java ChromeDriver组织。openqa。硒。遥远的协议握手会话

Question

下面是我得到的错误。我已经多次更改ChromeDriver和Chrome的版本，但都没有任何帮助。有人能想办法解决这个问题吗？junit 4.12 selenium版本3.141.59 向大家问好

C:\Program Files\Java\jdk-11.0.6\bin\java.exe"
    Starting ChromeDriver 76.0.3809.12 (220b19a666554bdcac56dff9ffd44c300842c933-refs/branch-heads/3809@{#83}) on port 45366
    Only local connections are allowed.
    Please protect ports used by ChromeDriver and related test frameworks to prevent access by malicious code.
    kwi 22, 2020 7:32:35 PM org.openqa.selenium.remote.ProtocolHandshake createSession
    INFO: Detected dialect: W3C

    java.lang.NullPointerException
        at Panel.GeneralForm.selectClose(GeneralForm.java:63)
        at FormTest.test_for_contact_page(FormTest.java:12)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
        at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
        at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
        at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)


    Process finished with exit code -1

Answer 1

由于在每个页面对象类中错误初始化webdriver，您将面临空指针问题，PageFactory是Selenium中内置的页面对象模型概念。除了注释，它还允许使用静态init方法初始化web元素

您可以在每个页面对象模型中使用以下init方法：

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