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