尝试登录 @Test 方法时出现 ExentTest 的 NullPointerException

Question

我有一个 TestNG 框架，目前使用 Extent Reports 设置，我正在使用 ITestListener 来处理报告。它工作正常，直到我尝试在我的@Test 方法中为各个测试步骤添加日志记录。

我在 baseTests.java 中声明了我的 ExtentTest 'test'，然后在我的 onTestStart() 侦听器中将其初始化，但是 'test' 在我的@中作为 'null' 返回测试.

我试过移动 ExtentTest 声明，但似乎没有任何区别。有没有办法使用在 onTestStart() 中初始化的测试实例？

baseTests.java

package base;

import com.aventstack.extentreports.ExtentReports;
import com.aventstack.extentreports.ExtentTest;
import org.openqa.selenium.WebDriver;
import org.testng.annotations.BeforeMethod;

public class baseTests  {
    public ExtentReports extent = ExtentReporterNG.getReportObject();
    public ExtentTest test;

    @BeforeMethod
    public void setUp() throws IOException {
        // Test set-up code
    }
}

ExtentReportNG.java

package base;

import com.aventstack.extentreports.ExtentReports;
import com.aventstack.extentreports.reporter.ExtentSparkReporter;

public class ExtentReporterNG {
    static public ExtentReports extent;
    public static ExtentReports getReportObject() {
        String path = System.getProperty("user.dir")+"/reports/report.html";
        ExtentSparkReporter reporter = new ExtentSparkReporter(path);
        reporter.config().setReportName("Automation Tests");
        extent = new ExtentReports();
        extent.attachReporter(reporter);
        return extent;
    }
}

Listeners.java

package base;

import com.aventstack.extentreports.Status;
import org.testng.ITestContext;
import org.testng.ITestListener;
import org.testng.ITestResult;

public class Listeners extends baseTests implements ITestListener {

    @Override
    public void onTestStart(ITestResult result) {
        test = extent.createTest(result.getMethod().getMethodName());
    }

    @Override
    public void onTestSuccess(ITestResult result) {
        test.log(Status.PASS, "Test Passed");
    }

    @Override
    public void onTestFailure(ITestResult result) {
        test.fail(result.getThrowable());
    }

    @Override
    public void onFinish(ITestContext context) {
        extent.flush();
    }

}

myTest.java

package test;

import base.baseTests;
import com.aventstack.extentreports.ExtentTest;
import com.aventstack.extentreports.Status;
import org.testng.Assert;
import org.testng.annotations.Test;
import pages.*;

public class myTest extends baseTests {

    @Test
    public void test1(){
        // Some test code
        test.log(Status.PASS, "Some test step");
        // Assert statement
    }

堆栈跟踪

java.lang.NullPointerException: Cannot invoke "com.aventstack.extentreports.ExtentTest.log(com.aventstack.extentreports.Status, String)" because "this.test" is null

    at test.myTest.test1(myTest.java:15)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:133)
    at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:598)
    at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:173)
    at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
    at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:824)
    at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:146)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at org.testng.TestRunner.privateRun(TestRunner.java:794)
    at org.testng.TestRunner.run(TestRunner.java:596)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:377)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:371)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:332)
    at org.testng.SuiteRunner.run(SuiteRunner.java:276)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1212)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1134)
    at org.testng.TestNG.runSuites(TestNG.java:1063)
    at org.testng.TestNG.run(TestNG.java:1031)
    at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
    at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)

Answer 1

我只需要将 ExtentTest 设为静态。现在，测试步骤已按照我的意愿记录到测试中。

public static ExtentTest test;

尝试登录 @Test 方法时出现 ExentTest 的 NullPointerException

NullPointerException for ExentTest when trying to log inside a @Test method

java

selenium

testng

extentreports

selenium-extent-report