<!DOCTYPE html>
<meta name=help href="https://privacycg.github.io/storage-partitioning/">
<title>Partitioned estimate() usage details for indexeddb test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="./helpers.js"></script>
<script src="../IndexedDB/resources/support-promises.js"></script>

<body>
  <script>
    const usageDetails = async () =>
      (await navigator.storage.estimate()).usageDetails.indexedDB || 0;

    const createSomeUsage = async (test) => {
      // We use 100KB here because db compaction usually happens every few MB
      // 100KB is large enough to avoid a false positive (small amounts of
      // metadata getting written for some random reason), and small enough to
      // avoid compaction with a reasonably high probability.
      const write_size = 1024 * 100;
      const object_store_name = token();
      const db_name = self.location.pathname;

      await indexedDB.deleteDatabase(db_name);
      const db = await createDB(db_name, object_store_name, test);
      const transaction = db.transaction(object_store_name, 'readwrite');
      const value_to_store = largeValue(write_size, Math.random() * 255);
      transaction.objectStore(object_store_name).add(value_to_store, 1);

      await transactionPromise(transaction);
      return db;
    }

    const testPath = () => location.pathname.split("/").slice(0, -1).join("/");

    let alt_origin = "https://{{hosts[alt][]}}:{{ports[https][0]}}";
    let details = {};

    const iframe = document.createElement("iframe");
    iframe.src = `https://{{host}}:{{ports[https][0]}}${testPath()}/resources` +
      `/partitioned-estimate-usage-details-indexeddb-helper-frame.html`;
    document.body.appendChild(iframe);

    async_test(test => {
      if (location.origin === alt_origin)
        return;

      let db;
      window.addEventListener("message", test.step_func(async event => {
        if (event.data === "iframe-is-ready") {
          details.init = await usageDetails();
          db = await createSomeUsage(test);
          details.after = await usageDetails();
          assert_greater_than(details.after, details.init);

          iframe.contentWindow.postMessage("get-details", iframe.origin);
        }
      }));

      window.addEventListener("message", test.step_func(event => {
        if (event.data.source === "same-site") {
          details.same_site = event.data;

          const cross_site_window = window
            .open(`${alt_origin}${location.pathname}`, "", "noopener=false");
          test.add_cleanup(() => cross_site_window.close());
        }
        if (event.data.source === "cross-site") {
          details.cross_site = event.data;

          // Some cleanup
          test.step(async () => await db.close());

          test.step(() => {
            assert_true(details.cross_site.init == 0, "Usage should be 0.");
            assert_equals(details.same_site.init, details.after);
          });

          test.done();
        }
      }));
    }, "Partitioned estimate() usage details for indexeddb test.");
  </script>
</body>
