無法使用Selenium 3.0.0-beta3與Geckodriver啟動Firefox 41

Question

我正在使用WebDriver運行一些快速測試。 我調低了FirefoxWebDriver和ChromeWebDriver ; geckodriver-v0.10.0-win64.zip和chromedriver_win32.zip 。

它們被提取到路徑位置，並已相應重命名； wires.exe和chromedriver.exe 。

創建測試時，請執行以下操作：

DesiredCapabilities cap = DesiredCapabilities.firefox();
cap.setCapability("marionette", true);
WebDriver driver = new FirefoxDriver(cap);

//WebDriver driver = new ChromeDriver(DeesiredCapabilities.chrome());

對於Firefox ，它無法創建會話（並且測試失敗），而chrome成功后又通過了測試。

測試的輸出如下：

 Sep 28, 2016 2:51:32 PM org.openqa.selenium.remote.ProtocolHandshake createSession INFO: Attempting bi-dialect session, assuming Postel's Law holds true on the remote end Sep 28, 2016 2:51:38 PM org.openqa.selenium.remote.ProtocolHandshake createSession INFO: Falling back to straight W3C remote end connection Sep 28, 2016 2:51:44 PM org.openqa.selenium.remote.ProtocolHandshake createSession INFO: Falling back to original OSS JSON Wire Protocol. org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure. Build info: version: 'unknown', revision: 'c7b525d', time: '2016-09-01 14:57:44 -0700' System info: host: 'CHI-CS-55DXX52', ip: '10.60.68.15', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_77' Driver info: driver.version: FirefoxDriver at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:618) at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:242) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:129) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:231) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:219) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:214) at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:131) at com.polymerdart.webdriver.MyFirstTest.startWebDriver(MyFirstTest.java:21) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) 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.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:117) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: org.openqa.selenium.SessionNotCreatedException: Unable to create new remote session. desired capabilities = Capabilities [{marionette=true, browserName=firefox, version=, platform=ANY}], required capabilities = Capabilities [{}] Build info: version: 'unknown', revision: 'c7b525d', time: '2016-09-01 14:57:44 -0700' System info: host: 'CHI-CS-55DXX52', ip: '10.60.68.15', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_77' Driver info: driver.version: FirefoxDriver at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:80) at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:141) at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:82) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:597) ... 34 more 

我確實看到Firefox打開，但是它無法創建會話並關閉。 我目前正在這台機器上運行Firefox version 41.0

Answer 1

這是Selenium3和Mozilla Firefox版本之間的功能無法解決的問題。

其實Selenium3支持可執行geckodriver推出Mozilla Firefox ，就像現在其他車手，但可執行geckodriver兼容Mozilla Firefox >= v47 ，這就是為什么你就麻煩了。

有兩種方法可以解決此問題：-

• 也將您的硒版本降級到Selenium2 。

• 也升級您的Mozilla Firefox >= v47 ，並嘗試使用Selenium3並啟動FirefoxDriver ，如下所示：-

   //Set system property with downloaded executable geckodriver from your system location DesiredCapabilities cap = DesiredCapabilities.firefox(); cap.setCapability("marionette", true); WebDriver driver = new FirefoxDriver(cap);