral = 23, fromExpr = 45, fromHole = 99) {
assert.sameValue(fromLiteral, 23);
assert.sameValue(fromExpr, 45);
assert.sameValue(fromHole, 99);
callCount = callCount + 1;
};
ref(undefined, void 0).then(() => {
assert.sameValue(callCount, 1, 'function invoked exactly once');
}).then($DONE, $DONE);