1 files changed, 51 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug817947.js b/browser/base/content/test/general/browser_bug817947.js
new file mode 100644
index 0000000000..eba54aea5b
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug817947.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const URL = "http://mochi.test:8888/browser/";
+const PREF = "browser.sessionstore.restore_on_demand";
+
+add_task(async () => {
+  Services.prefs.setBoolPref(PREF, true);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref(PREF);
+  });
+
+  let tab = await preparePendingTab();
+
+  let deferredTab = PromiseUtils.defer();
+
+  let win = gBrowser.replaceTabWithWindow(tab);
+  win.addEventListener(
+    "before-initial-tab-adopted",
+    async () => {
+      let [newTab] = win.gBrowser.tabs;
+      await BrowserTestUtils.browserLoaded(newTab.linkedBrowser);
+      deferredTab.resolve(newTab);
+    },
+    { once: true }
+  );
+
+  let newTab = await deferredTab.promise;
+  is(newTab.linkedBrowser.currentURI.spec, URL, "correct url should be loaded");
+  ok(!newTab.hasAttribute("pending"), "tab should not be pending");
+
+  win.close();
+});
+
+async function preparePendingTab(aCallback) {
+  let tab = BrowserTestUtils.addTab(gBrowser, URL);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  let sessionUpdatePromise = BrowserTestUtils.waitForSessionStoreUpdate(tab);
+  BrowserTestUtils.removeTab(tab);
+  await sessionUpdatePromise;
+
+  let [{ state }] = SessionStore.getClosedTabDataForWindow(window);
+
+  tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  SessionStore.setTabState(tab, JSON.stringify(state));
+  ok(tab.hasAttribute("pending"), "tab should be pending");
+
+  return tab;
+}