Selenium pageFactory NullPointerException for driver

Question

Selenium pageFactory NullPointerException。任何幫助將不勝感激。它適用於登錄setUp()，但在此之後，驅動程序出現null。

public class TestBase { 

    public WebDriver driver; 
    String url = PropertiesFile.readPropertiesFile("autUrl"); 

    public WebDriver getDriver() { 
     System.setProperty("webdriver.chrome.driver", 
     System.getProperty("user.dir") + "/driver/chromedriver.exe"); 

     driver = new ChromeDriver(); 

     return driver; 
    } 

    public void getUrl(String url) { 
     driver.get(url); 
     driver.manage().window().maximize(); 
    } 

    public void init() { 
     getDriver(); 
     getUrl(url); 
    } 
} 



public class LogInPage extends TestBase { 
    WebDriver driver; 
    @FindBy(id = "loginEmail")public WebElement userName_field; 
    @FindBy(name = "password")public WebElement password_field; 
    @FindBy(xpath = "//*[@id='main-content']/aside/div/form/input[2]")public WebElement SignMeIn_btn; 

    public LogInPage(WebDriver driver) { 
     this.driver = driver; 
     PageFactory.initElements(driver, this); 
    } 

    // Login 
    public void logIn(String userName, String password) { 
     userName_field.sendKeys(userName); 
     password_field.sendKeys(password); 
     SignMeIn_btn.click(); 
    } 

} 


    public class LogIn extends TestBase { 

    LogInPage logInPage; 

    private String user = PropertiesFile.readPropertiesFile("user"); 
    private String password = PropertiesFile.readPropertiesFile("password"); 



    public LogIn(WebDriver driver) { 
     this.driver = driver; 
    } 


    public void setUp(){ 
     init(); 
    } 


    public void logIn(){ 
     logInPage = new LogInPage(driver); 
     logInPage.logIn(user, password); 
    } 

} 

public class PortalsPage extends TestBase { 

    WebDriver driver; 

    @FindBy(id = "loginEmail") public WebElement userName_field; 
    @FindBy(xpath=".//*[@id='tabDetail']") public WebElement tenantPage_li; 
    @FindBy(id="tabDetail") public WebElement ownerPage_li; 
    @FindBy(xpath="//a[contains(@href,'tenant.action')]") public WebElement tenantPortal_link; 
    @FindBy(xpath="//a[contains(@href,'owner.action')]") public WebElement ownerPortal_link; 

    public PortalsPage(WebDriver driver){ 
     this.driver = driver; 
     PageFactory.initElements(driver, this); 
    } 


    public void goToPortals(){  
     userName_field.sendKeys("a"); 
     tenantPage_li.click(); 
    } 

} 

public class Portals extends TestBase { 
    PortalsPage portals; 
    WebDriver driver; 

    @BeforeClass 
    public void setUp(){ 
     LogIn login = new LogIn(driver); 
     login.setUp(); 
     login.logIn(); 

    } 

    @Test 
    public void goToPortal(){ 
     portals = new PortalsPage(driver); 
     portals.goToPortals(); 
    } 
} 

以下異常我：

失敗：goToPortal顯示java.lang.NullPointerException在 org.openqa.selenium.support.pagefactory.DefaultElementLocator.findElement（DefaultElementLocator.java:69） 在 org.openqa.selenium.support.pagefactory.internal.LocatingElementHandler.invoke（LocatingElementHandler.java:38） at com.sun.proxy。$ Proxy6.sendKeys（Unknown Source）at com.demo.pages.PortalsPage.goToPortals （PortalsPage.java:30） com.demo.control.Portals.goToPortal（Portals.java:28）處 sun.reflect.NativeMethodAccessorImpl.invoke（未知來源） sun.reflect.NativeMethodAccessorImpl.invoke0（本機方法）在 sun.reflect.DelegatingMethodAccessorImpl .invoke（Unknown Source） java.lang.reflect.Method.invoke（Unknown Source）at org.testng.internal.MethodInvocationHelper.invokeMethod（MethodInvocationHelper.java:80） at org.testng.internal.Invoker.invokeMethod （Invoker.java:714）處 org.testng.internal.Invoker.invokeTestMethods（Invoker.java:1231） org.testng.internal.Invoker.invokeTestMethod（Invoker.java:901）在 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）在 org.testng.SuiteRunner.runSequentially（SuiteRunner.java:329）在 org.testng.SuiteRunner.privateRun（SuiteRunner.java:291）在 組織.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:1198）at org.testng.TestNG.runSuitesLocally（TestNG.java： 1123）在 org.testng.TestNG.run（TestNG.java:1031）在 org.testng.remote.AbstractRemoteTestNG.run（AbstractRemoteTestNG.java:132） 在org.testng.remote.RemoteTestNG.initAndRun（RemoteTestNG。 Java的：230） 在org.testng.remote.RemoteTestNG.main（RemoteTestNG.java:76）

Answer 1

您目前的做法似乎是一個有點令人費解。但是，如果不深入探討可以用來修復整體設計的其他方法的細節，那麼應該使用清理後的代碼版本。

這裏的想法是，您只需要頁面類（以*Page代表特定頁面，並公開一些可在該特定頁面上執行的業務功能的頁面類）和測試類，以及測試類本身從TestBase

所以這裏延伸的類

LoginPage。的java

import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.support.FindBy; 
import org.openqa.selenium.support.PageFactory; 

public class LogInPage { 
    @FindBy(id = "loginEmail") 
    private WebElement userNameTextField; 
    @FindBy(name = "password") 
    private WebElement passwordTextField; 
    @FindBy(xpath = "//*[@id='main-content']/aside/div/form/input[2]") 
    private WebElement signInButton; 

    public LogInPage(WebDriver driver) { 
     PageFactory.initElements(driver, this); 
    } 

    public void logIn(String userName, String password) { 
     userNameTextField.sendKeys(userName); 
     passwordTextField.sendKeys(password); 
     signInButton.click(); 
    } 

} 

PortalsPage.java

import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.support.FindBy; 
import org.openqa.selenium.support.PageFactory; 

public class PortalsPage { 
    @FindBy(id = "loginEmail") 
    private WebElement usernameTextField; 
    @FindBy(xpath = ".//*[@id='tabDetail']") 
    private WebElement tenantPage; 
    @FindBy(id = "tabDetail") 
    private WebElement ownerPage; 
    @FindBy(xpath = "//a[contains(@href,'tenant.action')]") 
    private WebElement tenantPortalLink; 
    @FindBy(xpath = "//a[contains(@href,'owner.action')]") 
    private WebElement ownerPortalLink; 


    public PortalsPage(WebDriver driver) { 
     PageFactory.initElements(driver, this); 
    } 

    public void goToPortals() { 
     usernameTextField.sendKeys("a"); 
     tenantPage.click(); 
    } 
} 

TestBase.java

import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.chrome.ChromeDriver; 

public class TestBase { 
    private WebDriver driver; 

    protected WebDriver getDriver() { 
     if (driver != null) { 
      return driver; 
     } 
     System.setProperty("webdriver.chrome.driver", System.getProperty("user.dir") + "/driver/chromedriver.exe"); 
     driver = new ChromeDriver(); 
     return driver; 
    } 

    public void getUrl(String url) { 
     getDriver().get(url); 
     getDriver().manage().window().maximize(); 
    } 

} 

PortalsTest.java

import org.testng.annotations.BeforeClass; 
import org.testng.annotations.Test; 

public class PortalsTest extends TestBase { 
    private PortalsPage portals; 
    private String user = PropertiesFile.readPropertiesFile("user"); 
    private String password = PropertiesFile.readPropertiesFile("password"); 
    private String url = PropertiesFile.readPropertiesFile("autUrl"); 


    @BeforeClass 
    public void setUp() { 
     LogInPage login = new LogInPage(getDriver()); 
     getUrl(url); 
     login.logIn(user, password); 
    } 

    @Test 
    public void goToPortal() { 
     portals = new PortalsPage(getDriver()); 
     portals.goToPortals(); 
    } 
}