1 files changed, 40 insertions, 0 deletions
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js b/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js
new file mode 100644
index 000000000..8e8b5e0b0
--- /dev/null
+++ b/toolkit/components/webextensions/test/xpcshell/test_ext_background_private_browsing.js
@@ -0,0 +1,40 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+Cu.import("resource://gre/modules/Preferences.jsm");
+
+function* testBackgroundPage(expected) {
+  let extension = ExtensionTestUtils.loadExtension({
+    async background() {
+      browser.test.assertEq(window, browser.extension.getBackgroundPage(),
+                            "Caller should be able to access itself as a background page");
+      browser.test.assertEq(window, await browser.runtime.getBackgroundPage(),
+                            "Caller should be able to access itself as a background page");
+
+      browser.test.sendMessage("incognito", browser.extension.inIncognitoContext);
+    },
+  });
+
+  yield extension.startup();
+
+  let incognito = yield extension.awaitMessage("incognito");
+  equal(incognito, expected.incognito, "Expected incognito value");
+
+  yield extension.unload();
+}
+
+add_task(function* test_background_incognito() {
+  do_print("Test background page incognito value with permanent private browsing disabled");
+
+  yield testBackgroundPage({incognito: false});
+
+  do_print("Test background page incognito value with permanent private browsing enabled");
+
+  Preferences.set("browser.privatebrowsing.autostart", true);
+  do_register_cleanup(() => {
+    Preferences.reset("browser.privatebrowsing.autostart");
+  });
+
+  yield testBackgroundPage({incognito: true});
+});