如何在Windows 10上搭建winium Driver服务？

Question

I am using the following class code for launching calculator via WiniumDriver. Before creating an instance of WiniumDriver, I am starting a winium driver service.

import java.io.File;
import java.io.IOException;

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.winium.DesktopOptions;
import org.openqa.selenium.winium.WiniumDriver;
import org.openqa.selenium.winium.WiniumDriverService;
import org.testng.annotations.AfterClass;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class CalculatorTest {

    static WiniumDriver driver = null;
    static WiniumDriverService service = null;
    static DesktopOptions options = null;

    @BeforeClass
    public static void setupEnvironment(){
        options = new DesktopOptions(); //Instantiate Winium Desktop Options
        options.setApplicationPath("C:\\Windows\\System32\\calc.exe");
        File driverPath = new File("C:\\Winium\\Winium.Desktop.Driver.exe");
        System.setProperty("webdriver.winium.desktop.driver","C:\\Winium\\Winium.Desktop.Driver.exe");
        service = new WiniumDriverService.Builder().usingDriverExecutable(driverPath).usingPort(9999).withVerbose(true)
                .withSilent(false).buildDesktopService();
        try {
            service.start();
        } catch (IOException e) {
            System.out.println("Exception while starting WINIUM service");
            e.printStackTrace();
        }
    }

    @BeforeTest
    public void startDriver(){
        driver = new WiniumDriver(service,options);
    }

    @AfterTest
    public void stopDriver(){
        driver.close();
    }

    @AfterClass
    public void tearDown(){
        service.stop();
    }

After running the test class as TestNG item, following exception is observed.

FAILED CONFIGURATION: @BeforeTest startDriver
java.lang.NullPointerException
    at org.openqa.selenium.winium.WiniumDriverCommandExecutor.<init>(WiniumDriverCommandExecutor.java:59)
    at org.openqa.selenium.winium.WiniumDriver.<init>(WiniumDriver.java:75)
    at com.bravura.automation.CalculatorTest.startDriver(CalculatorTest.java:41)

I double checked the path to calc.exe and Winium.Desktop.Driver.exe, still I am not able to launch the WiniumDriverService. Is there any other way to start this service? Does winium support windows 10?

Answer 1

The problem here is that, 'startDriver' is executing before setupEnvironment method and the variables service and options are not initialized. Hence it is throwing null pointer exception.

because the order of execution in testNG is given below.

@BeforeSuite
@BeforeTest
@BeforeClass
@BeforeMethod
@Test
@AfterMethod
@AfterClass
@AfterTest
@AfterSuite

There are three solutions.

1. change the annotation for the following methods as given below. so that, the start driver will run after the setup environment method.

     @BeforeMethod public void startDriver(){ driver = new WiniumDriver(service,options); } @AfterMethod public void stopDriver(){ driver.close(); } 

2. change the annotations as given below.

    @BeforeTest public static void setupEnvironment(){ options = new DesktopOptions(); //Instantiate Winium Desktop Options options.setApplicationPath("C:\\\\Windows\\\\System32\\\\calc.exe"); File driverPath = new File("C:\\\\Winium\\\\Winium.Desktop.Driver.exe"); System.setProperty("webdriver.winium.desktop.driver","C:\\\\Winium\\\\Winium.Desktop.Driver.exe"); service = new WiniumDriverService.Builder().usingDriverExecutable(driverPath).usingPort(9999).withVerbose(true) .withSilent(false).buildDesktopService(); try { service.start(); } catch (IOException e) { System.out.println("Exception while starting WINIUM service"); e.printStackTrace(); } } @BeforeClass public void startDriver(){ driver = new WiniumDriver(service,options); } @AfterClass public void stopDriver(){ driver.close(); } @AfterTest public void tearDown(){ service.stop(); } 

3. change the annotations as given below. I believe, this one will be optimal solution.

    @BeforeTest public static void setupEnvironment(){ options = new DesktopOptions(); //Instantiate Winium Desktop Options options.setApplicationPath("C:\\\\Windows\\\\System32\\\\calc.exe"); File driverPath = new File("C:\\\\Winium\\\\Winium.Desktop.Driver.exe"); System.setProperty("webdriver.winium.desktop.driver","C:\\\\Winium\\\\Winium.Desktop.Driver.exe"); service = new WiniumDriverService.Builder().usingDriverExecutable(driverPath).usingPort(9999).withVerbose(true) .withSilent(false).buildDesktopService(); try { service.start(); } catch (IOException e) { System.out.println("Exception while starting WINIUM service"); e.printStackTrace(); } } @BeforeMethod public void startDriver(){ driver = new WiniumDriver(service,options); } @AfterMethod public void stopDriver(){ driver.close(); } @AfterTest public void tearDown(){ service.stop(); } 

Answer 2

1. Here is the correct way of using it

public class SimpleTest
{
    DesktopOptions options;
    WiniumDriverService service;
    WiniumDriver driver;

    @BeforeTest
    public void bt()
    {
        //Instantiate Winium Desktop Options
        options = new DesktopOptions();
        
        // Path of application you want to run and test
        options.setApplicationPath("C:\\Windows\\System32\\calc.exe");
        
        //Path for Winium Desktop Driver
        File driverPath = new File(System.getProperty("user.dir")+File.separator+"drivers"+File.separator+"Winium.Desktop.Driver.exe");
        
        //Port is 9999, you can change it
        service = new WiniumDriverService.Builder().usingDriverExecutable(driverPath).usingPort(9999).withVerbose(true).withSilent(false).buildDesktopService();
        
        try
        {
             service.start();
        }
        catch (IOException e)
        {
            System.out.println("Exception while starting WINIUM service");
            e.printStackTrace();
        }
        driver = new WiniumDriver(service,options);
    }

    @AfterTest
    public void at()
    {
        service.stop();
    }
}

2. If you need other configuration you can refer this link . However, I would not recommend that you use Winium for Windows automation even for basic Calculator program it will not work properly, last release of Winium was in 2016, I don't think it is regularly maintained now. Instead use WinAppDriver, which is far better tool and with good documentation. To start with refer this link