将硒与TestNg一起使用，测试指南适配器正在混合测试，驱动程序似乎在测试类之间共享

Question

我正在使用硒（硒服务器独立2.47.1.jar）网格运行并行测试，该网格由Ant启动，由蚂蚁启动，并使用测试通知器适配器。屏幕截图是在侦听者的“测试失败”方法中拍摄的。问题在于，侦听器似乎对它应该使用哪个驱动程序感到困惑，有时会截取错误的浏览器窗口的屏幕截图，或者如果它认为应该使用的驱动程序已经退出，则完全失败。

当测试开始时，TestNg 的@BeforeTest和测试提示器的“onTestStart”方法在同一线程上运行，但是当测试失败时，测试提示程序的“onTestFailure”方法似乎在单独的线程上运行。似乎线程以某种方式交叉/共享，但我不知道为什么。

这里是一些框架代码，非常感谢您的帮助。

基础测试类：

public class baseClassTests{

    protected AutomationUtils au;
    protected DriverUtils du;

    @BeforeTest(alwaysRun = true)
    @Parameters({ "selenium.OS", "selenium.browser" })
    public void beforeTest(String OS, String browser) {

        //these call simple private methods to know where to set up the driver
        String port = getPort(OS, browser);
        String host = getHost(OS);

        //make a driver utility object here, this makes a driver
        du = new DriverUtils(browser, host, port);

        //pass this driver utility object to another class of utilities
        //this 'AutomationUtils' class gets a RemoteWebDriver ('driver') by calling driver=du.getDriver();
        //the 'AutomationUtils' class is then the one that does all of the 'driver.findBy...' etc
        au = new AutomationUtils(du);
    }


    @BeforeMethod(alwaysRun = true)
    public void beforeMethod(Method m, ITestResult tr) {
        du.deleteCookies();
        testNgTestName = m.getName();
        print("Method: "+testNgTestName + "   Thread: "+Thread.currentThread().hashCode());
        //set the attribute of the ITestResult object so we can use the same object in the listener
        tr.setAttribute("du", du);
        tr.setAttribute("au", au);
    }

}

侦听器类

public class AmSimpleTestListener extends TestListenerAdapter {

    private DriverUtils driveU;
    private AutomationUtils AutoU;
    private RemoteWebDriver driver;
    private RemoteWebDriver augmentedDriver;
    private String methodName;
    private String browser;
    private String browserVersion;
    String testClass;




    @Override
    public void onTestStart(ITestResult tr) {
        //pick up the correct driver utility object from the test class/method we are in
        driveU = (DriverUtils) tr.getAttribute("du");
        AutoU = (AutomationUtils) tr.getAttribute("au");
        driver = du.getDriver();
        augmentedDriver = (RemoteWebDriver) new Augmenter().augment(driver);
        methodName = tr.getName();
        testClass=tr.getTestClass();  //sort of, I actually parse it up a bit
        browser = driveU.getBrowser();
        browserVersion = driveU.getBrowserVersion();
        print("Method: "+methodName + "   Thread: "+Thread.currentThread().hashCode());
    }

    @Override
    public void onTestFailure(ITestResult tr) {
       print("Method: "+tr.getName() + "   Thread: "+Thread.currentThread().hashCode());
        try{
            writeScreenshotFile();
        }
        catch (Exception e){
            Out.error("Unable to take screen shot");
            e.printStackTrace();
        }
    }


    private String writeScreenshotFile() {
        if (driver != null && driver.getSessionId() != null) {
            File scrShot = ((TakesScreenshot) augmentedDriver).getScreenshotAs(OutputType.FILE);
            File localPathToScreenShot = new File("/path/to/base/directory/"+testClass+"/"+methodName+".png");
            try {
                FileUtils.copyFile(scrShot, localPathToScreenShot);
            } catch (Exception e) {
                Out.error("Couldn't write screenshot to file");
            }
            return localPathToScreenShot.getAbsolutePath();
        }
        return "Could not get path.";
    }

}

DriverUtils类生成/提供驱动程序

public class DriverUtils {

    private RemoteWebDriver driver;
    private int timeout;
    private String browserVersion;
    private String browser
    private DesiredCapabilities caps;

    public DriverUtils(String browser, String host, String port) {
        String hostUrl = "http://" + host + ":" + port + "/wd/hub";
        this.browser=browser;
        //do some stuff here to set capabilties
        driver = new RemoteWebDriver(new URL(hostUrl), caps);
        browserVersion = driver.getCapabilities().getVersion();
    }

    public RemoteWebDriver getDriver() {
        return driver;
    }

    public AmBrowser getBrowser() {
        return browser;
    }

    public String getBrowserVersion() {
        return browserVersion;
    }


    public void quitDriver() {
        driver.quit();
    }

    public void deleteCookies(){
        driver.manage().deleteAllCookies();
    }


}


public class AutomationUtils extends BaseClassUtils {

    public AutomationUtils(DriverUtils driverUtils) {
        //pass it up to the base class utils (this is different than base class tests, above)
        //do this so the driver can be accessed by other utility classes as well
        super(driverUtils);
    }

    //All sorts of methods here to find elements, login, blah blah everything that is done with a driver object
}


public class BaseClassUtils { //this is a different class than BaseClassTests

    //make the driver a protected object so all utility classes can access as nec.
    protected final RemoteWebDriver driver;

    public BaseClassUtils(DriverUtils driverUtils) {
         driver = driverUtils.getDriver();
    }

}

测试是通过ant运行的。

<suite name="Dev2 for debugging" parallel="tests" thread-count="10">-- tests here </suite>

Answer 1

尝试使用ThreadLocal for RemoteWebDriver，以便它可以处理并行运行：

public class DriverUtils {
    private static ThreadLocal<RemoteWebDriver> driver = new ThreadLocal<~>();
    private int timeout;
    private String browserVersion;
    private String browser
    private DesiredCapabilities caps;

    public DriverUtils(String browser, String host, String port) {
        String hostUrl = "http://" + host + ":" + port + "/wd/hub";
        this.browser=browser;
        //do some stuff here to set capabilties
        driver.set(new RemoteWebDriver(new URL(hostUrl), caps));
        browserVersion = getDriver().getCapabilities().getVersion();
    }

    public RemoteWebDriver getDriver() {
        return driver.get();
    }

    public AmBrowser getBrowser() {
        return browser;
    }

    public String getBrowserVersion() {
        return browserVersion;
    }


    public void quitDriver() {
        getDriver().quit();
    }

    public void deleteCookies(){
        getDriver().manage().deleteAllCookies();
    }
}

Answer 2

在修补了一段时间后，我得出结论，有两件事似乎很有帮助。

1. 消除侦听器，并在@AfterMethod
中截取所有屏幕截图
2. 将@前/后方法/测试方法移动到子类中，但只需调用父类中的方法来完成所有工作。

我注意到的另一件事是，对于#2，TestNG应该运行父< code>@Before方法，然后运行子< code>@Before方法；最后运行子“@After”方法，然后运行父< code>@After方法。< br >我运行了一系列简单的测试，发现所有的before/after方法都没有运行，所以对于在父级和子级中都使用< code>@Before和< code>@After方法的少数情况，我进行了合并。

现在事情似乎运行得更好了，驱动程序不会感到困惑，屏幕截图被附加到正确的浏览器/测试中。