| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/get-host-info.sub.js"></script> |
| |
| <script> |
| // If document.open's behavior is modified to remove the url-rewriting behavior, |
| // then this test can be deleted (https://github.com/whatwg/html/issues/3989). |
| setup({ explicit_done: true }); |
| |
| window.start = childDocument => { |
| const grandchildDocument = |
| childDocument.querySelector('iframe').contentDocument; |
| |
| test(t => { |
| // Clean up the iframe so that the dangling document.open() doesn't cause a |
| // harness timeout. |
| t.add_cleanup(() => { |
| document.querySelector('iframe').remove(); |
| }); |
| |
| assert_equals(childDocument.URL, 'about:srcdoc', |
| 'Child document starting URL'); |
| assert_equals(grandchildDocument.URL, 'about:blank', |
| 'Grandchild document starting URL'); |
| const originalChildBaseURL = childDocument.baseURI; |
| |
| grandchildDocument.open("", ""); |
| // Verify that the document.open() trick worked: the grandchild should now |
| // have the same url as the child, and have inherited the child's base url. |
| assert_equals(grandchildDocument.URL, 'about:srcdoc', |
| 'Grandchild document after document.open() trick'); |
| assert_equals(grandchildDocument.baseURI, originalChildBaseURL, |
| 'Grandchild base URL must match child base URL'); |
| |
| // Give child a new base URL. |
| const baseElement = childDocument.createElement('base'); |
| baseElement.href = get_host_info().REMOTE_ORIGIN; |
| childDocument.head.append(baseElement); |
| |
| // Verify that changing the child's base url succeeded and did not affect |
| // the grandchild's base url. |
| const newChildBaseURL = childDocument.baseURI; |
| assert_equals(grandchildDocument.URL, 'about:srcdoc', |
| 'Grandchild document after child gets new base URL'); |
| assert_not_equals(newChildBaseURL, originalChildBaseURL, |
| 'Child base URL must change'); |
| assert_equals(grandchildDocument.baseURI, originalChildBaseURL, |
| 'Grandchild base URL must not change'); |
| }); |
| |
| done(); |
| }; |
| </script> |
| |
| <iframe srcdoc="<iframe></iframe><script>parent.start(document)</script>"> |
| </iframe> |
