Appium Java TestNG Framework>Launch Appium programatically via Mac null point exception with appium main.js file

Mac book air

Java 1.8

Appium Desktop version 1.8.1

Hi Guys,

I am building a TestNG framework and and I want to start my appium Desktop server programmatically for my tests. So what I decided to do was to create a java test class to invoke appium for me, I thought I'd coded it ok but when I ran it just to check. Got a 'null point exception'

'null point exception'

1. What did I do wrong?

2. How do I fix this?

Here is the launch appium programmatically code:

package aappiumLaunchServer;

import java.io.File;

import io.appium.java_client.service.local.AppiumServiceBuilder;

public class LaunchAppium

private static AppiumServiceBuilder service;

public static void main(String args)
//text
stopAppium();
startAppium();
stopAppium();


public static void startAppium()
System.out.println("Start Appium Server");
service = new AppiumServiceBuilder().usingDriverExecutable(new File("/usr/local/bin/node"))
.withAppiumJS(new File ("/Applications/Appium.app/Contents/Resources/app/node_modules/appium/build/lib/main.js "));
service.build().start();
System.out.println("You can now use Appium Server");


public static void stopAppium()
System.out.println("Appium Server is shutting down....");
try
service.build().stop();
catch (Exception e)
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("Your current appium session is terminated... ");

System.out.println(" Appium Server has shut down. Thank you for using Appium Server");





Here is the message from eclipse

appium Server is shutting down....
java.lang.NullPointerExceptionYour current appium session is terminated...
Appium Server has shut down. Thank you for using Appium Server
Start Appium Server

at aappiumLaunchServer.LaunchAppium.stopAppium(LaunchAppium.java:44)
at aappiumLaunchServer.LaunchAppium.main(LaunchAppium.java:16)
Exception in thread "main" io.appium.java_client.service.local.InvalidServerInstanceException: Invalid server instance exception has occured: The invalid appium node /Applications/Appium.app/Contents/Resources/app/node_modules/appium/build/lib/main.js has been defined
at io.appium.java_client.service.local.AppiumServiceBuilder.validateNodeStructure(AppiumServiceBuilder.java:102)
at io.appium.java_client.service.local.AppiumServiceBuilder.checkAppiumJS(AppiumServiceBuilder.java:294)
at io.appium.java_client.service.local.AppiumServiceBuilder.createArgs(AppiumServiceBuilder.java:389)
at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:342)
at aappiumLaunchServer.LaunchAppium.startAppium(LaunchAppium.java:29)
at aappiumLaunchServer.LaunchAppium.main(LaunchAppium.java:17)
Caused by: java.io.IOException: The node /Applications/Appium.app/Contents/Resources/app/node_modules/appium/build/lib/main.js doesn't exist
at io.appium.java_client.service.local.AppiumServiceBuilder.validateNodeStructure(AppiumServiceBuilder.java:104)
... 5 more


2 Answers
2

Just with the debug mode at startAppium method try to create a file instance

new File ("/Applications/Appium.app/Contents/Resources/app/node_modules/appium/build/lib/main.js "


This will probably show you that it can not find the file

It seems you are trying to use JS main.js file from Appium.app instead install appium using node and you should find your file under

Appium_MAIN_JS = System.getenv(APPIUM_HOME)+"/node_modules/appium/build/lib/main.js" (define APPIUM_HOME in your bash_profile)
It's possible that your code does not have access to reach Appium.app (I presume it is in Application folder)

and then you can call
.buildService(new AppiumServiceBuilder().withAppiumJS(new File(Appium_MAIN_JS)))

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