Allow to use IKEA TRADFRI OTA test server. https://github.com/Koenkk/zigbee2mqtt/issues/2921

lib/extension/otaUpdate.js

@@ -3,6 +3,7 @@ const logger = require('../util/logger');
 const stringify = require('json-stable-stringify-without-jsonify');
 const utils = require('../util/utils');
 const legacyTopicRegex = new RegExp(`^${settings.get().mqtt.base_topic}/bridge/ota_update/.+$`);
+const tradfriOTA = require('zigbee-herdsman-converters/ota/tradfri');
 const topicRegex =
     new RegExp(`^${settings.get().mqtt.base_topic}/bridge/request/device/ota_update/(update|check)`, 'i');
 
@@ -15,6 +16,10 @@ class OTAUpdate extends Extension {
         this.inProgress = new Set();
         this.lastChecked = {};
         this.legacyApi = settings.get().advanced.legacy_api;
+
+        if (settings.get().advanced.ikea_ota_use_test_url) {
+            tradfriOTA.useTestURL();
+        }
     }
 
     onMQTTConnected() {

test/otaUpdate.test.js

@@ -19,6 +19,7 @@ describe('OTA update', () => {
     beforeEach(async () => {
         data.writeDefaultConfiguration();
         settings._reRead();
+        settings.set(['advanced', 'ikea_ota_use_test_url'], true);
         data.writeEmptyState();
         controller = new Controller();
         await controller.start();