Bug 1469943 - Enterprise policy to set a custom app update URL. r=felipe

browser/components/enterprisepolicies/Policies.jsm

@@ -61,6 +61,12 @@ var EXPORTED_SYMBOLS = ["Policies"];
  * The callbacks will be bound to their parent policy object.
  */
 var Policies = {
+  "AppUpdateURL": {
+    onBeforeAddons(manager, param) {
+      setDefaultPref("app.update.url", param.href);
+    }
+  },
+
   "Authentication": {
     onBeforeAddons(manager, param) {
       if ("SPNEGO" in param) {

browser/components/enterprisepolicies/schemas/policies-schema.json

@@ -2,6 +2,12 @@
   "$schema": "http://json-schema.org/draft-04/schema#",
   "type": "object",
   "properties": {
+    "AppUpdateURL": {
+      "description": "Sets custom app update server URL.",
+      "machine_only": true,
+      "type": "URL"
+    },
+
     "Authentication": {
       "description": "Sites that support integrated authentication. See https://developer.mozilla.org/en-US/docs/Mozilla/Integrated_authentication",
 

browser/components/enterprisepolicies/tests/browser/browser.ini

@@ -20,6 +20,7 @@ support-files =
 [browser_policies_simple_pref_policies.js]
 [browser_policies_sorted_alphabetically.js]
 [browser_policy_app_update.js]
+[browser_policy_app_update_URL.js]
 [browser_policy_block_about_addons.js]
 [browser_policy_block_about_config.js]
 [browser_policy_block_about_profiles.js]

browser/components/enterprisepolicies/tests/browser/browser_policy_app_update_URL.js

+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_app_update_URL() {
+  await setupPolicyEngineWithJson({
+    "policies": {
+      "AppUpdateURL": "https://www.example.com/"
+    }
+  });
+
+  is(Services.policies.status, Ci.nsIEnterprisePolicies.ACTIVE, "Engine is active");
+
+  let expected = Services.prefs.getStringPref("app.update.url", undefined);
+
+  is("https://www.example.com/", expected, "Correct app update URL");
+});