| // 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); |