mirror of
https://github.com/tc39/test262.git
synced 2025-11-03 21:24:30 +01:00
60 lines
2.4 KiB
JavaScript
60 lines
2.4 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/function-forms/forbidden-ext-indirect-access-prop-caller.case
|
|
// - src/function-forms/forbidden-extensions/bullet-two/func-decl.template
|
|
/*---
|
|
description: Forbidden extension, o.caller (function declaration)
|
|
esid: sec-definitions-runtime-semantics-instantiatefunctionobject
|
|
flags: [generated, noStrict]
|
|
info: |
|
|
FunctionDeclaration :
|
|
function BindingIdentifier ( FormalParameters ) { FunctionBody }
|
|
|
|
If an implementation extends any function object with an own property named "caller" the value of
|
|
that property, as observed using [[Get]] or [[GetOwnProperty]], must not be a strict function
|
|
object. If it is an accessor property, the function that is the value of the property's [[Get]]
|
|
attribute must never return a strict function when called.
|
|
|
|
---*/
|
|
var CALLER_OWN_PROPERTY_DOES_NOT_EXIST = Symbol();
|
|
function inner() {
|
|
// This property may exist, but is forbidden from having a value that is a strict function object
|
|
return inner.hasOwnProperty("caller")
|
|
? inner.caller
|
|
: CALLER_OWN_PROPERTY_DOES_NOT_EXIST;
|
|
}
|
|
|
|
var callCount = 0;
|
|
function f() {
|
|
"use strict";
|
|
// This and the following conditional value is set in the test's .case file.
|
|
// For every test that has a "true" value here, there is a
|
|
// corresponding test that has a "false" value here.
|
|
// They are generated from two different case files, which use
|
|
// the same templates.
|
|
let descriptor = Object.getOwnPropertyDescriptor(inner, "caller");
|
|
if (descriptor && descriptor.configurable && false) {
|
|
Object.defineProperty(inner, "caller", {});
|
|
}
|
|
var result = inner();
|
|
if (descriptor && descriptor.configurable && false) {
|
|
assert.sameValue(result, 1, 'If this test defined an own "caller" property on the inner function, then it should be accessible and should return the value it was set to.');
|
|
}
|
|
|
|
// "CALLER_OWN_PROPERTY_DOES_NOT_EXIST" is from
|
|
// forbidden-ext-indirect-access-prop-caller.case
|
|
//
|
|
// If the function object "inner" has an own property
|
|
// named "caller", then its value will be returned.
|
|
//
|
|
// If the function object "inner" DOES NOT have an
|
|
// own property named "caller", then the symbol
|
|
// CALLER_OWN_PROPERTY_DOES_NOT_EXIST will be returned.
|
|
if (result !== CALLER_OWN_PROPERTY_DOES_NOT_EXIST) {
|
|
assert.notSameValue(result, f);
|
|
}
|
|
|
|
callCount++;
|
|
}
|
|
f();
|
|
assert.sameValue(callCount, 1, 'body evaluated');
|