selenium學習小記

selenium用於頁面自動化測試，其簡介云云這裏再也不粘來粘去的贅述，浪費時間。下面說說本身遇到的一點小問題，及其處理方法。

一：selenium安裝

　　安裝方法，百度一下，相比你們都會見到不少前輩們的詳細解釋。可是也並非每一個都好使的。

　　本人使用的火狐版本是53.0.3（32），直接在插件中搜索selenium，安裝了其全部插件，重啓瀏覽器，點擊selenium IDE圖標，反應半天后經給我彈出窗口selenium IDE爲安裝！！！

　　selenium官網也由於牆的問題不能訪問，後來參照了易百教程（http://www.yiibai.com/selenium/selenium_download_ide.html），成功安裝。

　　打開瀏覽器，錄製操做，重放，一切都很順利。

二：MyEclipse中使用selenium

　　第一步中已經錄製了簡單的demo。執行導出java/JUnit4/WebDriver,獲得Demo.java文件。

　　在MyEclipse中建立maven項目，根據須要，引入依賴junit，selenium-chrome-driver|selenium-firefox-driver(注意本身瀏覽器的版本)，selenium-java-client-driver。

　　把生成的Demo.java文件放入到項目中。處理包路徑等問題。

　　運行。。。

　　哈哈，問題來了！　　

java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.chrome.driver system property; for more information, see http://code.google.com/p/selenium/wiki/ChromeDriver. The latest version can be downloaded from http://code.google.com/p/chromedriver/downloads/list
...

　　根據提示，設置path：　　

File file = new File("C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe");
System.setProperty("webdriver.chrome.driver", file.getAbsolutePath());

　　再次執行，哇！好感動，瀏覽器成功啓動了！然而。。。後續的操做卻沒有，咱們記錄的訪問等等都沒有執行！

回到MyEclipse，發現JUnit報錯：

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: 'dfb1306b85be4934d23c123122e06e602a15e446', revision: 'unknown', time: '2013-01-17 15:05:54'
System info: os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0'
Driver info: driver.version: ChromeDriver
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:527)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:216)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:111)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:115)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:161)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:107)
at com.zoneland.ysj.webTest.ChromeTest.setUp(ChromeTest.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:56)
at java.lang.reflect.Method.invoke(Method.java:620)
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.RunBefores.evaluate(RunBefores.java:24)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.openqa.selenium.WebDriverException: Timed out waiting for driver server to start.
Build info: version: 'dfb1306b85be4934d23c123122e06e602a15e446', revision: 'unknown', time: '2013-01-17 15:05:54'
System info: os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0'
Driver info: driver.version: ChromeDriver
at org.openqa.selenium.remote.service.DriverService.start(DriverService.java:165)
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:62)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:506)
... 29 more
Caused by: org.openqa.selenium.net.UrlChecker$TimeoutException: Timed out waiting for [http://localhost:47688/status] to be available after 20004 ms
at org.openqa.selenium.net.UrlChecker.waitUntilAvailable(UrlChecker.java:104)
at org.openqa.selenium.remote.service.DriverService.start(DriverService.java:163)
... 31 more
Caused by: com.google.common.util.concurrent.UncheckedTimeoutException: java.util.concurrent.TimeoutException
at com.google.common.util.concurrent.SimpleTimeLimiter.callWithTimeout(SimpleTimeLimiter.java:143)
at org.openqa.selenium.net.UrlChecker.waitUntilAvailable(UrlChecker.java:79)
... 32 more
Caused by: java.util.concurrent.TimeoutException
at java.util.concurrent.FutureTask.get(FutureTask.java:213)
at com.google.common.util.concurrent.SimpleTimeLimiter.callWithTimeout(SimpleTimeLimiter.java:130)
... 33 more

 　　上述問題幾經百度未果，無奈只好硬着頭皮看報錯，原來是ChromeDriver沒法調用。通過查閱得知ChromeDriver是selenium操做chrome的驅動器，他不存在與咱們的java代碼中，咱們須要根據本身chrome的版本下載對應的ChromeDriver.exe,我將下載到的ChromeDriver.exe放在了chrome同級目錄下。而後修改咱們的代碼：

　　File file = new File("C:\\Program Files (x86)\\Google\\Chrome\\Application\\ChromeDriver.exe");
　　System.setProperty("webdriver.chrome.driver", file.getAbsolutePath());

　　運行，記錄的訪問完美執行。