reverse-nonarray-nonwritable-element.js (524B)
1 // Array.prototype.reverse does a strict assignment to this.length even if the 2 // caller is nonstrict. Bug 886087. 3 4 load(libdir + "asserts.js"); 5 6 // obj[1] is read-only 7 var obj = {0: "zero", length: 2, reverse: [].reverse}; 8 Object.defineProperty(obj, "1", {configurable: true, value: "one", writable: false}); 9 assertThrowsInstanceOf(() => obj.reverse(), TypeError); 10 11 // obj[1] has only a getter 12 Object.defineProperty(obj, "1", {configurable: true, get: () => "one"}); 13 assertThrowsInstanceOf(() => obj.reverse(), TypeError);