1 files changed, 42 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_redirect.js b/toolkit/components/thumbnails/test/browser_thumbnails_redirect.js
new file mode 100644
index 0000000000..b77b4011c3
--- /dev/null
+++ b/toolkit/components/thumbnails/test/browser_thumbnails_redirect.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const URL =
+  "http://mochi.test:8888/browser/toolkit/components/thumbnails/" +
+  "test/background_red_redirect.sjs";
+// loading URL will redirect us to...
+const FINAL_URL =
+  "http://mochi.test:8888/browser/toolkit/components/" +
+  "thumbnails/test/background_red.html";
+
+/**
+ * These tests ensure that we save and provide thumbnails for redirecting sites.
+ */
+add_task(async function thumbnails_redirect() {
+  dontExpireThumbnailURLs([URL, FINAL_URL]);
+
+  // Kick off history by loading a tab first or the test fails in single mode.
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: URL,
+    },
+    browser => {}
+  );
+
+  // Create a tab, redirecting to a page with a red background.
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: URL,
+    },
+    async browser => {
+      await captureAndCheckColor(255, 0, 0, "we have a red thumbnail");
+
+      // Wait until the referrer's thumbnail's file has been written.
+      await whenFileExists(URL);
+      let [r, g, b] = await retrieveImageDataForURL(URL);
+      is("" + [r, g, b], "255,0,0", "referrer has a red thumbnail");
+    }
+  );
+});