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| 1 | +<!doctype html> |
| 2 | +<html> |
| 3 | + |
| 4 | +<head> |
| 5 | + <script src="/resources/testharness.js"></script> |
| 6 | + <script src="/resources/testharnessreport.js"></script> |
| 7 | + <script src="/common/utils.js"></script> |
| 8 | + <script src="/common/dispatcher/dispatcher.js"></script> |
| 9 | + <script src="/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js"></script> |
| 10 | +</head> |
| 11 | + |
| 12 | +<body> |
| 13 | + <script> |
| 14 | + const BackForwardCacheRestorationName = ''; |
| 15 | + const BackForwardCacheRestorationType = 'back-forward-cache-restoration'; |
| 16 | + |
| 17 | + let getNavigationId = (i) => { |
| 18 | + let identifier = 'mark' + i; |
| 19 | + performance.mark(identifier); |
| 20 | + return window.performance.getEntriesByName(identifier)[0].navigationId; |
| 21 | + } |
| 22 | + |
| 23 | + let getNumberofBackForwardCacheRestorationEntries = (BackForwardCacheRestorationType) => { |
| 24 | + return window.performance.getEntriesByType(BackForwardCacheRestorationType).length; |
| 25 | + } |
| 26 | + |
| 27 | + let getBackForwardCacheRestorationByType = (BackForwardCacheRestorationType) => { |
| 28 | + let entries = window.performance.getEntriesByType(BackForwardCacheRestorationType); |
| 29 | + return entries[entries.length - 1]; |
| 30 | + } |
| 31 | + |
| 32 | + let getBackForwardCacheRestorationByGetAllAndFilter = (BackForwardCacheRestorationType) => { |
| 33 | + let entries = window.performance.getEntries().filter(e => e.entryType == BackForwardCacheRestorationType); |
| 34 | + return entries[entries.length - 1]; |
| 35 | + } |
| 36 | + |
| 37 | + let getBackForwardCacheRestorationByPerformanceObserverBuffered = async (BackForwardCacheRestorationType) => { |
| 38 | + let p = new Promise(resolve => { |
| 39 | + new PerformanceObserver((list) => { |
| 40 | + const entries = list.getEntries().filter(e => e.entryType == BackForwardCacheRestorationType); |
| 41 | + if (entries.length > 0) { |
| 42 | + resolve(entries[entries.length - 1]); |
| 43 | + } |
| 44 | + }).observe({ type: BackForwardCacheRestorationType, buffered: true }); |
| 45 | + }); |
| 46 | + return await p; |
| 47 | + } |
| 48 | + |
| 49 | + let checkEntry = (entry, previousNavigationId) => { |
| 50 | + assert_equals(entry.name, BackForwardCacheRestorationName); |
| 51 | + assert_equals(entry.entryType, BackForwardCacheRestorationType); |
| 52 | + assert_not_equals(entry.navigationId, previousNavigationId); |
| 53 | + assert_true(entry.pageshowEventStart > entry.startTime); |
| 54 | + assert_true(entry.pageshowEventEnd >= entry.pageshowEventStart); |
| 55 | + } |
| 56 | + |
| 57 | + promise_test(async t => { |
| 58 | + const pageA = new RemoteContext(token()); |
| 59 | + const pageB = new RemoteContext(token()); |
| 60 | + |
| 61 | + const urlA = executorPath + pageA.context_id; |
| 62 | + const urlB = originCrossSite + executorPath + pageB.context_id; |
| 63 | + // Open url A. |
| 64 | + window.open(urlA, '_blank', 'noopener'); |
| 65 | + await pageA.execute_script(waitForPageShow); |
| 66 | + |
| 67 | + // Assert no instance of BackForwardCacheRestoration exists without back forward cache navigatoin. |
| 68 | + let size = await pageA.execute_script(getNumberofBackForwardCacheRestorationEntries); |
| 69 | + assert_equals(0, size); |
| 70 | + |
| 71 | + let entry; |
| 72 | + for (i = 0; i < 2; i++) { |
| 73 | + let curr_nav_id = await pageA.execute_script(getNavigationId, [i]); |
| 74 | + |
| 75 | + // Navigate away to url B and back. |
| 76 | + await navigateAndThenBack(pageA, pageB, urlB); |
| 77 | + |
| 78 | + // Assert Performance Observer API supports BackForwardCacheRestoration. |
| 79 | + entry = await pageA.execute_script(getBackForwardCacheRestorationByPerformanceObserverBuffered, [BackForwardCacheRestorationType]); |
| 80 | + // The navigation id after a bfcache restoration should be different |
| 81 | + // from that before. |
| 82 | + checkEntry(entry, curr_nav_id); |
| 83 | + |
| 84 | + // Assert Performance Timeline API supports BackForwardCacheRestoration. |
| 85 | + entry = await pageA.execute_script(getBackForwardCacheRestorationByType, [BackForwardCacheRestorationType]); |
| 86 | + checkEntry(entry, curr_nav_id); |
| 87 | + |
| 88 | + entry = await pageA.execute_script(getBackForwardCacheRestorationByGetAllAndFilter, [BackForwardCacheRestorationType]); |
| 89 | + checkEntry(entry, curr_nav_id); |
| 90 | + } |
| 91 | + }, 'Performance API for the back forward cache restoration entry.'); |
| 92 | + </script> |
| 93 | +</body> |
| 94 | + |
| 95 | +</html> |
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