diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/addons/private-browsing-supported/test-window-tabs.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/addons/private-browsing-supported/test-window-tabs.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,85 @@
+'use strict';
+
+const tabs = require('sdk/tabs');
+const { isPrivate } = require('sdk/private-browsing');
+const { getOwnerWindow } = require('sdk/private-browsing/window/utils');
+const { promise: windowPromise, close, focus } = require('sdk/window/helpers');
+const { getMostRecentBrowserWindow } = require('sdk/window/utils');
+
+exports.testOpenTabWithPrivateActiveWindowNoIsPrivateOption = function(assert, done) {
+  let window = getMostRecentBrowserWindow().OpenBrowserWindow({ private: true });
+
+  windowPromise(window, 'load').then(focus).then(function (window) {
+    assert.ok(isPrivate(window), 'new window is private');
+
+    tabs.open({
+      url: 'about:blank',
+      onOpen: function(tab) {
+        assert.ok(isPrivate(tab), 'new tab is private');
+        assert.ok(isPrivate(getOwnerWindow(tab)), 'new tab window is private');
+        assert.strictEqual(getOwnerWindow(tab), window, 'the tab window and the private window are the same');
+
+        close(window).then(done).then(null, assert.fail);
+      }
+    })
+  }).then(null, assert.fail);
+}
+
+exports.testOpenTabWithNonPrivateActiveWindowNoIsPrivateOption = function(assert, done) {
+  let window = getMostRecentBrowserWindow().OpenBrowserWindow({ private: false });
+
+  windowPromise(window, 'load').then(focus).then(function (window) {
+    assert.equal(isPrivate(window), false, 'new window is not private');
+
+    tabs.open({
+      url: 'about:blank',
+      onOpen: function(tab) {
+        assert.equal(isPrivate(tab), false, 'new tab is not private');
+        assert.equal(isPrivate(getOwnerWindow(tab)), false, 'new tab window is not private');
+        assert.strictEqual(getOwnerWindow(tab), window, 'the tab window and the new window are the same');
+
+        close(window).then(done).then(null, assert.fail);
+      }
+    })
+  }).then(null, assert.fail);
+}
+
+exports.testOpenTabWithPrivateActiveWindowWithIsPrivateOptionTrue = function(assert, done) {
+  let window = getMostRecentBrowserWindow().OpenBrowserWindow({ private: true });
+
+  windowPromise(window, 'load').then(focus).then(function (window) {
+    assert.ok(isPrivate(window), 'new window is private');
+
+    tabs.open({
+      url: 'about:blank',
+      isPrivate: true,
+      onOpen: function(tab) {
+        assert.ok(isPrivate(tab), 'new tab is private');
+        assert.ok(isPrivate(getOwnerWindow(tab)), 'new tab window is private');
+        assert.strictEqual(getOwnerWindow(tab), window, 'the tab window and the private window are the same');
+
+        close(window).then(done).then(null, assert.fail);
+      }
+    })
+  }).then(null, assert.fail);
+}
+
+exports.testOpenTabWithNonPrivateActiveWindowWithIsPrivateOptionFalse = function(assert, done) {
+  let window = getMostRecentBrowserWindow().OpenBrowserWindow({ private: false });
+
+  windowPromise(window, 'load').then(focus).then(function (window) {
+    assert.equal(isPrivate(window), false, 'new window is not private');
+
+    tabs.open({
+      url: 'about:blank',
+      isPrivate: false,
+      onOpen: function(tab) {
+        assert.equal(isPrivate(tab), false, 'new tab is not private');
+        assert.equal(isPrivate(getOwnerWindow(tab)), false, 'new tab window is not private');
+        assert.strictEqual(getOwnerWindow(tab), window, 'the tab window and the new window are the same');
+
+        close(window).then(done).then(null, assert.fail);
+      }
+    })
+  }).then(null, assert.fail);
+}