java - 当测试用例在范围报告中失败时，TestNG : Getting java. lang.ClassCastException

Question

当测试用例在范围报告中失败时，获取 java.lang.ClassCastException。 我有一个 TestListener 类，它在一个包中实现了 onpass、onfailure、onskipp 方法声明，并在一个包中具有 Test 类，并且 Webdriver 在第三个包的基类下声明，这样做是为了更好的可读性。

现在，每当测试用例失败时，控制就会转到 onfailure，我们已经实现了屏幕截图功能，这就是我的代码失败的地方。

onfailure方法-

 public void onTestFailure(ITestResult iTestResult) {
    System.out.println("I am in onTestFailure method " +  getTestMethodName(iTestResult) + " failed");

    //Get driver from BaseTest and assign to local webdriver variable.
    Object testClass = iTestResult.getInstance();

    WebDriver webDriver = ((BaseClass) testClass).getDriver();

    //Take base64Screenshot screenshot.
    String base64Screenshot = "data:image/png;base64,"+((TakesScreenshot)webDriver).
          getScreenshotAs(OutputType.BASE64);


    //Extentreports log and screenshot operations for failed tests.
    ExtentTestManager.getTest().log(LogStatus.FAIL,"Test case failed",
           ExtentTestManager.getTest().addBase64ScreenShot(base64Screenshot));
    //ExtentTestManager.getTest().log(LogStatus.FAIL, "Test case failed as:"+iTestResult.getThrowable());
}

基类:

 public WebDriver getDriver()
 {
if (driver == null)
{
 System.setProperty("webdriver path here"); 
  driver= new ChromeDriver();
  return driver;
}
else
{
  return driver;
}
}

错误日志-

java.lang.ClassCastException: VWAutomationTest.TestVWLoginPage cannot be cast to Utility.BaseClass
at Listeners.TestListener.onTestFailure(TestListener.java:77)
at org.testng.internal.TestListenerHelper.runTestListeners(TestListenerHelper.java:67)
at org.testng.internal.Invoker.runTestListeners(Invoker.java:1388)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1041)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

Answer 1

我找到了答案

我犯的错误是我没有在我的测试类和 TeSTListener 以及 VWAutomationTest.TestVWLoginpage 中扩展基类，我正在调用基类的对象，因此我收到了错误。 为了使它工作，我只是扩展了基类，即

public class TestVWLoginPage extends Utility.BaseClass 

其他一切保持不变。