java - 无法在子类中使用EventFiringWebDriver对象

我试图在自己的项目中设置EventFiringWebDriver，但在某个时刻EventFiringWebDriver对象在同一类中不能正常工作而在子类中则无法工作。

家长班：

package utility;

import java.util.List;

import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.events.EventFiringWebDriver;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;

import eventListeners.WebDriverEventHandler;


public class common {
    public static WebDriver driver = null;
    protected static EventFiringWebDriver eDriver;
    WebDriverEventHandler handler;
    protected NavigatetoOverviews nav;

    @BeforeClass
    public void beforeClass() throws InterruptedException {

        handler = new WebDriverEventHandler();
        System.setProperty("webdriver.firefox.profile", "default");
        driver = new FirefoxDriver();
        eDriver = new EventFiringWebDriver(driver);
        eDriver.register(handler);

        nav = new NavigatetoOverviews();
        eDriver.get("http://google.com");
    }
}

我的孩子班：

package eventListeners;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.testng.annotations.Test;

import bsh.commands.dir;
import utility.common;

public class TestExtendsCommon extends common{

    @Test
    public void sample() {

        eDriver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
        eDriver.findElement(By.id("gbqfq")).sendKeys("Selenium");
        eDriver.findElement(By.id("gbqfba")).click();

    }
}

我的测试结果：

[TestNG] Running:
  C:\Users\Hema\AppData\Local\Temp\testng-eclipse--492139263\testng-customsuite.xml

Just before beforeNavigateTo http://google.com
Inside the afterNavigateTo to http://google.com
FAILED: sample
java.lang.NullPointerException
    at eventListeners.WebDriverEventHandler.beforeFindBy(WebDriverEventHandler.java:35)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.openqa.selenium.support.events.EventFiringWebDriver$1.invoke(EventFiringWebDriver.java:78)
    at com.sun.proxy.$Proxy5.beforeFindBy(Unknown Source)
    at       org.openqa.selenium.support.events.EventFiringWebDriver.findElement(EventFiringWebDriver.java:183)
    at eventListeners.TestExtendsCommon.sample(TestExtendsCommon.java:17)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
    at org.testng.SuiteRunner.run(SuiteRunner.java:240)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
    at org.testng.TestNG.run(TestNG.java:1057)
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)


===============================================
    Default test
    Tests run: 1, Failures: 1, Skips: 0
===============================================


===============================================
Default suite
Total tests run: 1, Failures: 1, Skips: 0
===============================================

[TestNG] Time taken by [FailedReporter passed=0 failed=0 skipped=0]: 7 ms
[TestNG] Time taken by org.testng.reporters.JUnitReportReporter@77afea7d: 23 ms
[TestNG] Time taken by org.testng.reporters.EmailableReporter2@6d86b085: 8 ms
[TestNG] Time taken by org.testng.reporters.jq.Main@299a06ac: 34 ms
[TestNG] Time taken by org.testng.reporters.XMLReporter@4ac68d3e: 9 ms
[TestNG] Time taken by org.testng.reporters.SuiteHTMLReporter@1f89ab83: 40 ms

提前致谢。

最佳答案

感谢所有在此问题上花费了一些时间的人。终于我找到了答案。

如错误所述，错误在beforeFindBy类的WebDriverEventListener方法中。

at eventListeners.WebDriverEventHandler.beforeFindBy(WebDriverEventHandler.java:35)


public void beforeFindBy(By arg0, WebElement arg1, WebDriver arg2) {

    System.out.println("Just before finding element " + arg1.toString());
}

在上述程序中，当通过WebDriver对象查找元素时，arg1参数将为null。所以我修改了如下代码：

public void beforeFindBy(By arg0, WebElement arg1, WebDriver arg2) {

        if (arg1 == null) {
            System.out.println("Just before finding element: " + arg0.toString() + " on browser: " + arg2.toString() );

        } else {
            System.out.println("Just before finding element: " + arg0.toString() + " inside " + arg1.toString() + " Web element on browser: " + arg2.toString() );
        }

    }