mirror of
https://github.com/tc39/test262.git
synced 2025-10-31 11:44:31 +01:00
46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/obj-ptrn-id-init-skipped.case
|
|
// - src/dstr-binding/default/async-gen-func-decl.template
|
|
/*---
|
|
description: Destructuring initializer is not evaluated when value is not `undefined` (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).
|
|
[...]
|
|
|
|
|
|
13.3.3.7 Runtime Semantics: KeyedBindingInitialization
|
|
|
|
SingleNameBinding : BindingIdentifier Initializeropt
|
|
|
|
[...]
|
|
6. If Initializer is present and v is undefined, then
|
|
[...]
|
|
[...]
|
|
---*/
|
|
var initCount = 0;
|
|
function counter() {
|
|
initCount += 1;
|
|
}
|
|
|
|
|
|
var callCount = 0;
|
|
async function* f({ w = counter(), x = counter(), y = counter(), z = counter() }) {
|
|
assert.sameValue(w, null);
|
|
assert.sameValue(x, 0);
|
|
assert.sameValue(y, false);
|
|
assert.sameValue(z, '');
|
|
assert.sameValue(initCount, 0);
|
|
callCount = callCount + 1;
|
|
};
|
|
f({ w: null, x: 0, y: false, z: '' }).next().then(() => {
|
|
assert.sameValue(callCount, 1, 'invoked exactly once');
|
|
}).then($DONE, $DONE);
|