| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../../resources/js-test-pre.js"></script> |
| <script> |
| description("Tests various cases of const variable shadowing on Window."); |
| |
| let sentinel = "good"; |
| </script> |
| <script> |
| debug("Should throw because Window has a non-configurable location own property."); |
| </script> |
| <script> |
| const location = 3; |
| sentinel = "bad"; |
| </script> |
| <script> |
| shouldBeEqualToString("sentinel", "good"); |
| </script> |
| |
| <script> |
| debug(""); |
| debug("Should throw because window has an own property foo that is not configurable, even though its value is undefined."); |
| Object.defineProperty(window, 'foo', {value: undefined, configurable: false, writable: true}); |
| </script> |
| <script> |
| const foo = 3; |
| sentinel = "bad"; |
| </script> |
| <script> |
| shouldBeEqualToString("sentinel", "good"); |
| </script> |
| |
| <script> |
| debug(""); |
| debug("Should work because Window's own bar property is configurable."); |
| Object.defineProperty(window, 'bar', {value: 2, configurable: true, writable: true}); |
| sentinel = "bad"; |
| </script> |
| <script> |
| const bar = 3; |
| sentinel = "good"; |
| shouldBe("bar", "3"); |
| </script> |
| <script> |
| shouldBeEqualToString("sentinel", "good"); |
| </script> |
| |
| <script> |
| debug(""); |
| debug("Should work because dispatchEvent is not an own property, it comes from the prototype chain."); |
| sentinel = "bad" |
| </script> |
| <script> |
| const dispatchEvent = 3; |
| sentinel = "good"; |
| shouldBe("dispatchEvent", "3"); |
| </script> |
| <script> |
| shouldBeEqualToString("sentinel", "good"); |
| </script> |
| |
| <script> |
| successfullyParsed = true; |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
