1 files changed, 78 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_expiration.js b/toolkit/components/thumbnails/test/browser_thumbnails_expiration.js
new file mode 100644
index 0000000000..4be93ebb16
--- /dev/null
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_expiration.js
@@ -0,0 +1,78 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const URL = "http://mochi.test:8888/?t=" + Date.now();
+const URL1 = URL + "#1";
+const URL2 = URL + "#2";
+const URL3 = URL + "#3";
+
+const EXPIRATION_MIN_CHUNK_SIZE = 50;
+const { PageThumbsExpiration } = ChromeUtils.importESModule(
+  "resource://gre/modules/PageThumbs.sys.mjs"
+);
+
+add_task(async function thumbnails_expiration() {
+  // Create dummy URLs.
+  let dummyURLs = [];
+  for (let i = 0; i < EXPIRATION_MIN_CHUNK_SIZE + 10; i++) {
+    dummyURLs.push(URL + "#dummy" + i);
+  }
+
+  // Make sure our thumbnails aren't expired too early.
+  dontExpireThumbnailURLs([URL1, URL2, URL3].concat(dummyURLs));
+
+  // Create three thumbnails.
+  await createDummyThumbnail(URL1);
+  ok(thumbnailExists(URL1), "first thumbnail created");
+
+  await createDummyThumbnail(URL2);
+  ok(thumbnailExists(URL2), "second thumbnail created");
+
+  await createDummyThumbnail(URL3);
+  ok(thumbnailExists(URL3), "third thumbnail created");
+
+  // Remove the third thumbnail.
+  await expireThumbnails([URL1, URL2]);
+  ok(thumbnailExists(URL1), "first thumbnail still exists");
+  ok(thumbnailExists(URL2), "second thumbnail still exists");
+  ok(!thumbnailExists(URL3), "third thumbnail has been removed");
+
+  // Remove the second thumbnail.
+  await expireThumbnails([URL1]);
+  ok(thumbnailExists(URL1), "first thumbnail still exists");
+  ok(!thumbnailExists(URL2), "second thumbnail has been removed");
+
+  // Remove all thumbnails.
+  await expireThumbnails([]);
+  ok(!thumbnailExists(URL1), "all thumbnails have been removed");
+
+  // Create some more files than the min chunk size.
+  for (let url of dummyURLs) {
+    await createDummyThumbnail(url);
+  }
+
+  ok(dummyURLs.every(thumbnailExists), "all dummy thumbnails created");
+
+  // Expire thumbnails and expect 10 remaining.
+  await expireThumbnails([]);
+  let remainingURLs = dummyURLs.filter(thumbnailExists);
+  is(remainingURLs.length, 10, "10 dummy thumbnails remaining");
+
+  // Expire thumbnails again. All should be gone by now.
+  await expireThumbnails([]);
+  remainingURLs = remainingURLs.filter(thumbnailExists);
+  is(remainingURLs.length, 0, "no dummy thumbnails remaining");
+});
+
+function createDummyThumbnail(aURL) {
+  info("Creating dummy thumbnail for " + aURL);
+  let dummy = new Uint8Array(10);
+  for (let i = 0; i < 10; ++i) {
+    dummy[i] = i;
+  }
+  return PageThumbsStorage.writeData(aURL, dummy);
+}
+
+function expireThumbnails(aKeep) {
+  return PageThumbsExpiration.expireThumbnails(aKeep);
+}