Prerender: Add testcase for storage.persist

This CL adds tests for storage.persist() method, which is also expected to be deferred until prerender activation as well as storage.estimate(). Bug: 1321490 Change-Id: I8eca896804ce974b5040f8fdb831e5e9b94e2c19 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3810764 Commit-Queue: Yoshiki Tanioka <tanioka@google.com> Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org> Reviewed-by: Lingqi Chi <lingqi@chromium.org> Cr-Commit-Position: refs/heads/main@{#1031841}
chromium · Aug 5, 2022 · 0d93a3b · 0d93a3b
1 parent abe497e
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diff --git a/third_party/blink/web_tests/wpt_internal/prerender/resources/storage-persist.https.html b/third_party/blink/web_tests/wpt_internal/prerender/resources/storage-persist.https.html
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+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/speculation-rules/prerender/resources/utils.js"></script>
+<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
+<script>
+
+const params = new URLSearchParams(location.search);
+
+// The main test page (restriction-storage-persist.https.html) loads the
+// initiator page, then the initiator page will prerender itself with the
+// `prerendering` parameter.
+const isPrerendering = params.has('prerendering');
+
+if (!isPrerendering) {
+  loadInitiatorPage();
+} else {
+  const prerenderEventCollector = new PrerenderEventCollector();
+  prerenderEventCollector.start(
+      navigator.storage.persist(), 'navigator.storage.persist');
+}
+
+</script>
diff --git a/third_party/blink/web_tests/wpt_internal/prerender/restriction-storage-persist.https.html b/third_party/blink/web_tests/wpt_internal/prerender/restriction-storage-persist.https.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<title>Access to storage.persist() is deferred</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/speculation-rules/prerender/resources/utils.js"></script>
+<body>
+<script>
+
+promise_test(async t => {
+  const uid = token();
+  const bc = new PrerenderChannel('test-channel', uid);
+
+  const gotMessage = new Promise(resolve => {
+    bc.addEventListener('message', e => {
+      resolve(e.data);
+    }, {
+      once: true
+    });
+  });
+  const url = `resources/storage-persist.https.html?uid=${uid}`;
+  window.open(url, '_blank', 'noopener');
+
+  const result = await gotMessage;
+  const expected = [
+    {
+      event: 'started waiting navigator.storage.persist',
+      prerendering: true
+    },
+    {
+      event: 'prerendering change',
+      prerendering: false
+    },
+    {
+      event: 'finished waiting navigator.storage.persist',
+      prerendering: false
+    },
+  ];
+  assert_equals(result.length, expected.length);
+  for (let i = 0; i < result.length; i++) {
+    assert_equals(result[i].event, expected[i].event, `event[${i}]`);
+    assert_equals(result[i].prerendering, expected[i].prerendering,
+      `prerendering[${i}]`);
+  }
+  bc.close();
+
+  // Send a close signal to PrerenderEventCollector on the prerendered page.
+  new PrerenderChannel('close', uid).postMessage('');
+}, `the access to the storage.persist() should be deferred until the prerendered
+    page is activated`);
+
+</script>
+</body>