8023368: Instance __proto__ property should exist and be writable.
Reviewed-by: attila, hannesw
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/**
* NASHORN-378 : Redefining a configurable accessor property to be a data property on a non-extensible object fails with NPE
*
* @test
* @run
*/
var obj = {};
Object.defineProperty(obj, "foo",
{ get: function() { return 42; },
configurable: true});
if (obj.foo !== 42) {
fail("#0 obj.foo !== 42");
}
Object.preventExtensions(obj);
Object.defineProperty(obj, "foo", { value: "hello"});
var desc = Object.getOwnPropertyDescriptor(obj, "foo");
if (obj.foo !== "hello") {
fail("#1 obj.foo !== 'hello'");
}
if (desc.get !== undefined) {
fail("#2 getter found on a date property");
}
if (desc.set !== undefined) {
fail("#3 setter found on a date property");
}
if (desc.value !== 'hello') {
fail("#4 value property is wrong");
}