fix generating port for debug socket when debugging ios with chrome devtools

When generating a port to start a websocket on, use the same logic as is present in the android debug service - get the first available available port in a range, and reuse it for the next debug session of the same application if it is still available

Author: petekanev

lib/services/ios-debug-service.ts

@@ -32,7 +32,8 @@ export class IOSDebugService extends DebugServiceBase implements IPlatformDebugS
 		private $iOSNotification: IiOSNotification,
 		private $iOSSocketRequestExecutor: IiOSSocketRequestExecutor,
 		private $processService: IProcessService,
-		private $socketProxyFactory: ISocketProxyFactory) {
+		private $socketProxyFactory: ISocketProxyFactory,
+		private $net: INet) {
 		super(device, $devicesService);
 		this.$processService.attachToProcessExitSignals(this, this.debugStop);
 		this.$socketProxyFactory.on(CONNECTION_ERROR_EVENT_NAME, (e: Error) => this.emit(CONNECTION_ERROR_EVENT_NAME, e));
@@ -212,7 +213,7 @@ export class IOSDebugService extends DebugServiceBase implements IPlatformDebugS
 				this.$logger.info("'--chrome' is the default behavior. Use --inspector to debug iOS applications using the Safari Web Inspector.");
 			}
 
-			this._socketProxy = await this.$socketProxyFactory.createWebSocketProxy(this.getSocketFactory(device));
+			this._socketProxy = await this.$net.getAvailablePortInRange(41000);
 			return this.getChromeDebugUrl(debugOptions, this._socketProxy.options.port);
 		}
 	}

test/services/ios-debug-service.ts

@@ -17,9 +17,10 @@ class IOSDebugServiceInheritor extends IOSDebugService {
 		$iOSNotification: IiOSNotification,
 		$iOSSocketRequestExecutor: IiOSSocketRequestExecutor,
 		$processService: IProcessService,
-		$socketProxyFactory: ISocketProxyFactory) {
+		$socketProxyFactory: ISocketProxyFactory,
+		$net: INet) {
 		super(<any>{}, $devicesService, $platformService, $iOSEmulatorServices, $childProcess, $hostInfo, $logger, $errors,
-			$npmInstallationManager, $iOSNotification, $iOSSocketRequestExecutor, $processService, $socketProxyFactory);
+			$npmInstallationManager, $iOSNotification, $iOSSocketRequestExecutor, $processService, $socketProxyFactory, $net);
 	}
 
 	public getChromeDebugUrl(debugOptions: IDebugOptions, port: number): string {
@@ -48,6 +49,12 @@ const createTestInjector = (): IInjector => {
 		on: (event: string | symbol, listener: Function): any => undefined
 	});
 
+	testInjector.register("net", {
+		getAvailablePortInRange: function (startPort: number, endPort?: number): any {
+			return 41000;
+		}
+	});
+
 	return testInjector;
 };