| <!DOCTYPE html> |
| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| promise_test(async () => { |
| // Demonstrate that the object was in fact cloned, and is not the original |
| // object leaking between worlds. |
| const detail = { foo: 1 }; |
| performance.mark("m", { detail }); |
| const mark = performance.getEntriesByName("m")[0]; |
| assert_equals(mark.detail, mark.detail, "each access should produce the same object"); |
| assert_not_equals(mark.detail, detail, "the object should be a clone, not the original"); |
| assert_equals(Object.getPrototypeOf(mark.detail), Object.prototype, |
| "main world object should have the right prototype"); |
| |
| testRunner.evaluateScriptInIsolatedWorld(1, |
| `const mark = performance.getEntriesByName("m")[0]; |
| mark.detail.foo = 2; |
| performance.mark("m2", { detail: { |
| hasRightPrototype: Object.getPrototypeOf(mark.detail) === Object.prototype |
| } });`); |
| assert_equals(detail.foo, 1, "original object shouldn't be mutated through a clone"); |
| assert_equals(mark.detail.foo, 1, "main world clone shouldn't be mutated through isolated clone"); |
| assert_true(performance.getEntriesByName("m2")[0].detail.hasRightPrototype, |
| "isolated world object should have the right prototype"); |
| }, "A clone should be used in an isolated world, but only one clone"); |
| </script> |
