带有PageFactory的Selenium java.lang.NullPointerException [英] Selenium java.lang.NullPointerException with PageFactory
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问题描述
我正试图抓住PageFactory POM，但是有些东西不起作用，我无法理解什么是错误。
I'm trying to get a hang of PageFactory POM, however something is not working and I can not understand what is wrong.
这是我的第一个POM课程主页：
This is my first POM class for Home Page:
package PageFactory;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.FindBy;
import org.openqa.selenium.support.PageFactory;
public class Home_Page_POF {
public WebDriver driver;
@FindBy(css = "div#header-profile a#header-profile-toggle")
public WebElement profileToggleButton;
@FindBy(css = "form#loginUserdataForm div.footer div.add-footer a.btn.btn-link.linkicon")
public WebElement newRegistrationButton;
public Home_Page_POF(WebDriver driver) {
this.driver = driver;
PageFactory.initElements(driver, this);
}
}
这是第二个POM类Reg。页面
This is the second POM class for the Reg. page
package PageFactory;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.FindBy;
import org.openqa.selenium.support.PageFactory;
import org.openqa.selenium.support.ui.Select;
public class Registration_Page_POF {
public WebDriver driver;
//Personal details WebElements
@FindBy(css = "form#personalDetailsForm div.profile.pe div.profile-block.simple.first fieldset#pefield-title select#pesalutation")
public WebElement titleDropdown;
public Select titleSelect = new Select(titleDropdown);
public Registration_Page_POF(WebDriver driver) {
this.driver = driver;
PageFactory.initElements(driver, this);
}
}
这是测试用例：
package Tests;
import PageFactory.Home_Page_POF;
import PageFactory.Registration_Page_POF;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.io.TemporaryFilesystem;
import org.openqa.selenium.support.ui.Select;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import java.util.concurrent.TimeUnit;
public class Test_POF {
public WebDriver driver;
Home_Page_POF objHomePage;
Registration_Page_POF objRegPage;
@BeforeClass
public void browserSetUp() {
System.setProperty("webdriver.chrome.driver", "D:/Install/selenium-2.53.0/drivers/chromedriver.exe");
driver = new ChromeDriver();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
driver.navigate().to("http://www.lufthansa.com/");
}
@AfterClass
public void broserCleanUp() {
if (driver != null) {
TemporaryFilesystem.getDefaultTmpFS().deleteTemporaryFiles();
driver.close();
driver.quit();
}
}
@Test
public void Test0001() {
objHomePage = new Home_Page_POF(driver);
objHomePage.profileToggleButton.click();
objHomePage.newRegistrationButton.click();
objRegPage = new Registration_Page_POF(driver);
Select titleSelect = new Select(objRegPage.titleDropdown);
titleSelect.selectByVisibleText("Mr.");
}
}
因此HomePage对象工作正常，我点击两个按钮，然后进入注册页面。
之后我想从下拉列表中选择一个值，但它给了我NullPointerException：
So the HomePage objects are working fine, I click on two buttons and proceed to registration page. After that I want to select a value from dropdown, but it gives me NullPointerException:
java.lang.NullPointerException
at org.openqa.selenium.support.ui.Select.<init>(Select.java:44)
at PageFactory.Registration_Page_POF.<init>(Registration_Page_POF.java:17)
at Tests.Test_POF.Test0001(Test_POF.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:816)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1124)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:774)
at org.testng.TestRunner.run(TestRunner.java:624)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)
at org.testng.SuiteRunner.run(SuiteRunner.java:261)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.run(TestNG.java:1048)
at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:74)
at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
推荐答案
问题是你正在初始化变量 titleSelect 在课堂上。 Just Initialize内部构造函数或找到元素之后;
The Problem is you are initializing the varaible titleSelect in class itself. Just Initialize inside constructor or after finding the element;
public class Registration_Page_POF {
public WebDriver driver;
//Personal details WebElements
@FindBy(css = "form#personalDetailsForm div.profile.pe div.profile-block.simple.first fieldset#pefield-title select#pesalutation")
public WebElement titleDropdown;
public Select titleSelect; //Dont initialize here
public Registration_Page_POF(WebDriver driver) {
this.driver = driver;
PageFactory.initElements(driver, this);
titleSelect = new Select(titleDropdown);//initialize here
}
}
这篇关于带有PageFactory的Selenium java.lang.NullPointerException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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