1 files changed, 55 insertions, 0 deletions
diff --git a/common/Test.js b/common/Test.js
new file mode 100644
index 0000000..e272d1e
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+++ b/common/Test.js
@@ -0,0 +1,55 @@
+/**
+* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
+*
+* Copyright (C) 2018 Giorgio Maone <giorgio@maone.net>
+*
+* This file is part of GNU LibreJS.
+*
+* GNU LibreJS is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* GNU LibreJS is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with GNU LibreJS.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+"use strict";
+var Test = (() => {
+  const RUNNER_URL = browser.extension.getURL("/test/SpecRunner.html");
+  return {
+    /*
+      returns RUNNER_URL if it's a test-enabled build or an about:debugging
+      temporary extension session, null otherwise
+    */
+    async getURL() {
+      let url = RUNNER_URL;
+      try {
+        await fetch(url);
+      } catch (e) {
+        url = null;
+      }
+      this.getURL = () => url;
+      return url;
+    },
+
+    async getTab(activate = false) {
+      let url = await this.getURL();
+      let tab = url ? (await browser.tabs.query({url}))[0] ||
+                    (await browser.tabs.create({url}))
+        : null;
+      if (tab && activate) {
+        await browser.tabs.update(tab.id, {active: true});
+      }
+      return tab;
+    }
+  };
+})();
+if (typeof module === "object") {
+  module.exports = Test;
+}