1 files changed, 59 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_revive_crashed_bg_tabs.js b/browser/components/sessionstore/test/browser_revive_crashed_bg_tabs.js
new file mode 100644
index 0000000000..86f85503d3
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_revive_crashed_bg_tabs.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that even if the user has set their tabs to restore
+ * immediately on session start, that background tabs after a
+ * content process crash restore on demand.
+ */
+
+"use strict";
+
+const PAGE_1 =
+  "data:text/html,<html><body>A%20regular,%20everyday,%20normal%20page.";
+const PAGE_2 =
+  "data:text/html,<html><body>Another%20regular,%20everyday,%20normal%20page.";
+
+add_setup(async function () {
+  await pushPrefs(
+    ["dom.ipc.processCount", 1],
+    ["browser.sessionstore.restore_on_demand", false]
+  );
+});
+
+add_task(async function test_revive_bg_tabs_on_demand() {
+  let newTab1 = BrowserTestUtils.addTab(gBrowser, PAGE_1);
+  let browser1 = newTab1.linkedBrowser;
+  await BrowserTestUtils.browserLoaded(browser1);
+
+  gBrowser.selectedTab = newTab1;
+
+  let newTab2 = BrowserTestUtils.addTab(gBrowser, PAGE_2);
+  let browser2 = newTab2.linkedBrowser;
+  await BrowserTestUtils.browserLoaded(browser2);
+
+  await TabStateFlusher.flush(browser2);
+
+  // Now crash the selected tab
+  let windowReady = BrowserTestUtils.waitForEvent(window, "SSWindowStateReady");
+  await BrowserTestUtils.crashFrame(browser1);
+
+  ok(newTab1.hasAttribute("crashed"), "Selected tab should be crashed");
+  ok(!newTab2.hasAttribute("crashed"), "Background tab should not be crashed");
+
+  // Wait until we've had a chance to restore all tabs immediately
+  await windowReady;
+
+  // But we should not have restored the background tab
+  ok(newTab2.hasAttribute("pending"), "Background tab should be pending");
+
+  // Now select newTab2 to make sure it restores.
+  let newTab2Restored = promiseTabRestored(newTab2);
+  gBrowser.selectedTab = newTab2;
+  await newTab2Restored;
+
+  ok(browser2.isRemoteBrowser, "Restored browser should be remote");
+
+  BrowserTestUtils.removeTab(newTab1);
+  BrowserTestUtils.removeTab(newTab2);
+});