Infer a speculation rule's source from the other keys.

This is behind a RuntimeEnabledFeature, so we can enable it once we're convinced it's reasonable, and disable it remotely if anything surprising happens. Bug: 1517696 Change-Id: Ie41529a13ab48671fc19c30003471e61fcc00781 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5186903 Reviewed-by: Kevin McNee <mcnee@chromium.org> Auto-Submit: Jeremy Roman <jbroman@chromium.org> Commit-Queue: Jeremy Roman <jbroman@chromium.org> Cr-Commit-Position: refs/heads/main@{#1246177}
web-platform-tests · Jan 12, 2024 · 9344126 · 9344126
1 parent 40b49b7
commit 9344126
Showing 1 changed file with 34 additions and 0 deletions.
diff --git a/speculation-rules/prefetch/implicit-source.https.html b/speculation-rules/prefetch/implicit-source.https.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<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="../resources/utils.js"></script>
+<script src="resources/utils.sub.js"></script>
+<body>
+<script>
+  setup(() => assertSpeculationRulesIsSupported());
+
+  promise_test(async t => {
+    let urls = getPrefetchUrlList(2);
+
+    let a = document.createElement('a');
+    a.className = 'prefetch-me';
+    a.href = urls[1];
+    a.textContent = 'prefetch me!';
+    document.body.appendChild(a);
+    t.add_cleanup(() => a.remove());
+
+    insertSpeculationRules({prefetch: [
+      {urls: [urls[0]]},
+      {where: {selector_matches: '.prefetch-me'}, eagerness: 'immediate'},
+    ]});
+
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    let wasPrefetched = urls.map(isUrlPrefetched);
+    assert_true(!!(await wasPrefetched[0]), 'implicit list rule should have worked');
+    assert_true(!!(await wasPrefetched[1]), 'implicit document rule should have worked');
+  }, 'rules should be accepted without an explicit source');
+</script>
+</body>