经过漫长的等待，终于迎来了selenium 3.0
从selenium 1.0 至今,差不多有十多年的历史。这个月终于迎来了selenium3.0
那么selenium3.0 为我们带来了什么？
看一下changelog怎么写的：
v3.0.0-beta2
============ * maven packaging fixes
* Update GeckoDriver --port argument in all bindings
* System property webdriver.firefox.marionette now forces the server in marionette or legacy firefox driver mode, ignoring any related Desired Capability
* Grid fix NPE's on registration when -browser not specified v3.0.0-beta1
============ IMPORTANT CHANGES * Minimum java version is now 8+
* The original RC APIs are only available via the leg-rc package.
* To run exported IDE tests, ensure that the leg-rc package is on the
classpath.
* Support for Firefox is via Mozilla's geckodriver. You may download
this from https://github.com/mozilla/geckodriver/releases
* Support for Safari is provided on macOS (Sierra or later) via
Apple's own safaridriver.
* Support for Edge is provided by MS:
https://developer.microsoft.com/en-us/microsoft-edge/tools/webdriver/
* Official support for IE requires version 9 or above. Earlier
versions may work, but are no longer supported as MS has
end-of-lifed them. Other major changes: * New html-table runner backed by WebDriver.
* Unused command line arguments are now no longer parsed.
总结一下主要的change 如下：
1. 支持java最低版本1.8
2. 支持FireFox geckodriver （下载地址：
https://github.com/mozilla/geckodriver/releases ）类似chrome driver
3. 最低支持IE9
4. 移处旧RC
并无让人心动的变化
Firefox gecko driver:
现在使用Firefox ，如果没有在property设置，将会出现以下Exception
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$100(GeckoDriverService.java:38)
at org.openqa.selenium.firefox.GeckoDriverService$Builder.findDefaultExecutable(GeckoDriverService.java:91)
at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:296)
at org.openqa.selenium.firefox.FirefoxDriver.createCommandExecutor(FirefoxDriver.java:245)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:220)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:215)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:211)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:128)
at com.dbyl.libarary.utils.DriverFactory.getFirefoxDriver(DriverFactory.java:126)
at com.dbyl.tests.getAlert.FireFoxDriver(getAlert.java:24)
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.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:648)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:834)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1142)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:771)
at org.testng.TestRunner.run(TestRunner.java:621)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1176)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1101)
at org.testng.TestNG.run(TestNG.java:1009)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
这个时候需要如下设置：
System.setProperty("webdriver.gecko.driver", "webDriver//geckodriver.exe");
Dev Tools 简介
1. 使用xpath 定位Web Element
在console 输入：$x("")
2. 使用CSS selector定位web Element
在console 里输入：$("")
3. 执行js
window.alert("")
执行jQuery
window.getComputedStyle(document.getElementById("su"),null).getPropertyValue("background")