prefetch-traverse-reload.sub.html

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This WPT test may be referenced by the following Test IDs:
- /speculation-rules/prefetch/prefetch-traverse-reload.sub.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta name="timeout" content="long">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/dispatcher/dispatcher.js"></script>

<script src="/common/utils.js"></script>

<script src="/websockets/constants.sub.js"></script>

<script src="../resources/utils.js"></script>

<script src="resources/utils.sub.js"></script>

<script>

setup(() => assertSpeculationRulesIsSupported());

promise_test(async t => {

  let agent = await spawnWindow(t, { protocol: 'https', pipe: 'header(Cache-Control, no-store)' });

  let previousUrl = await agent.execute_script(() => location.href);

  await agent.execute_script(async () => {

    window.preventBfcache = new WebSocket('wss://{{ports[wss][0]}}/echo');

});

  let nextUrl = agent.getExecutorURL({ protocol: 'https', page: 2 });

  await agent.navigate(nextUrl);

  await agent.forceSinglePrefetch(previousUrl);

  await agent.execute_script(() => {

    window.executor.suspend(() => history.go(-1));

});

  assert_equals(previousUrl, await agent.execute_script(() => location.href));

  assert_prefetched(await agent.getRequestHeaders(), "traversal should use prefetch");

}, "prefetches can be used for traversal navigations");

promise_test(async t => {

  let agent = await spawnWindow(t, { protocol: 'https', pipe: 'header(Cache-Control, no-store)' });

  let previousUrl = await agent.execute_script(() => location.href);

  await agent.execute_script(async () => {

    window.preventBfcache = new WebSocket('wss://{{ports[wss][0]}}/echo');

});

  let nextUrl = agent.getExecutorURL({ protocol: 'https', page: 2 });

  await agent.navigate(nextUrl);

  await agent.forceSinglePrefetch(previousUrl);

  // In https://html.spec.whatwg.org/multipage/nav-history-apis.html#delta-traverse,

  // `sourceDocument` is `History`'s relevant global object's associated

  // Document. In this case, it's `iframe.contentDocument`, and thus the

  // prefetch from `win`'s Document (iframe's parent Document) isn't used.

  await agent.execute_script(() => {

    window.executor.suspend(() => {

      const iframe = document.createElement('iframe');

      document.body.appendChild(iframe);

      iframe.contentWindow.history.go(-1);

});

});

  assert_equals(previousUrl, await agent.execute_script(() => location.href));

  assert_not_prefetched(await agent.getRequestHeaders(),

      "prefetch from different Document should not be used");

}, "History's Document is used for traversal navigations");

promise_test(async t => {

  let agent = await spawnWindow(t, { protocol: 'https', pipe: 'header(Cache-Control, no-store)' });

  let previousUrl = await agent.execute_script(() => location.href);

  await agent.forceSinglePrefetch(previousUrl);

  await agent.execute_script(() => {

    window.executor.suspend(() => location.reload());

});

  assert_equals(previousUrl, await agent.execute_script(() => location.href));

  assert_prefetched(await agent.getRequestHeaders(), "reload should use prefetch");

}, "prefetches can be used for reload navigations");

</script>