我有一个专用的测试服务器,它运行 selenium 独立服务器,没有指定角色。我在该服务器上运行了 Xvfb 和 Firefox。
我的junit测试可以成功连接并创建驱动程序对象,如下所示:
@Before
public void setUp() throws Exception {
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
driver = new RemoteWebDriver(new URL("http://192.168.132.102:4444/wd/hub/"), capabilities);
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
}
一切正常,直到我从请求的 URL 中选择某些元素:
driver.get("http://www.google.com"); // works fine
logger.info(driver.getTitle()); // working fine also
但是,当我对(在调试 session 中)的结果(elem 引用)评估任何方法时:
RemoteWebElement elem = ((RemoteWebDriver)driver).findElementById("gbqfq");
elem.getLocation(); // exception
elem.getText(); // exception
elem.getSize(); // exception
我得到 NullPointerException 如下:
Session ID: bf2eeaa9-3abd-42d5-9210-8255712b9e63
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:595)
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:268)
at org.openqa.selenium.remote.RemoteWebElement.getText(RemoteWebElement.java:152)
at match.selenium.testcases.ExampleTest.test2(ExampleTest.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
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:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.NullPointerException
at org.openqa.selenium.remote.server.handler.GetElementText.call(GetElementText.java:29)
at org.openqa.selenium.remote.server.handler.GetElementText.call(GetElementText.java:1)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:170)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
有什么办法可以克服这个问题吗?我尝试在本地计算机上将驱动程序设置为新的 FirefoxDriver
实例,但它按预期工作。不幸的是,我无法让它在远程网络驱动程序上工作。
注意:我尝试了大多数选择方法(byId、byClass、byTagname),但没有任何改变。
最佳答案
尝试使用以下方式查找元素: WebElement findElement(By by);
关于java - selenium RemoteWebDriver firefox 产生 NullPointerException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23892806/