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Selenium 3.0 is Out Now!
发现问题：为什么从Selenium2.x切换到Selenium 3.0驱动不了Firefox浏览器？
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Selenium2.x版本驱动Firefox浏览器方法
Selenium2.x驱动Firefox
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执行报错如下：
Exception in thread "main" java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases
at com.google.common.base.Preconditions.checkState(Preconditions.java:199)
at org.openqa.selenium.remote.service.DriverService.findExecutable(DriverService.java:109)
at org.openqa.selenium.firefox.GeckoDriverService.access$000(GeckoDriverService.java:37)
at org.openqa.selenium.firefox.GeckoDriverService$Builder.findDefaultExecutable(GeckoDriverService.java:95)
at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:296)
at org.openqa.selenium.firefox.FirefoxDriver.createCommandExecutor(FirefoxDriver.java:277)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:247)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:242)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:238)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:127)
at com.amio.automation.jianshu.Firefox.TestFirefox.main(TestFirefox.java:12)
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)
解决问题：从报错堆栈切入，逐步击破
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报错堆栈：driver必须以“webdriver.gecko.driver ”系统参数初始化设置
执行代码后，控制台报出“java.lang.IllegalStateException”错误，提示Firefox驱动必须以“webdriver.gecko.driver”环境变量初始化；如果需要更多信息，请点击https://github.com/mozilla/geckodriver；Firefox驱动文件版本下载地址，请点击https://github.com/mozilla/geckodriver/releases。
按操作系统罗列驱动文件
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完善代码：加载geckodriver驱动
加载驱动文件
##以下为完善代码后控制台的日志##
1481199653610 geckodriver INFO Listening on 127.0.0.1:38865
十二月 08, 2016 8:20:54 下午 org.openqa.selenium.remote.ProtocolHandshake createSession
信息: Attempting bi-dialect session, assuming Postel's Law holds true on the remote end
1481199654647 mozprofile::profile INFO Using profile path C:\Users\zhoup\AppData\Local\Temp\rust_mozprofile.PoufEuXzFZGx
1481199654669 geckodriver::marionette INFO Starting browser C:\Program Files (x86)\Mozilla Firefox\firefox.exe
1481199654796 geckodriver::marionette INFO Connecting to Marionette on localhost:15736
1481199656565 Marionette INFO Listening on port 15736
十二月 08, 2016 8:21:00 下午 org.openqa.selenium.remote.ProtocolHandshake createSession
信息: Detected dialect: W3C
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Exception in thread "main" org.openqa.selenium.WebDriverException: Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: WIN10
Build info: version: '3.0.1', revision: '1969d75', time: '2016-10-18 09:48:19 -0700'
System info: host: 'WIN10-612221128', ip: '192.168.10.106', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_121'
Driver info: driver.version: FirefoxDriver
at org.openqa.selenium.firefox.internal.Executable.<init>(Executable.java:75)
at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:60)
at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:56)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:127)
at LoginTest.main(LoginTest.java:21)
报错
1496731604926 addons.manager ERROR startup failed: [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIFile.create]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: resource://gre/modules/FileUtils.jsm :: FileUtils_getDir :: line 70" data: no] Stack trace: FileUtils_getDir()@resource://gre/modules/FileUtils.jsm:70 < FileUtils_getFile()@resource://gre/modules/FileUtils.jsm:42 < validateBlocklist()@resource://gre/modules/AddonManager.jsm:671 < startup()@resource://gre/modules/AddonManager.jsm:834 < startup()@resource://gre/modules/AddonManager.jsm:3129 < observe()@resource://gre/components/addonManager.js:65
JavaScript error: resource://gre/modules/AddonManager.jsm, line 1657: NS_ERROR_NOT_INITIALIZED: AddonManager is not initialized
1496731608572 Marionette INFO Listening on port 58392
JavaScript error: resource://gre/modules/AddonManager.jsm, line 2570: NS_ERROR_NOT_INITIALIZED: AddonManager is not initialized
Jun 06, 2017 2:46:48 PM org.openqa.selenium.remote.ProtocolHandshake createSession
信息: Detected dialect: W3C