我正在使用WebDriver运行一些快速测试。我对FirefoxWebDriver和ChromeWebDriver感到满意; geckodriver-v0.10.0-win64.zip和chromedriver_win32.zip。
将它们提取到路径位置并相应地重命名; <{1}}和wires.exe。
当我创建测试时，执行如下操作：
chromedriver.exe并且对于DesiredCapabilities cap = DesiredCapabilities.firefox();
cap.setCapability("marionette", true);
WebDriver driver = new FirefoxDriver(cap);
//WebDriver driver = new ChromeDriver(DeesiredCapabilities.chrome());
，它无法创建会话（并且测试失败），因为Chrome成功然后通过了测试。
测试的输出如下：
Firefox
我确实看到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打开，但它无法创建会话和关闭。我目前正在使用此计算机Firefox
答案 0 :(得分：4)
这是def solve_expo(expression):
base, exp = expression.split('^', 1) # Split off just the first ^
if '^' in exp:
return int(base) ** solve_expo(exp) # More exponents later, so resolve them and raise our base to that power
return int(base) ** int(exp) # base and exp are plain numbers, so just return base^exp
和Selenium3版本之间无法解决的问题。
实际上Mozilla Firefox支持可执行geckodriver以启动Selenium3，就像其他驱动程序一样，但可执行geckodriver与Mozilla Firefox >= v47兼容，这就是为什么你和＃39;陷入困境。
有两种方法可以解决这个问题： -
将您的硒版本降级为Selenium2。
升级您的Mozilla Firefox >= v47并尝试Mozilla Firefox并启动Selenium3，如下所示： -
FirefoxDriver