如何解析Java.lang.threadLocal.get（）尝试在testng.xml中运行并行执行时是无效的？

Question

In testng.xml, I am running few tests paralleled(parallel="classes" thread-count="5") and few sequentially as two different tests. But for first testmethod from second test it is throwing NullPointerException because value of Java.lang.ThreadLocal.get() is null. I am calling setDriver() from InvokedMethodListener.beforeInvocation() and removeDriver() from InvokedMethodListener.afterInvocation().

`public class DriverFactory {
 private static DriverFactory instance = new DriverFactory();

 public static synchronized DriverFactory getInstance() {
    return instance;
 }

 ThreadLocal<WebDriver> tlDriver = new ThreadLocal<>();

 public synchronized void setDriver(String browserName) {
    if (browserName.equalsIgnoreCase("chrome")) {
        ChromeOptions chromeOptions = new ChromeOptions();
        chromeOptions.addArguments("disable-infobars");
        chromeOptions.addArguments("--start-maximized");
        chromeOptions.addArguments("--headless");
        System.setProperty("webdriver.chrome.args", "--disable-logging");
        System.setProperty("webdriver.chrome.silentOutput", "true");
        WebDriverManager.chromedriver().setup();
        tlDriver.set(new ChromeDriver(chromeOptions));

    } else if (browserName.equalsIgnoreCase("firefox")) {
         System.setProperty("webdriver.gecko.driver", System.getProperty("user.dir") +
         "/Drivers/geckodriver.exe");
        FirefoxProfile firefoxProfile = new FirefoxProfile();
        FirefoxOptions firefoxOptions = new FirefoxOptions();
        firefoxOptions.setHeadless(true).setProfile(firefoxProfile);
        System.setProperty("webdriver.firefox.args", "--disable-logging");
        System.setProperty("webdriver.firefox.silentOutput", "true");
        tlDriver.set(new FirefoxDriver(firefoxOptions));
    } 
 public synchronized void removeDriver() {
    try {
    tlDriver.get().quit();
    tlDriver.remove();
    }
    catch(Exception e) {
        e.printStackTrace();
        System.out.println("***AfterRemove***");
        System.out.println(e);
        //System.out.println(e.getMessage());
    }
   }
   }

 `

我已经尝试更改测试的顺序，但没有用。问题可能与线程池的WebDriver实例正确设置。可能已经死了。

Answer 1

您要运行的方法应为（suite＆gt; test＆gt; class＆gt; class＆gt; class＆gt; class＆gt;方法）在testng xml中，还提及侦听器（suite＆gt;听众＆gt; listerer）testng xml中