speculation-rules/prerender/no-vary-search-hint.https.html

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<script>
setup(() => assertSpeculationRulesIsSupported());

function prerender_no_vary_search_test(description, noVarySearch, noVarySearchHint, prefetchQuery, navigateQuery, shouldUse) {
  promise_test(async t => {
    const prefetchQueryParams = new URLSearchParams(prefetchQuery);
    const navigateQueryParams = new URLSearchParams(navigateQuery);

    addNoVarySearchHeaderUsingPipe(prefetchQueryParams, noVarySearch);
    addNoVarySearchHeaderUsingPipe(navigateQueryParams, noVarySearch);

    const params = {
      'prerendering': prefetchQueryParams,
      'activating': navigateQueryParams
    };

    const rule_extras = {
      'expects_no_vary_search': noVarySearchHint
    };

    // TODO(crbug.com/343754418): Block serving a response to prerendering
    // request until `tryToActivate` processes the No-Vary-Search hint and
    // starts waiting for the response. See prefetch-single-with-hint.https.html
    // and prefetch_nvs_hint.py. Without that, the No-Vary-Search header may
    // arrive before the hint is processed. The case is not what this test want
    // to confirm.
    const {tryToActivate, getNetworkRequestCount} =
        await create_prerendered_page(t, params, undefined, rule_extras);

    if (shouldUse) {
      // The request should be sent only one time for prerendering.
      assert_equals(await tryToActivate(), 'activated');
      assert_equals(await getNetworkRequestCount(), '1');
    } else {
      // The request should be sent twice for prerendering and real navigation
      // that doesn't activate the prerendered page.
      assert_equals(await tryToActivate(), 'discarded');
      assert_equals(await getNetworkRequestCount(), '2');
    }
  }, description);
}

hint_test_inputs.forEach(({description, noVarySearch, noVarySearchHint, prefetchQuery, navigateQuery, shouldUse}) => {
  subsetTest(prerender_no_vary_search_test, description, noVarySearch, prefetchQuery, navigateQuery, shouldUse);
});
</script>