1 files changed, 52 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_tabicon_after_bg_tab_crash.js b/browser/components/sessionstore/test/browser_tabicon_after_bg_tab_crash.js
new file mode 100644
index 0000000000..5eadca7a24
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_tabicon_after_bg_tab_crash.js
@@ -0,0 +1,52 @@
+"use strict";
+
+const FAVICON =
+  "data:image/gif;base64,R0lGODlhCwALAIAAAAAA3pn/ZiH5BAEAAAEALAAAAAALAAsAAAIUhA+hkcuO4lmNVindo7qyrIXiGBYAOw==";
+const PAGE_URL = `data:text/html,
+<html>
+  <head>
+    <link rel="shortcut icon" href="${FAVICON}">
+  </head>
+  <body>
+    Favicon!
+  </body>
+</html>`;
+
+/**
+ * Tests that if a background tab crashes that it doesn't
+ * lose the favicon in the tab.
+ */
+add_task(async function test_tabicon_after_bg_tab_crash() {
+  let originalTab = gBrowser.selectedTab;
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: PAGE_URL,
+    },
+    async function (browser) {
+      // Because there is debounce logic in ContentLinkHandler.jsm to reduce the
+      // favicon loads, we have to wait some time before checking that icon was
+      // stored properly.
+      await BrowserTestUtils.waitForCondition(
+        () => {
+          return gBrowser.getIcon() != null;
+        },
+        "wait for favicon load to finish",
+        100,
+        5
+      );
+      Assert.equal(browser.mIconURL, FAVICON, "Favicon is correctly set.");
+      await BrowserTestUtils.switchTab(gBrowser, originalTab);
+      await BrowserTestUtils.crashFrame(
+        browser,
+        false /* shouldShowTabCrashPage */
+      );
+      Assert.equal(
+        browser.mIconURL,
+        FAVICON,
+        "Favicon is still set after crash."
+      );
+    }
+  );
+});