import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

addon-sdk/source/test/addons/simple-prefs-l10n/locale/en.properties

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+# 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/.
+
+somePreference_title=A

addon-sdk/source/test/addons/simple-prefs-l10n/main.js

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+/* 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 { Cu } = require('chrome');
+const sp = require('sdk/simple-prefs');
+const app = require('sdk/system/xul-app');
+const self = require('sdk/self');
+const tabs = require('sdk/tabs');
+const { preferencesBranch } = require('sdk/self');
+
+const { AddonManager } = Cu.import('resource://gre/modules/AddonManager.jsm', {});
+
+// Once Bug 903018 is resolved, just move the application testing to
+// module.metadata.engines
+//
+// This should work in Fennec, needs to be refactored to work, via bug 979645
+if (app.is('Firefox')) {
+  exports.testAOMLocalization = function(assert, done) {
+      tabs.open({
+        url: 'about:addons',
+        onReady: function(tab) {
+          tab.attach({
+            contentScriptWhen: 'end',
+            contentScript: 'function onLoad() {\n' +
+                             'unsafeWindow.removeEventListener("load", onLoad, false);\n' +
+                             'AddonManager.getAddonByID("' + self.id + '", function(aAddon) {\n' +
+                               'unsafeWindow.gViewController.viewObjects.detail.node.addEventListener("ViewChanged", function whenViewChanges() {\n' +
+                                 'unsafeWindow.gViewController.viewObjects.detail.node.removeEventListener("ViewChanged", whenViewChanges, false);\n' +
+                                 'setTimeout(function() {\n' + // TODO: figure out why this is necessary..
+                                     'self.postMessage({\n' +
+                                       'somePreference: getAttributes(unsafeWindow.document.querySelector("setting[data-jetpack-id=\'' + self.id + '\']"))\n' +
+                                     '});\n' +
+                                 '}, 250);\n' +
+                               '}, false);\n' +
+                               'unsafeWindow.gViewController.commands.cmd_showItemDetails.doCommand(aAddon, true);\n' +
+                             '});\n' +
+                             'function getAttributes(ele) {\n' +
+                               'if (!ele) return {};\n' +
+                               'return {\n' +
+                                 'title: ele.getAttribute("title")\n' +
+                               '}\n' +
+                             '}\n' +
+                           '}\n' +
+                           // Wait for the load event ?
+                           'if (document.readyState == "complete") {\n' +
+                             'onLoad()\n' +
+                           '} else {\n' +
+                             'unsafeWindow.addEventListener("load", onLoad, false);\n' +
+                           '}\n',
+            onMessage: function(msg) {
+              // test somePreference
+              assert.equal(msg.somePreference.title, 'A', 'somePreference title is correct');
+              tab.close(done);
+            }
+          });
+        }
+      });
+  }
+} else {
+  exports['test unsupported'] = (assert) => assert.pass('This test is unsupported.');
+}
+
+require('sdk/test/runner').runTestsFromModule(module);

addon-sdk/source/test/addons/simple-prefs-l10n/package.json

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+{
+  "id": "test-simple-prefs-l10n",
+  "preferences": [{
+    "name": "somePreference",
+    "title": "some-title",
+    "description": "Some short description for the preference",
+    "type": "string",
+    "value": "TEST"
+  }]
+}