michael@0: // Array.prototype.reverse does a strict assignment to this.length even if the
michael@0: // caller is nonstrict. Bug 886087.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: // obj[1] is read-only
michael@0: var obj = {0: "zero", length: 2, reverse: [].reverse};
michael@0: Object.defineProperty(obj, "1", {configurable: true, value: "one", writable: false});
michael@0: assertThrowsInstanceOf(() => obj.reverse(), TypeError);
michael@0: 
michael@0: // obj[1] has only a getter
michael@0: Object.defineProperty(obj, "1", {configurable: true, get: () => "one"});
michael@0: assertThrowsInstanceOf(() => obj.reverse(), TypeError);