java - Appium:我有 2 个类，ClassA 和 ClassB。我正在使用 testng.xml 文件执行这 2 个类。我想知道 ClassB 的数据，我需要放置 @Beforeclass 吗？

Question

第一类:

public class LaunchApp {

    AndroidDriver<WebElement> driver;

    @BeforeTest
    public void Test1() throws MalformedURLException {

        DesiredCapabilities capability = new DesiredCapabilities();

        capability.setCapability("deviceName", "Android");
        capability.setCapability("platformName", "Android");
        capability.setCapability("platformVersion", "5.1.1");
        capability.setCapability("deviceName", "Samsung Galaxy On5");
        capability.setCapability("app",
                "D:\\whatsapp.apk");
        capability.setCapability("PackageName",
                "com.movocado.socialbostonsports");
        capability.setCapability("ActivityName",
                "com.movocado.socialbostonsports.Activity.LogInSceen");

        try {
            driver = new AndroidDriver<WebElement>(new URL(
                    "http://127.0.0.1:4723/wd/hub"), capability);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }

        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

    }

2级:

public class DrawerMenuTest {
    AndroidDriver<WebElement> driver;

    @Test(priority = 1)
    public void DrawerMenuIcon() {

        WebElement drawerMenu = driver.findElement(By
                .id("com.movocado.socialbostonsports:id/rel_drawer"));
        try {
            drawerMenu.click();
        } catch (NullPointerException e) {
            System.out.println(e.getMessage());
        }

    }

问题:第二节课显示 NullPointerException。建议我一个解决方案。

Answer 1

您正在将 AndroidDriver 初始化到 LaunchApp 中，但没有将此驱动程序引用传递到 DrawerMenuTest 中，您仅使用 null 创建 AndroidDriver 的引用变量，这是导致 NullPointerException 的原因。

要克服这个问题，您应该创建单独的 singlton 类，该类将为每个类提供 AndroidDriver 的单个实例，如下所示:-

public class DriverInit {

    private AndroidDriver<WebElement> driver;

    private static DriverInit driverInit = null;

    public static DriverInit getInstance() {
        if (driverInit == null) {
            driverInit = new DriverInit();
        }
        return driverInit;
    }

    private DriverInit() {
         DesiredCapabilities capability = new DesiredCapabilities();

         capability.setCapability("deviceName", "Android");
         capability.setCapability("platformName", "Android");
         capability.setCapability("platformVersion", "5.1.1");
         capability.setCapability("deviceName", "Samsung Galaxy On5");
         capability.setCapability("app", "D:\\whatsapp.apk");
         capability.setCapability("PackageName",  "com.movocado.socialbostonsports");
         capability.setCapability("ActivityName", "com.movocado.socialbostonsports.Activity.LogInSceen");


         this.driver = new AndroidDriver<WebElement>(new URL(
                "http://127.0.0.1:4723/wd/hub"), capability);

         this.driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
    }

    public WebDriver getDriver() {
        return this.driver;
    }
}

现在您可以将其使用到 LaunchApp 类中，如下所示:-

public class LaunchApp {

        AndroidDriver<WebElement> driver;

        @BeforeTest
        public void Test1() throws MalformedURLException {
            driver = DriverInit.getInstance().getDriver();
            //now do your stuff with this driver
        }
  }

并在 DrawerMenuTest 类中使用，如下所示:-

public class DrawerMenuTest {
    AndroidDriver<WebElement> driver;

    @Test(priority = 1)
    public void DrawerMenuIcon() {
        //get driver instance first
        driver = DriverInit.getInstance().getDriver();

        WebElement drawerMenu = driver.findElement(By
                .id("com.movocado.socialbostonsports:id/rel_drawer"));
        try {
            drawerMenu.click();
        } catch (NullPointerException e) {
            System.out.println(e.getMessage());
        }

    }
}

希望有帮助..:)