1 files changed, 38 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_bg_queueing.js b/toolkit/components/thumbnails/test/browser_thumbnails_bg_queueing.js
new file mode 100644
index 000000000..1426f6f4e
--- /dev/null
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_bg_queueing.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function* runTests() {
+  let urls = [
+    "http://www.example.com/0",
+    "http://www.example.com/1",
+    // an item that will timeout to ensure timeouts work and we resume.
+    bgTestPageURL({ wait: 2002 }),
+    "http://www.example.com/2",
+  ];
+  dontExpireThumbnailURLs(urls);
+  urls.forEach(url => {
+    ok(!thumbnailExists(url), "Thumbnail should not exist yet: " + url);
+    let isTimeoutTest = url.indexOf("wait") >= 0;
+    BackgroundPageThumbs.capture(url, {
+      timeout: isTimeoutTest ? 100 : 30000,
+      onDone: function onDone(capturedURL) {
+        ok(urls.length > 0, "onDone called, so URLs should still remain");
+        is(capturedURL, urls.shift(),
+           "Captured URL should be currently expected URL (i.e., " +
+           "capture() callbacks should be called in the correct order)");
+        if (isTimeoutTest) {
+          ok(!thumbnailExists(capturedURL),
+             "Thumbnail shouldn't exist for timed out capture");
+        } else {
+          ok(thumbnailExists(capturedURL),
+             "Thumbnail should be cached after capture");
+          removeThumbnail(url);
+        }
+        if (!urls.length)
+          // Test done.
+          next();
+      },
+    });
+  });
+  yield true;
+}