reverse-nonarray-nonwritable-element.js

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// Array.prototype.reverse does a strict assignment to this.length even if the

// caller is nonstrict. Bug 886087.

load(libdir + "asserts.js");

// obj[1] is read-only

var obj = {0: "zero", length: 2, reverse: [].reverse};

Object.defineProperty(obj, "1", {configurable: true, value: "one", writable: false});

assertThrowsInstanceOf(() => obj.reverse(), TypeError);

// obj[1] has only a getter

Object.defineProperty(obj, "1", {configurable: true, get: () => "one"});

assertThrowsInstanceOf(() => obj.reverse(), TypeError);