| function assert(a) { |
| if (!a) |
| throw Error("Bad assertion!"); |
| } |
| |
| function testProperties(o, initProperty, testProperty, shouldThrow) { |
| Object.defineProperty(arguments, 0, initProperty); |
| |
| if (shouldThrow) { |
| try { |
| Object.defineProperty(arguments, 0, testProperty); |
| assert(false); |
| } catch(e) { |
| assert(e instanceof TypeError); |
| } |
| } else { |
| assert(Object.defineProperty(arguments, 0, testProperty)); |
| } |
| } |
| |
| testProperties("foo", {configurable: false}, {writable: true}, false); |
| testProperties("foo", {configurable: false}, {configurable: true}, true); |
| testProperties("foo", {configurable: false, enumareble: true}, {enumerable: false}, true); |
| testProperties("foo", {configurable: false, writable: false}, {writable: false}, false); |
| testProperties("foo", {configurable: false, writable: false}, {writable: true}, true); |
| testProperties("foo", {configurable: false, writable: false, value: 50}, {value: 30}, true); |
| testProperties("foo", {configurable: false, writable: false, value: 30}, {value: 30}, false); |
| testProperties("foo", {configurable: false, get: () => {return 0}}, {get: () => {return 10}}, true); |
| let getterFoo = () => {return 0}; |
| testProperties("foo", {configurable: false, get: getterFoo}, {get: getterFoo}, false); |
| testProperties("foo", {configurable: false, set: (x) => {return 0}}, {get: (x) => {return 10}}, true); |
| let setterFoo = (x) => {return 0}; |
| testProperties("foo", {configurable: false, set: setterFoo}, {set: setterFoo}, false); |
| |