java.lang.NullPointerException - 硒 java testng

java.lang.NullPointerException - selenium java testng

昨天我的测试工作正常,但我想使用 testng 然后出现问题。 我的主要 class leadTest:

public class leadTest {
    WebDriver driver;
  @Test
  public void f() {


 .. 
...
...
            /*------------------------Go to leads page-------------------------------*/
        LeadsPage ldsP = new LeadsPage(driver);

        dbp.gotoLeadsPage();

        ldsP.findLeadByName("nameToFind");

    }


  @BeforeClass
  public void beforeClass() {
        driver = new FirefoxDriver();
        driver.get("http://getbase.com");
        driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
  }

和我的 class LeadsPage:

public class LeadsPage {
    WebDriver driver;
String expStatus = "new";

@FindBy(id="leads-new")
WebElement addLead;

@FindBy(className = "lead-status")
WebElement UserStatus;


public void addNewLead(){
    addLead.click();
}

public void checkUsrStat(){
    String stat = UserStatus.getText().toLowerCase();
    Assert.assertEquals(stat, expStatus.toLowerCase());

}

public void findLeadByName(String leadName){

    driver.findElement(By.partialLinkText(leadName)).click();       
}

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

}

我对上面的这部分有疑问:

public void findLeadByName(String leadName){

    driver.findElement(By.partialLinkText(leadName)).click();       
}

我有错误

    AILED: f
java.lang.NullPointerException
    at leadTest.LeadsPage.findLeadByName(LeadsPage.java:38)
    at leadTest.leadTest.f(leadTest.java:101)
    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)

当我使用

@FindBy(partialLinkText="nameToFind")
WebElement ntf;

ntf.click();

它的工作原理,但我不能那样做,因为 nameToFind 的位置是可变的。

我不知道哪里出了问题...请帮助我

驱动程序变量未初始化:您尝试对空对象调用 findElement() 方法。

一种确认方法是打印驱动程序值:

System.out.println("driver=" + driver); 就在抛出异常之前

public void findLeadByName(String leadName){

System.out.println("driver=" + driver);
    driver.findElement(By.partialLinkText(leadName)).click();       
}

我也注意到了,

LeadsPage ldsP = new LeadsPage(driver);

        dbp.gotoLeadsPage();

        ldsP.findLeadByName("nameToFind");

gotoLeadsPage();和 findLeadByName();这两个函数都在相同的 class LeadsPage 中,但使用不同的对象 dbp 和 ldsp

下面的更改可能会起作用。

在 LeadsPage class 中更改您的 findLeadByName();功能如下,

public void findLeadByName(WebDriver driver, String leadName){

    this.driver.findElement(By.partialLinkText(leadName)).click();       
}

并在您的 class leadTest 调用函数 findLeadByName() 中,如下所示,

LeadsPage ldsP = new LeadsPage(driver);
ldsP.findLeadByName(driver ,"nameToFind");