[英]Null pointer exception in selenium webdriver - TestNG - PageFactory
我正在嘗試使用selenium webdriver,testng和頁面工廠自動化。 但我面臨空指針異常。
public class BrowserOpenClose extends Common {
public WebDriver driver;
@BeforeTest
@Parameters("browser")
public void initBrowser(String browser) {
if (browser.equalsIgnoreCase("FF")) {
System.setProperty("webdriver.firefox.marionette", "./gecko/geckodriver.exe");
driver = new FirefoxDriver();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("https://www.flipkart.com/");
} else if (browser.equalsIgnoreCase("CH")) {
System.setProperty("webdriver.chrome.driver", "./chrome/chromedriver.exe");
driver = new ChromeDriver();
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
driver.get("https://www.flipkart.com/");
}
}
@AfterTest
public void closeBrowser() {
waitUntil(10);
driver.quit();
}
}
public class Login extends BrowserOpenClose {
@FindBy(xpath = "//a[text()='Log In']")
private WebElement loginLink;
@FindBy(xpath = "//input[@class='_2zrpKA']")
private WebElement username;
@FindBy(xpath = "//input[@class='_2zrpKA _3v41xv']")
private WebElement password;
@FindBy(xpath = "//button[@class='_3zLR9i _1LctnI _36SmAs']")
private WebElement loginButton;
public Login(WebDriver driver) {
PageFactory.initElements(driver, this);
this.driver = driver;
}
public void openLoginDialog() {
loginLink.click();
}
public void enterUsername(String name) {
username.sendKeys(name);
}
public void enterPassword(String pass) {
password.sendKeys(pass);
}
public void clickLogin() {
loginButton.click();
}
}
public class SwitchTShirtPage extends BrowserOpenClose {
WebDriver driver;
Login login;
@BeforeMethod
public void initElements() {
login = new Login(driver);
}
@Test
public void switchToTShirt() {
login.openLoginDialog();
login.enterUsername("abc");
login.enterPassword("xyz");
login.clickLogin();
}
}
錯誤跟蹤日志 :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。$ Proxy9.click(未知來源)com.omein.test.Log.Logn.Logn.Datog(Login.java:50)com.homepage.test.SwitchTShirtPage.switchToTShirt(SwitchTShirtPage.java: 28)在sun.reflect.NativeMethodAccessorImpl.invoke0(本機方法)在sun.reflect.NativeMethodAccessorImpl.invoke(未知來源)在sun.reflect.DelegatingMethodAccessorImpl.invoke(未知來源)在java.lang.reflect.Method.invoke(未知來自org.testng.internal.InvokeTethod(Invoker.java:646)org.test.invoke.invokeTethod(Invoker.java:646)的org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:100)org.test.Invoker.invokeTestMethod(Invoker.java) :811)在org.testng.in的org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1129) ternal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)org.testng.TestMethodWorker.run(TestMethodWorker.java:112)atg.testng.TestRunner.privateRun(TestRunner.java:746)atg.testng.TestRunner .RUN(TestRunner.java:600)在org.testng.SuiteRunner.runTest(SuiteRunner.java:366)在org.testng.SuiteRunner.runSequentially(SuiteRunner.java:361)在org.testng.SuiteRunner.privateRun(SuiteRunner。的java:319)在org.testng.SuiteRunner.run(SuiteRunner.java:268)在org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)在org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)在org.testng.TestNG.runSuitesSequentially(TestNG.java:1264)在org.testng.TestNG.runSuitesLocally(TestNG.java:1189)在org.testng.TestNG.runSuites(TestNG.java:1104)在org.testng.TestNG .RUN(TestNG.java:1076)在org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)在org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:152)在org.testng.remote。 RemoteTestNG.mai N(RemoteTestNG.java:57)
來自SwitchTShirtPage
WebDriver driver
永遠不會被初始化並且始終為null
。
你想要的是來自BrowserOpenClose
,所以只需從SwitchTShirtPage
刪除聲明SwitchTShirtPage
。
然后,要小心,因為driver
是使用@BeforeTest
初始化的,只能通過test(類組)運行一次。 因此,只有BrowserOpenClose
的第一個實例才會初始化driver
程序。 考慮用@BeforeClass
替換@BeforeTest
,這應該解決問題。
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