Add m-esr52 at 52.6.0

1 files changed, 24 insertions, 0 deletions

diff --git a/addon-sdk/source/test/tabs/utils.js b/addon-sdk/source/test/tabs/utils.js
new file mode 100644
index 000000000..4981a4d08
--- /dev/null
+++ b/addon-sdk/source/test/tabs/utils.js
@@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { openTab: makeTab, getTabContentWindow } = require("sdk/tabs/utils");
+
+function openTab(rawWindow, url) {
+  return new Promise(resolve => {
+    let tab = makeTab(rawWindow, url);
+    let window = getTabContentWindow(tab);
+    if (window.document.readyState == "complete") {
+      return resolve();
+    }
+
+    window.addEventListener("load", function onLoad() {
+      window.removeEventListener("load", onLoad, true);
+      resolve();
+    }, true);
+
+    return null;
+  })
+}
+exports.openTab = openTab;