1 files changed, 48 insertions, 0 deletions
diff --git a/toolkit/components/places/tests/favicons/test_incremental_vacuum.js b/toolkit/components/places/tests/favicons/test_incremental_vacuum.js
new file mode 100644
index 0000000000..ab93121d47
--- /dev/null
+++ b/toolkit/components/places/tests/favicons/test_incremental_vacuum.js
@@ -0,0 +1,48 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests incremental vacuum of the favicons database.
+
+const { PlacesDBUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/PlacesDBUtils.sys.mjs"
+);
+
+add_task(async function () {
+  let icon = {
+    file: do_get_file("noise.png"),
+    mimetype: "image/png",
+  };
+
+  let url = "http://foo.bar/";
+  await PlacesTestUtils.addVisits(url);
+  for (let i = 0; i < 10; ++i) {
+    let iconUri = NetUtil.newURI("http://mozilla.org/" + i);
+    let data = readFileData(icon.file);
+    PlacesUtils.favicons.replaceFaviconData(iconUri, data, icon.mimetype);
+    await setFaviconForPage(url, iconUri);
+  }
+
+  let promise = TestUtils.topicObserved("places-favicons-expired");
+  PlacesUtils.favicons.expireAllFavicons();
+  await promise;
+
+  let db = await PlacesUtils.promiseDBConnection();
+  let state = (
+    await db.execute("PRAGMA favicons.auto_vacuum")
+  )[0].getResultByIndex(0);
+  Assert.equal(state, 2, "auto_vacuum should be incremental");
+  let count = (
+    await db.execute("PRAGMA favicons.freelist_count")
+  )[0].getResultByIndex(0);
+  info(`Found ${count} freelist pages`);
+  let log = await PlacesDBUtils.incrementalVacuum();
+  info(log);
+  let newCount = (
+    await db.execute("PRAGMA favicons.freelist_count")
+  )[0].getResultByIndex(0);
+  info(`Found ${newCount} freelist pages`);
+  Assert.ok(
+    newCount < count,
+    "The number of freelist pages should have reduced"
+  );
+});