Question

我正在尝试执行以下程序但得到空指针错误。其中@test无法访问对象 - 驱动程序。可能是我正在犯的错误。错误 -

JavaScript警告：https://www.google.com/xjs/_/js/k=xjs.s.en_US.MHBUsB8Me90.O/m=sx,c,sb,cdos,cr,elog,hsm,jsa,r,qsm,d,csi/am=wCJGjhccAPk_IRQStxAWyAImDiA/rt=j/d=1/t=zcms/rs=ACT90oGwMPBWhsFBKoM1svJAFUVoVQRQug，第7行：改变对象的[[Prototype]]会导致代码运行得非常慢;而是使用Object.create创建具有正确的初始[[Prototype]]值的对象 https://www.google.com/?gws_rd=ssl 失败：websiteTitle

java.lang.NullPointerException
    at myPackage.TestNGforHDFC.websiteTitle(TestNGforHDFC.java:24)
    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:108)

package myPackage;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class TestNGforHDFC {
    public WebDriver driver;
    public String urlUnderTest = "http://www.google.com";
    public String projLocation = "C:\\Users\\Nikita Agrawal\\Selenium\\geckodriver.exe";
    @BeforeTest
    public void login()
    {
        System.setProperty("webdriver.gecko.driver", projLocation);
        WebDriver driver = new FirefoxDriver();
        driver.get(urlUnderTest);
        System.out.println(driver.getCurrentUrl());
    }

    @Test
public void websiteTitle()
    {
        System.out.println(driver.getTitle());
    }
}

Answer 1

类变量driver永远不会被初始化，您在driver方法中定义了一个名为login的新变量。

使用：

public void login(){
    driver = new FirefoxDriver();
    ....
}

而不是：

public void login(){
    WebDriver driver = new FirefoxDriver();
    ....
}

Selenium TestNG框架无法在多个测试中调用驱动程序对象

1 个答案: