获取硒RC空null sessionId异常试图启用JQuery AddLocationStrategy

Question

我一直在尝试大部分时间来启用Selenium RC上的JQuery定位器使用我在interwebs上发现的各种建议，但没有多少运气。我已经按照包含在该线程使JQuery的定位器的建议：

How do I add a JQuery locators to Selenium Remote Control

我打补丁的TestRunner文件的建议，我应用了相同的修复到RemoteRunner文件。我还修补了相应的* .hta文件。我还将缩小的jquery.min.js文件添加到JAR文件的lib目录中。

我也尝试保持服务器JAR完好无损，并使用user-extensions.js文件（其中包含jquery.min.js）。但是这也没有奏效。

在任何情况下，我得到以下运行时错误：

19:10:50.174 ERROR - Exception running 'addLocationStrategy 'command on session null java.lang.NullPointerException: sessionId should not be null; has this session been started yet?

我的配置是：

的Win7 64位
IIS
硒服务器1.0.3
Firefox
C＃

我发现了两种风格的JavaScript用于调用.Ad dLocationStrategy（）。下面是我实现的：

[SetUp] 
public void SetupTest() 
{ 
    selenium = SeleniumUtils.GetSeleniumWithJQueryStrategy("localhost", 4444, "*firefox", "http://localhost:55023"); 
    selenium.Start(); 
    sbVerificationErrors = new StringBuilder(); 
} 

这是我的实用工具类

public static class SeleniumUtils 
    { 
    public static ISelenium GetSeleniumWithJQueryStrategy(string serverHost, int serverPort, string browserString, string browserURL) 
    { 
     ISelenium selenium = new DefaultSelenium(serverHost, serverPort, browserString, browserURL); 
     selenium.AddLocationStrategy("jquery", GetJQueryLocationStrategy2()); 
     return selenium; 
    } 

    public static string GetJQueryLocationStrategy2() 
    { 
     string r = @" 
    var loc = locator; 
    var attr = null; 
    var isattr = false; 
    var inx = locator.lastIndexOf('@'); 

    if (inx != -1) 
    { 
     loc = locator.substring(0, inx); 
     attr = locator.substring(inx + 1); 
     isattr = true; 
    } 

    var selectors = loc.split('<'); 
    var found = $(inDocument); 

    for (var i = 0; i < selectors.length; i++) 
    { 
     if (i > 0) 
     { 
      found = $(found.parents()[0]); 
     } 

     if (jQuery.trim(selectors[i]) != '') 
     { 
      found = found.find(selectors[i]); 
     } 
    } 

    if (found.length > 0) 
    { 
     if (isattr) 
     { 
      return found[0].getAttributeNode(attr); 
     } 
     else 
     { 
      return found[0]; 
     } 
    } 
    else 
    { 
     return null; 
    }"; 
     return r; 

    } 

    public static string GetJQueryLocationStrategy() 
    { 
     string r = @" 
    var loc = locator; 
    var attr = null; 
    var isattr = false; 
    var inx = locator.lastIndexOf('@'); 

    if (inx != -1) 
    { 
     loc = locator.substring(0, inx); 
     attr = locator.substring(inx +1); 
     isattr = true; 
    } 

    var found = jQuery(inDocument).find(loc); 

    if (found.length >= 1) 
    { 
     if (isattr) 
     { 
      return found[0].getAttribute(attr); 
     } 
     else 
     { 
      return found[0]; 
     } 
    } 
    else 
    { 
     return null; 
    }"; 
     return r; 
    } 
    } 

的来电来访失败：

19:10:13.297 INFO - Started org.openqa.jetty.jetty.Server@2747ee05
19:10:50.139 INFO - Checking Resource aliases
19:10:50.151 INFO - Command request: addLocationStrategy[jquery,
var loc = locator;
...(echoes rest of Javascript)...
}] on session null
19:14:09.796 ERROR - Exception running 'addLocationStrategy 'command on session null java.lang.NullPointerException: sessionId should not be null; has this session been started yet?
at org.openqa.selenium.server.FrameGroupCommandQueueSet.getQueueSet(FrameGroupCommandQueueSet.java:216)
at org.openqa.selenium.server.commands.SeleniumCoreCommand.execute(SeleniumCoreCommand.java:34)

Answer 1

的SessionID无效通常意味着硒对象未获通过。尝试传递该对象，它会起作用。

Answer 2

事实证明，我需要调用“selenium.Start（）”调用“selenium.AddLocationStrategy（...）”之前，这里是修改后的代码：

[SetUp] 
    public void SetupTest() 
    { 
    selenium = SeleniumUtils.GetSeleniumWithJQueryStrategy("localhost", 4444, "*firefox", "http://localhost:55023"); 
    sbVerificationErrors = new StringBuilder(); 
    } 

public static class SeleniumUtils 
{ 
    public static ISelenium GetSeleniumWithJQueryStrategy(string serverHost, int serverPort, string browserString, string browserURL) 
    { 
     ISelenium selenium = new DefaultSelenium(serverHost, serverPort, browserString, browserURL); 
     // Need to call .Start() before calling .AddLocationStrategy() 
     selenium.Start(); 
     selenium.AddLocationStrategy("jquery", GetJQueryLocationStrategy()); 

     return selenium; 
    } 
}