1 files changed, 24 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_bg_bad_url.js b/toolkit/components/thumbnails/test/browser_thumbnails_bg_bad_url.js
new file mode 100644
index 0000000000..7ebb843cd3
--- /dev/null
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_bg_bad_url.js
@@ -0,0 +1,24 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async function thumbnails_bg_bad_url() {
+  let url = "invalid-protocol://ffggfsdfsdf/";
+  ok(!thumbnailExists(url), "Thumbnail should not be cached already.");
+  let numCalls = 0;
+  let observer = bgAddPageThumbObserver(url);
+  await new Promise(resolve => {
+    BackgroundPageThumbs.capture(url, {
+      onDone: function onDone(capturedURL) {
+        is(capturedURL, url, "Captured URL should be URL passed to capture");
+        is(numCalls++, 0, "onDone should be called only once");
+        ok(
+          !thumbnailExists(url),
+          "Capture failed so thumbnail should not be cached"
+        );
+        resolve();
+      },
+    });
+  });
+
+  await Assert.rejects(observer, /page-thumbnail:error/);
+});