1 files changed, 38 insertions, 0 deletions
diff --git a/browser/components/preferences/tests/browser_newtab_menu.js b/browser/components/preferences/tests/browser_newtab_menu.js
new file mode 100644
index 0000000000..774c9dd756
--- /dev/null
+++ b/browser/components/preferences/tests/browser_newtab_menu.js
@@ -0,0 +1,38 @@
+add_task(async function newtabPreloaded() {
+  await openPreferencesViaOpenPreferencesAPI("paneHome", { leaveOpen: true });
+
+  const { contentDocument: doc, contentWindow } = gBrowser;
+  function dispatchMenuItemCommand(menuItem) {
+    const cmdEvent = doc.createEvent("xulcommandevent");
+    cmdEvent.initCommandEvent(
+      "command",
+      true,
+      true,
+      contentWindow,
+      0,
+      false,
+      false,
+      false,
+      false,
+      0,
+      null,
+      0
+    );
+    menuItem.dispatchEvent(cmdEvent);
+  }
+
+  const menuHome = doc.querySelector(`#newTabMode menuitem[value="0"]`);
+  const menuBlank = doc.querySelector(`#newTabMode menuitem[value="1"]`);
+  ok(menuHome.selected, "The first item, Home (default), is selected.");
+  ok(NewTabPagePreloading.enabled, "Default Home allows preloading.");
+
+  dispatchMenuItemCommand(menuBlank);
+  ok(menuBlank.selected, "The second item, Blank, is selected.");
+  ok(!NewTabPagePreloading.enabled, "Non-Home prevents preloading.");
+
+  dispatchMenuItemCommand(menuHome);
+  ok(menuHome.selected, "The first item, Home, is selected again.");
+  ok(NewTabPagePreloading.enabled, "Default Home allows preloading again.");
+
+  BrowserTestUtils.removeTab(gBrowser.selectedTab);
+});