1 files changed, 38 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_bg_crash_while_idle.js b/toolkit/components/thumbnails/test/browser_thumbnails_bg_crash_while_idle.js
new file mode 100644
index 000000000..8ff6a3509
--- /dev/null
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_bg_crash_while_idle.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function* runTests() {
+  let crashObserver = bgAddCrashObserver();
+
+  // make a good capture first - this ensures we have the <browser>
+  let goodUrl = bgTestPageURL();
+  yield bgCapture(goodUrl);
+  ok(thumbnailExists(goodUrl), "Thumbnail should be cached after capture");
+  removeThumbnail(goodUrl);
+
+  // inject our content script.
+  let mm = bgInjectCrashContentScript();
+
+  // the observer for the crashing process is basically async, so it's hard
+  // to know when the <browser> has actually seen it.  Easist is to just add
+  // our own observer.
+  Services.obs.addObserver(function onCrash() {
+    Services.obs.removeObserver(onCrash, "oop-frameloader-crashed");
+    // spin the event loop to ensure the BPT observer was called.
+    executeSoon(function() {
+      // Now queue another capture and ensure it recovers.
+      bgCapture(goodUrl, { onDone: () => {
+        ok(thumbnailExists(goodUrl), "We should have recovered and handled new capture requests");
+        removeThumbnail(goodUrl);
+        // Test done.
+        ok(crashObserver.crashed, "Saw a crash from this test");
+        next();
+      }});
+    });
+  }, "oop-frameloader-crashed", false);
+
+  // Nothing is pending - crash the process.
+  info("Crashing the thumbnail content process.");
+  mm.sendAsyncMessage("thumbnails-test:crash");
+  yield true;
+}