symbol-object-not-unboxed-for-value-to-id.js

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// Create a symbol and a wrapper for it.

var s = Symbol();

var so = Object(s);

// Create a symbol-valued property key using |s|.

var o = {[s]: 0};

// The default Symbol.prototype[@@toPrimitive] will unbox the symbol object as needed.

assertEq(o.propertyIsEnumerable(so), true);

assertEq(o.hasOwnProperty(so), true);

// After redefining Symbol.prototype[@@toPrimitive], any calls to the ToPropertyKey

// abstract operation will no longer unbox the symbol object.

Object.defineProperty(Symbol.prototype, Symbol.toPrimitive, {

    value: function() {

        return "foo";

});

// |o| doesn't have a string-valued property named "foo".

assertEq(o.propertyIsEnumerable(so), false);

assertEq(o.hasOwnProperty(so), false);

o.foo = 123;

// After |o.foo| was added, both calls should return true again.

assertEq(o.propertyIsEnumerable(so), true);

assertEq(o.hasOwnProperty(so), true);

if (typeof reportCompare === "function")

    reportCompare(0, 0);