test262/test/language/expressions/async-generator/params-named-dflt-arg-val-undefined.js
Leo Balter 20d496729d
Rename src/params to src/function-forms
The templates are being used for many tests reusing the same available function forms.
The format they are provided allow us to extend tests with cases for other tests relying
in the same formats.
2017-04-21 15:03:46 -04:00

49 lines
1.6 KiB
JavaScript

// This file was procedurally generated from the following sources:
// - src/function-forms/dflt-arg-val-undefined.case
// - src/function-forms/default/async-gen-named-func-expr.template
/*---
description: Use of intializer when argument value is `undefined` (async generator named function expression)
esid: sec-asyncgenerator-definitions-evaluation
features: [default-parameters, async-iteration]
flags: [generated, async]
info: |
AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier
( FormalParameters ) { AsyncGeneratorBody }
[...]
7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
AsyncGeneratorBody, funcEnv, strict).
[...]
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* g(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).next().then(() => {
assert.sameValue(callCount, 1, 'generator function invoked exactly once');
}).then($DONE, $DONE);